X-Git-Url: http://git.indexdata.com/?p=ir-tcl-moved-to-github.git;a=blobdiff_plain;f=client.tcl;h=4865ecb415a1b61600e0eb82c497b4eab8aa9f95;hp=d4a10f4bf34d4c7950b1d7a6a9aa71f06a59f827;hb=HEAD;hpb=71da3253847dfb239e28a7bb760d259ff3611ee7

diff --git a/client.tcl b/client.tcl
index d4a10f4..4865ecb 100644
--- a/client.tcl
+++ b/client.tcl
@@ -1,10 +1,91 @@
 # IR toolkit for tcl/tk
-# (c) Index Data 1995
+# (c) Index Data 1995-2001
 # See the file LICENSE for details.
 # Sebastian Hammer, Adam Dickmeiss
 #
 # $Log: client.tcl,v $
-# Revision 1.85  1996-01-19 16:22:36  adam
+# Revision 1.111  2001-12-03 18:52:06  adam
+# Configure no longer searches for Tk. Removed references to SR.
+#
+# Revision 1.110  2000/10/11 12:26:47  adam
+# Using yaz.m4 for aclocal.m4.
+#
+# Revision 1.109  1999/12/12 00:25:59  adam
+# Updated list of preconfigure targets.
+#
+# Revision 1.108  1999/11/30 14:05:58  adam
+# Updated for new location of YAZ headers.
+#
+# Revision 1.107  1999/02/11 11:30:08  adam
+# Updated for WIN32.
+#
+# Revision 1.106  1998/06/10 13:22:47  adam
+# Minor changes.
+#
+# Revision 1.105  1998/06/10 13:00:45  adam
+# Added ir-version command.
+#
+# Revision 1.104  1998/02/12 13:32:41  adam
+# Updated configuration system.
+#
+# Revision 1.103  1998/01/30 13:30:50  adam
+# Name of target database is irtdb.tcl instead of clientrc.tcl.
+#
+# Revision 1.102  1997/11/19 13:19:54  adam
+# Font fix.
+#
+# Revision 1.101  1997/11/19 11:20:56  adam
+# New target profile format - associative arrrays instead of LONG lists.
+#
+# Revision 1.100  1997/09/09 10:19:50  adam
+# New MSV5.0 port with fewer warnings.
+#
+# Revision 1.99  1997/04/13 19:00:37  adam
+# Added support for Tcl8.0/Tk8.0.
+# New command ir-log-init to setup yaz logging facilities.
+#
+# Revision 1.98  1996/11/14 17:11:04  adam
+# Added Explain documentaion.
+#
+# Revision 1.97  1996/09/13  10:54:22  adam
+# Started work on Explain in client.
+#
+# Revision 1.96  1996/08/09  15:30:18  adam
+# Procedure destroyGW modified to handle multiple calls - probably an
+# error introduced by tk4.1 patch level 1.
+#
+# Revision 1.95  1996/07/26  09:15:08  adam
+# IrTcl version 1.2 patch level 1.
+#
+# Revision 1.94  1996/07/25  15:55:34  adam
+# IrTcl version 1.2 release.
+#
+# Revision 1.93  1996/06/28  08:43:54  adam
+# Moved towards version 1.2.
+#
+# Revision 1.92  1996/03/29  16:04:30  adam
+# Work on GRS-1 presentation.
+#
+# Revision 1.91  1996/03/27  17:00:53  adam
+# Fix: main defined when using Tk3.6; it shouldn't be.
+#
+# Revision 1.90  1996/03/20  13:54:02  adam
+# The Tcl_File structure is only manipulated in the Tk-event interface
+# in tkinit.c.
+#
+# Revision 1.89  1996/03/05  09:16:04  adam
+# Sets tearoff to off on several menus.
+#
+# Revision 1.88  1996/01/23  15:24:09  adam
+# Wrore more comments.
+#
+# Revision 1.87  1996/01/22  17:13:34  adam
+# Wrote comments.
+#
+# Revision 1.86  1996/01/22  09:29:01  adam
+# Wrote comments.
+#
+# Revision 1.85  1996/01/19  16:22:36  adam
 # New method: apduDump - returns information about last incoming APDU.
 #
 # Revision 1.84  1996/01/11  13:12:10  adam
@@ -296,6 +377,8 @@
 #
 #
 
+
+# Procedure tk4 is defined - returns 0 if tk 3.6 - returns 1 otherwise
 if {$tk_version == "3.6"} {
     proc tk4 {} {
         return 0
@@ -306,13 +389,37 @@ if {$tk_version == "3.6"} {
     }
 }
 
+# The following procedures deals with menu entries. The interface
+# changed from Tk 3.6 to 4.X
+
+# Procedure irmenu
+if {[tk4]} {
+    proc irmenu {w} {
+	    menu $w -tearoff off
+    }
+} else {
+    proc irmenu {w} {
+	    menu $w
+	}
+}
+    
+# Procedure configure-enable-e {w n}
+#  w   is a menu
+#  n   menu entry number (0 is first entry)
+# Enables menu entry
+
+# Procedure configure-disable-e {w n}
+#  w   is a menu
+#  n   menu entry number (0 is first entry)
+# Disables menu entry
+
 if {[tk4]} {
     proc configure-enable-e {w n} {
-        incr n
+#        incr n
         $w entryconfigure $n -state normal
     }
     proc configure-disable-e {w n} {
-        incr n
+#        incr n
         $w entryconfigure $n -state disabled
     }
     set noFocus [list -takefocus 0]
@@ -326,6 +433,14 @@ if {[tk4]} {
     set noFocus {}
 }
 
+# Define dummy clock function if it is not there.
+if {[catch {clock seconds}]} {
+    proc clock {args} {
+        return {}
+    }
+}
+# Set monoFlag to 1 if screen is known not to support colors; otherwise
+#  set monoFlag to 0
 if {![tk4]} {
     if {[tk colormodel .] == "color"} {
         set monoFlag 0
@@ -336,10 +451,18 @@ if {![tk4]} {
     set monoFlag 0
 }
 
+# Define libdir to the IrTcl configuration directory.
+# In the line below LIBDIR will be modified during 'make install'.
 set libdir LIBDIR
+
+# If the bitmaps sub directory is present with a bitmap we assume 
+# the client is run from the source directory in which case we
+# set libdir the current directory.
 if {[file readable bitmaps/book2]} {
     set libdir .
 }
+
+# Make a final check to see if libdir was set ok.
 if {! [file readable ${libdir}/bitmaps/book2]} {
     puts "Cannot locate system files in ${libdir}. You must either run this"
     puts "program from the source directory root of ir-tcl or you must assure"
@@ -347,11 +470,38 @@ if {! [file readable ${libdir}/bitmaps/book2]} {
     exit 1
 }
 
+# Initialize a lot of globals.
 set hotTargets {}
 set hotInfo {}
 set busy 0
 
-set profile(Default) {{} {} {210} {} 50000 30000 tcpip {} 1 {} {} Z39 1 2 0 0 4}
+set profile(Default,description) {}
+set profile(Default,host) {}
+set profile(Default,port) 210
+set profile(Default,authentication) {}
+set profile(Default,maximumRecordSize) 50000
+set profile(Default,preferredMessageSize) 30000
+set profile(Default,comstack) tcpip
+set profile(Default,namedResultSets) 1
+set profile(Default,queryRPN) 1
+set profile(Default,queryCCL) 0
+set profile(Default,protocol) Z39
+set profile(Default,windowNumber) 1
+set profile(Default,largeSetLowerBound) 2
+set profile(Default,smallSetUpperBound) 0
+set profile(Default,mediumSetPresentNumber) 0
+set profile(Default,presentChunk) 4
+set profile(Default,timeDefine) {}
+set profile(Default,timeLastInit) {}
+set profile(Default,timeLastExplain) {}
+set profile(Default,targetInfoName) {}
+set profile(Default,recentNews) {}
+set profile(Default,maxResultSets) {}
+set profile(Default,maxResultSize) {}
+set profile(Default,maxTerms) {}
+set profile(Default,multipleDatabases) 0
+set profile(Default,welcomeMessage) {}
+
 set hostid Default
 set settingsChanged 0
 set setNo 0
@@ -368,48 +518,118 @@ set debugMode 0
 
 set queryTypes {Simple}
 set queryButtons { { {I 0} {I 1} {I 2} } }
-set queryInfo { { {Title {1=4 4=1}} {Author {1=1}} \
-        {Subject {1=21}} {Any {1=1016}} } }
+set queryInfo {{{Title {1=4}} {Author {1=1003}} \
+        {Subject {1=21}} {Any {1=1016}} {Abstract {1=62}}}}
 wm minsize . 0 0
 
 set setOffset 0
 set setMax 0
 
-proc tkerror err {
-    set w .tkerrorw
+if {[lindex [split $tk_version .] 0] < 5} {
+    set font(bb,normal) -Adobe-Helvetica-Medium-R-Normal-*-240-*
+    set font(bb,bold) -Adobe-Helvetica-Bold-R-Normal-*-240-*
+    set font(b,normal) -Adobe-Helvetica-Medium-R-Normal-*-180-*
+    set font(b,bold) -Adobe-Helvetica-Bold-R-Normal-*-180-*
+    set font(n,normal) -Adobe-Helvetica-Medium-R-Normal-*-120-*
+    set font(n,bold) -Adobe-Helvetica-Bold-R-Normal-*-120-*
+    set font(s,bold) -Adobe-Helvetica-Bold-R-Normal-*-100-*
+    set font(ss,bold) -Adobe-Helvetica-Bold-R-Normal-*-80-*
+} else {
+    set font(bb,normal) {Helvetica 24}
+    set font(bb,bold) {Helvetica 24 bold}
+    set font(b,normal) {Helvetica 24}
+    set font(b,bold) {Helvetica 18 bold}
+    set font(n,normal) {Helvetica 12}
+    set font(n,bold) {Helvetica 12 bold}
+    set font(s,bold) {Helvetica 10 bold}
+    set font(ss,bold) {Helvetica 8 bold}
+}
 
-    if {[winfo exists $w]} {
-        destroy $w
+# Procedure tkerror {err}
+#   err   error message
+# Override the Tk error handler function.
+if {1} {
+    proc tkerror err {
+	global font
+	set w .tkerrorw
+	
+	if {[winfo exists $w]} {
+	    destroy $w
+	}
+	toplevel $w
+	wm title $w "Error"
+	
+	place-force $w .
+	top-down-window $w
+	
+	label $w.top.b -bitmap error
+	message $w.top.t -aspect 300 -text "Error: $err" \
+            -font $font(b,bold)
+	pack $w.top.b $w.top.t -side left -padx 10 -pady 10
+	
+	bottom-buttons $w [list {Close} [list destroy $w]] 1
     }
-    toplevel $w
-    wm title $w "Error"
-
-    place-force $w .
-    top-down-window $w
+}
+# Read tag set file (if present)
+if {[file readable "${libdir}/tagsets.tcl"]} {
+    source "${libdir}/tagsets.tcl"
+}
 
-    label $w.top.b -bitmap error
-    message $w.top.t -aspect 300 -text "Error: $err" \
-            -font -Adobe-Helvetica-Bold-R-Normal-*-180-*
-    pack $w.top.b $w.top.t -side left -padx 10 -pady 10
+# Read the global target configuration file.
+if {[file readable "${libdir}/irtdb.tcl"]} {
+    source "${libdir}/irtdb.tcl"
+}
+# Read the local target configuration file.
+if {[file readable "irtdb.tcl"]} {
+    source "irtdb.tcl"
+}
 
-    bottom-buttons $w [list {Close} [list destroy $w]] 1
+# Read the user configuration file.
+if {[file readable "~/.clientrc.tcl"]} {
+    source "~/.clientrc.tcl"
 }
 
-if {[file readable "clientrc.tcl"]} {
-    source "clientrc.tcl"
-} else {
-    if {[file readable "${libdir}/clientrc.tcl"]} {
-        source "${libdir}/clientrc.tcl"
+# Convert old format to new format...
+foreach target [array names profile] {
+    set timedef [clock seconds]
+    if {[string first , $target] == -1} {
+	if {![info exists profile($target,port)]} {
+	    foreach n [array names profile Default,*] {
+		set profile($target,[string range $n 8 end]) $profile($n)
+	    }
+	    set profile($target,description) [lindex $profile($target) 0]
+	    set profile($target,host) [lindex $profile($target) 1]
+	    set profile($target,port) [lindex $profile($target) 2]
+	    set profile($target,authentication) [lindex $profile($target) 3]
+	    set profile($target,maximumRecordSize) \
+		[lindex $profile($target) 4]
+	    set profile($target,preferredMessageSize) \
+		[lindex $profile($target) 5]
+	    set profile($target,comstack) [lindex $profile($target) 6]
+	    set profile($target,databases) [lindex $profile($target) 7]
+	    set profile($target,timeDefine) $timedef
+	    set profile($target,windowNumber) 1
+	}
+	unset profile($target)
     }
 }
 
-if {[file readable "~/.clientrc.tcl"]} {
-    source "~/.clientrc.tcl"
+# Assign unique ID's to each target's window number
+set wno 1
+foreach n [array names profile *,windowNumber] {
+    set profile($n) $wno
+    incr wno
 }
+set profile(Default,windowNumber) $wno
 
+# These globals describe the current query type. They are set to the
+# first query type.
 set queryButtonsFind [lindex $queryButtons 0]
 set queryInfoFind [lindex $queryInfo 0]
 
+# Procedure read-formats
+# Read all Tcl source files in the subdirectory 'formats'.
+# The name of each source will correspond to a display format.
 proc read-formats {} {
     global displayFormats
     global libdir
@@ -428,6 +648,9 @@ proc read-formats {} {
     cd $oldDir
 }
 
+# Procedure set-wrap {m}
+#  m    boolean wrap mode
+# Handler to enable/disable text wrap in the main record window
 proc set-wrap {m} {
     global textWrap
 
@@ -435,6 +658,9 @@ proc set-wrap {m} {
     .data.record configure -wrap $m
 }
 
+# Procedure dputs {m}
+#  m    string to be printed
+# puts utility for debugging.
 proc dputs {m} {
     global debugMode
     if {$debugMode} {
@@ -442,6 +668,8 @@ proc dputs {m} {
     }
 }
 
+# Procedure apduDump {}
+# Logs BER dump of last APDU in window if debugMode is true.
 proc apduDump {} {
     global debugMode
 
@@ -463,9 +691,9 @@ proc apduDump {} {
         
         top-down-window $w
         
-        text $w.top.t -width 60 -height 12 -wrap word -relief flat \
-                -borderwidth 0 \
-                -yscrollcommand [list $w.top.s set]
+        text $w.top.t -font fixed -width 60 -height 12 -wrap word \
+            -relief flat -borderwidth 0 \
+			-yscrollcommand [list $w.top.s set] -background grey85
         scrollbar $w.top.s -command [list $w.top.t yview]
         
         pack $w.top.s -side right -fill y
@@ -482,11 +710,11 @@ proc apduDump {} {
 
 }
 
-
+# Procedure set-display-format {f}
+#  f    display format
+# Reformats main record window to use display format given by f
 proc set-display-format {f} {
-    global displayFormat
-    global setNo
-    global busy
+    global displayFormat setNo busy
 
     set displayFormat $f
     if {$setNo == 0} {
@@ -499,24 +727,15 @@ proc set-display-format {f} {
     add-title-lines -1 10000 1
 }
 
+# Procedure initBindings
+# Disables various default bindings for Text and Listbox widgets.
 proc initBindings {} {
-    set w Text
-    bind $w <1> {}
-    bind $w <Double-1> {}
-    bind $w <Triple-1> {}
-    bind $w <B1-Motion> {}
-    bind $w <Shift-1> {}
-    bind $w <Shift-B1-Motion> {}
-    bind $w <2> {}
-    bind $w <B2-Motion> {}
-    bind $w <Any-KeyPress> {}
-    bind $w <Return> {}
-    bind $w <BackSpace> {}
-    bind $w <Delete> {}
-    bind $w <Control-h> {}
-    bind $w <Control-d> {}
-    bind $w <Control-v> {}
+    global TextBinding
 
+    foreach e [bind Text] {
+        set TextBinding($e) [bind Text $e]
+        bind Text $e {}
+    }
     set w Listbox
     bind $w <B1-Motion> {}
     bind $w <Shift-B1-Motion> {}
@@ -524,6 +743,20 @@ proc initBindings {} {
     set w Entry
 }
 
+# Procedure TextEditable 
+# Apply "standard" events to a text widget. It should be editable now.
+proc TextEditable {w} {
+    global TextBinding
+
+    foreach e [array names TextBinding] {
+        bind $w $e $TextBinding($e)
+    }
+}
+
+# Procedure post-menu {wbutton wmenu}
+#   wbutton    button widget
+#   wmenu      menu widget
+# Post menu near button. Note: not used.
 proc post-menu {wbutton wmenu} {
     $wmenu activate none
     focus $wmenu
@@ -532,24 +765,53 @@ proc post-menu {wbutton wmenu} {
 
 }
 
+# Procedure place-force {window parent}
+#  window      new top level widget
+#  parent      parent widget used as base
+# Sets geometry of $window relative to $parent window.
+proc place-force {window parent} {
+    set g [wm geometry $parent]
+
+    set p1 [string first + $g]
+    set p2 [string last + $g]
+
+    set x [expr 40+[string range $g [expr $p1 +1] [expr $p2 -1]]]
+    set y [expr 60+[string range $g [expr $p2 +1] end]]
+    wm geometry $window +${x}+${y}
+}
+
+# Procedure destroyGW {w}
+#   w     top level widget
+# Saves geometry of widget w in windowGeometry array. This
+# Procedure is used to save current geometry of a window before
+# it is destroyed.
+# See also topLevelG.
 proc destroyGW {w} {
     global windowGeometry
-    set windowGeometry($w) [wm geometry $w]
+    catch {set windowGeometry($w) [wm geometry $w]}
 }    
+
+# Procedure topLevelG
+#   w     top level widget
+# Makes a new top level widget named w; sets geometry of window if it 
+# exists in windowGeometry array. The destroyGW procedure is set 
+# to be called when the Destroy event occurs.
 proc toplevelG {w} {
     global windowGeometry
 
     toplevel $w
     if {[info exists windowGeometry($w)]} {
         set g $windowGeometry($w)
-        if {$g != ""} {
+        if {[string length $g]} {
             wm geometry $w $g
         }
     }
     bind $w <Destroy> [list destroyGW $w]
 }
 
-
+# Procedure top-down-window {w}
+#  w    window (possibly top level)
+# Makes two frames inside w called top and bot.
 proc top-down-window {w} {
     frame $w.top -relief raised -border 1
     frame $w.bot -relief raised -border 1
@@ -558,6 +820,22 @@ proc top-down-window {w} {
     pack  $w.bot -fill both
 }
 
+# Init: The geometry information for the main window is set - either
+# to a default value or to the value in windowGeometry(.)
+if {[catch {set g $windowGeometry(.)}]} {
+    wm geometry . 420x340+20+20
+} else {
+    wm geometry . $g
+}
+
+# Procedure top-down-ok-cancel {w ok-action g}
+#  w          top level widget with $w.bot-frame
+#  ok-action  ok script
+#  g          grab flag
+# Makes two buttons in the bot frame called Ok and Cancel. The
+# ok-action is executed if Ok is pressed. If Cancel is activated
+# The window is destroyed. If g is true a grab is performed on the
+# window and the procedure waits until the window is destroyed.
 proc top-down-ok-cancel {w ok-action g} {
     frame $w.bot.left -relief sunken -border 1
     pack $w.bot.left -side left -expand yes -ipadx 2 -ipady 2 -padx 1 -pady 1
@@ -574,6 +852,15 @@ proc top-down-ok-cancel {w ok-action g} {
     }
 }
 
+# Procedure bottom-buttons {w buttonList g}
+#  w          top level widget with $w.bot-frame
+#  buttonList button specifications
+#  g          grab flag
+# Makes a list of buttons in the $w.bot frame. The buttonList is a list 
+# of button specifications. Each button specification consists of two
+# items; the first item is button label name; the second item is a script
+# of be executed when that button is executed. A grab is performed if g 
+# is true and it waits for the window to be destroyed.
 proc bottom-buttons {w buttonList g} {
     set i 0
     set l [llength $buttonList]
@@ -598,10 +885,14 @@ proc bottom-buttons {w buttonList g} {
     }
 }
 
+# Procedure cancel-operation
+# This handler is invoked when the user wishes to cancel an operation.
+# If the system is currently busy a "Cancel" will be displayed in the
+# status area and the cancelFlag is set to true indicating that future
+# responses from the target should be ignored. The system is no longer
+# busy when this procedure exists.
 proc cancel-operation {} {
-    global cancelFlag
-    global busy
-    global delayRequest
+    global cancelFlag busy delayRequest
 
     if {$busy} {
         set cancelFlag 1
@@ -610,23 +901,30 @@ proc cancel-operation {} {
     }
 }
 
+# Procedure show-target {target base}
+#  target     name of target
+#  base       name of database
+# Displays target name and database name in the target status area.
 proc show-target {target base} {
-    global profile
-
-    if {$target == ""} {
-        .bot.a.target configure -text ""
+    if {![string length $target]} {
+        .bot.a.target configure -text {}
         return
     }
-    if {$base == ""} {
+    if {![string length $base]} {
          .bot.a.target configure -text "$target"
     } else {
          .bot.a.target configure -text "$target - $base"
     }
 }
 
+# Procedure show-logo {v1}
+#  v1    integer level
+# This procedure maintains the book logo in the bottom of the screen.
+# It is invoked only once during initialization of windows, etc., and
+# by itself. The global 'busy' variable determines whether the logo is
+# moving or not.
 proc show-logo {v1} {
-    global busy
-    global libdir
+    global busy libdir
 
     if {$busy != 0} {
         incr v1
@@ -646,13 +944,17 @@ proc show-logo {v1} {
         }
     }
 }
-        
+
+# Procedure show-status {status b sb}
+#  status     status message string
+#  b          busy indicator
+#  sb         search busy indicator
+# Display status information according to 'status' and sets the global
+# busy flag 'busy' to b if b is non-empty. If sb is non-empty it indicates
+# whether service buttons should be enabled or disabled.
 proc show-status {status b sb} {
-    global busy
-    global scanEnable
-    global setOffset
-    global setMax
-    global setNo
+    global busy scanEnable
+    global setOffset setMax setNo
 
     .bot.a.status configure -text "$status"
     if {$b == 1} {
@@ -668,6 +970,8 @@ proc show-status {status b sb} {
         .mid.search configure -state normal
         if {$scanEnable} {
             .mid.scan configure -state normal
+        } else {
+            configure-disable-e .top.service.m 3
         }
         if {$setNo == 0} {
             configure-disable-e .top.service.m 1
@@ -696,10 +1000,19 @@ proc show-status {status b sb} {
     }
 }
 
+# Procedure show-message {msg}
+#  msg    message string
+# Sets message the bottom of the screen to msg.
 proc show-message {msg} {
     .bot.a.message configure -text "$msg"
 }
 
+# Procedure insertWithTags {w text args}
+#  w      text widget
+#  text   string to be inserted
+#  args   list of tags
+# Inserts text at the insertion point in widget w. The text is tagged 
+# with the tags in args.
 proc insertWithTags {w text args} {
     set start [$w index insert]
     $w insert insert $text
@@ -711,6 +1024,8 @@ proc insertWithTags {w text args} {
     }
 }
 
+# Procedure popup-license
+# Displays LICENSE information.
 proc popup-license {} {
     global libdir
     set w .popup-licence
@@ -723,7 +1038,7 @@ proc popup-license {} {
     top-down-window $w
 
     text $w.top.t -width 80 -height 10 -wrap word -relief flat -borderwidth 0 \
-        -yscrollcommand [list $w.top.s set]
+        -font fixed -yscrollcommand [list $w.top.s set]
     scrollbar $w.top.s -command [list $w.top.t yview]
     
     pack $w.top.s -side right -fill y
@@ -740,9 +1055,12 @@ proc popup-license {} {
     bottom-buttons $w [list {Close} [list destroy $w]] 1
 }
 
+# Procedure about-target
+# Displays various information about the current target, such
+# as implementation-name, implementation-id, etc.
 proc about-target {} {
     set w .about-target-w
-    global hostid
+    global hostid font
 
     toplevel $w
 
@@ -756,8 +1074,7 @@ proc about-target {} {
     pack $w.top.a $w.top.p -side top -fill x
     
     label $w.top.a.about -text "About"
-    label $w.top.a.irtcl -text $hostid \
-            -font -Adobe-Helvetica-Bold-R-Normal-*-240-*
+    label $w.top.a.irtcl -text $hostid -font $font(bb,bold)
     pack $w.top.a.about $w.top.a.irtcl -side top
 
     set i [z39 targetImplementationName]
@@ -774,6 +1091,9 @@ proc about-target {} {
     bottom-buttons $w [list {Close} [list destroy $w]] 1
 }
 
+# Procedure about-origin-logo {n}
+#   n    integer level
+# Displays book logo in the .about-origin-w widget
 proc about-origin-logo {n} {
     global libdir
     set w .about-origin-w
@@ -788,10 +1108,11 @@ proc about-origin-logo {n} {
     after 140 [list about-origin-logo $n]
 }
 
+# Procedure about-origin
+# Display various information about origin (this client).
 proc about-origin {} {
     set w .about-origin-w
-    global libdir
-    global tk_version
+    global libdir font tk_version
     
     if {[winfo exists $w]} {
         destroy $w
@@ -807,31 +1128,31 @@ proc about-origin {} {
 
     pack $w.top.a $w.top.p -side top -fill x
     
-    label $w.top.a.irtcl -text "IrTcl" \
-            -font -Adobe-Helvetica-Bold-R-Normal-*-240-*
+    label $w.top.a.irtcl -text "IrTcl" -font $font(bb,bold)
     label $w.top.a.logo -bitmap @${libdir}/bitmaps/book1 
     pack $w.top.a.irtcl $w.top.a.logo -side left -expand yes
 
-    set i unknown
-    catch {set i [z39 implementationName]}
-    label $w.top.p.in -text "Implementation name: $i"
-    catch {set i [z39 implementationId]}
-    label $w.top.p.ii -text "Implementation id: $i"
-    catch {set i [z39 implementationVersion]}
-    label $w.top.p.iv -text "Implementation version: $i"
-    set i $tk_version
-    label $w.top.p.tk -text "Tk version: $i"
+    label $w.top.p.irtcl -text "IrTcl version: [lindex [ir-version] 0]"
+    label $w.top.p.yaz -text "Yaz version: [lindex [ir-version] 1]"
 
-    pack $w.top.p.in $w.top.p.ii $w.top.p.iv $w.top.p.tk -side top -anchor nw
+    label $w.top.p.tk -text "Tk version: $tk_version"
+
+    pack $w.top.p.irtcl $w.top.p.yaz $w.top.p.tk -side top -anchor nw
 
     about-origin-logo 1
     bottom-buttons $w [list {Close} [list destroy $w] \
                             {License} [list popup-license]] 0
 }
 
+# Procedure popup-marc {sno no b df}
+#  sno     result set number
+#  no      record position number
+#  b       popup window number
+#  df      display format
+# Displays record in set $sno at position $no in window .full-marc$b.
+# The global variable $popupMarcdf holds the current format method.
 proc popup-marc {sno no b df} {
-    global displayFormats
-    global popupMarcdf
+    global font displayFormats popupMarcdf
 
     if {[z39.$sno type $no] != "DB"} {
         return
@@ -855,8 +1176,9 @@ proc popup-marc {sno no b df} {
         pack  $w.top -side top -fill both -expand yes
         pack  $w.bot -fill both
 
-        text $w.top.record -width 60 -height 5 -wrap word -relief flat -borderwidth 0 \
-                -yscrollcommand [list $w.top.s set]
+        text $w.top.record -width 60 -height 5 -wrap word -relief flat \
+                -borderwidth 0 -font fixed \
+                -yscrollcommand [list $w.top.s set] -background grey85
         scrollbar $w.top.s -command [list $w.top.record yview]
 
         global monoFlag
@@ -868,18 +1190,14 @@ proc popup-marc {sno no b df} {
             $w.top.record tag configure marc-id -foreground black
         }
         $w.top.record tag configure marc-data -foreground black
-        $w.top.record tag configure marc-head \
-                -font -Adobe-Times-Medium-R-Normal-*-180-* \
+        $w.top.record tag configure marc-head -font $font(n,bold) \
                 -background black -foreground white
 
-        $w.top.record tag configure marc-pref \
-                -font -Adobe-Times-Medium-R-Normal-*-180-* \
+        $w.top.record tag configure marc-pref -font $font(n,normal) \
                 -foreground blue
-        $w.top.record tag configure marc-text \
-                -font -Adobe-Times-Medium-R-Normal-*-180-* \
+        $w.top.record tag configure marc-text -font $font(n,normal) \
                 -foreground black
-        $w.top.record tag configure marc-it \
-                -font -Adobe-Times-Medium-I-Normal-*-180-* \
+        $w.top.record tag configure marc-it -font $font(n,normal) \
                 -foreground black
 
         pack $w.top.s -side right -fill y
@@ -892,7 +1210,7 @@ proc popup-marc {sno no b df} {
                 {Duplicate} {}] 0
         menubutton $w.bot.formats -text "Format" -menu $w.bot.formats.m \
                 -relief raised
-        menu $w.bot.formats.m
+        irmenu $w.bot.formats.m
         pack $w.bot.formats -expand yes -ipadx 2 -ipady 2 \
                 -padx 3 -pady 3 -side left
     } else {
@@ -930,6 +1248,12 @@ proc popup-marc {sno no b df} {
     $ffunc $sno $no $w.top.record 0
 }
 
+# Procedure update-target-hotlist {target base}
+#  target     current target name
+#  base       current database name
+# Updates the global $hotTargets so that $target and $base are
+# moved to the front, i.e. they become the number 1 target/base.
+# The target menu is updated by a call to set-target-hotlist.
 proc update-target-hotlist {target base} {
     global hotTargets
 
@@ -946,6 +1270,10 @@ proc update-target-hotlist {target base} {
     set-target-hotlist $olen
 } 
 
+# Procedure delete-target-hotlist {target}
+#  target    target to be deleted
+# Updates the global $hotTargets so that $target is removed.
+# The target menu is updated by a call to set-target-hotlist.
 proc delete-target-hotlist {target} {
     global hotTargets
 
@@ -960,12 +1288,16 @@ proc delete-target-hotlist {target} {
     set-target-hotlist $olen
 }
 
+# Procedure set-target-hotlist {olen}
+#  olen     number of hot target entries to be deleted from menu
+# Updates the target menu with the targets with the first 8 entries
+# in the $hotTargets global.
 proc set-target-hotlist {olen} {
     global hotTargets
    
     if {$olen > 0} {
         if {[tk4]} {
-            .top.target.m delete 7 [expr 7+$olen]
+            .top.target.m delete 6 [expr 6+$olen]
         } else {
             .top.target.m delete 6 [expr 6+$olen]
         }
@@ -974,7 +1306,7 @@ proc set-target-hotlist {olen} {
     foreach e $hotTargets {
         set target [lindex $e 0]
         set base [lindex $e 1]
-        if {$base == ""} {
+        if {![string length $base]} {
             .top.target.m add command -label "$i $target" -command \
                 [list reopen-target $target {}]
         } else {
@@ -988,36 +1320,50 @@ proc set-target-hotlist {olen} {
     }
 }
 
+# Procedure reopen-target {target base}
+#  target    target to be opened
+#  base      base to be used
+# Closes connection with current target and opens a new connection
+# with $target and database $base.
 proc reopen-target {target base} {
     close-target
     open-target $target $base
     update-target-hotlist $target $base
 }
 
+# Procedure define-target-action
+# Prepares the setup of a new target. The name of the target
+# is read from the dialog .target-define dialog (procedure
+# define-target-dialog) and the target definition window is displayed by
+# a call to protocol-setup.
 proc define-target-action {} {
     global profile
     
     set target [.target-define.top.target.entry get]
-    if {$target == ""} {
+    if {![string length $target]} {
         return
     }
-    foreach n [array names profile] {
-        if {$n == $target} {
+    foreach n [array names profile *,host] {
+        if {![string compare $n ${target},host]} {
             destroy .target-define
             protocol-setup $n
             return
         }
     }
-    set seq [lindex $profile(Default) 12]
-    dputs "seq=${seq}"
-    dputs $profile(Default)
-    set profile($target) $profile(Default)
-    set profile(Default) [lreplace $profile(Default) 12 12 [incr seq]]
-   
+    foreach n [array names profile Default,*] {
+	set profile($target,[string range $n 8 end]) $profile($n)
+
+    }
+    incr profile(Default,windowNumber)
+    
     protocol-setup $target
     destroy .target-define
 }
 
+# Procedure fail-response {target}
+#  target   current target
+# Error handler (IrTcl failback) that takes care of serious protocol
+# errors, connection lost, etc.
 proc fail-response {target} {
     global debugMode
 
@@ -1031,65 +1377,68 @@ proc fail-response {target} {
     tkerror "$m ($c)"
 }
 
+# Procedure connect-response {target base}
+#  target   current target
+#  base     current database
+# IrTcl connect response handler.
 proc connect-response {target base} {
     dputs "connect-response"
-    show-target $target $base
-    init-request
+    init-request $target $base
 }
 
+# Procedure open-target {target base}
+#  target   target to be opened
+#  base     database to be used
+# Opens a new connection with $target/$base.
 proc open-target {target base} {
     global profile
     global hostid
     global presentChunk
 
     z39 disconnect
-    z39 comstack [lindex $profile($target) 6]
-    z39 protocol [lindex $profile($target) 11]
-    z39 idAuthentication [lindex $profile($target) 3]
-    z39 maximumRecordSize [lindex $profile($target) 4]
-    z39 preferredMessageSize [lindex $profile($target) 5]
-    dputs "maximumRecordSize="
-    dputs [z39 maximumRecordSize]
-    dputs "preferredMessageSize="
-    dputs [z39 preferredMessageSize]
+    z39 comstack $profile($target,comstack)
+    z39 protocol $profile($target,protocol)
+    eval z39 idAuthentication $profile($target,authentication)
+    z39 maximumRecordSize $profile($target,maximumRecordSize)
+    z39 preferredMessageSize $profile($target,preferredMessageSize)
+    dputs "maximumRecordSize=[z39 maximumRecordSize]"
+    dputs "preferredMessageSize=[z39 preferredMessageSize]"
     show-status Connecting 1 0
-    if {$base == ""} {
-        z39 databaseNames [lindex [lindex $profile($target) 7] 0]
-    } else {
-        z39 databaseNames $base
-    }
-    set x [lindex $profile($target) 13]
-    if {$x == ""} {
+    set x $profile($target,largeSetLowerBound)
+    if {![string length $x]} {
         set x 2
     }
     z39 largeSetLowerBound $x
-
-    set x [lindex $profile($target) 14]
-    if {$x == ""} {
+    
+    set x $profile($target,smallSetUpperBound)
+    if {![string length $x]} {
         set x 0
     }
     z39 smallSetUpperBound $x
-
-    set x [lindex $profile($target) 15]
-    if {$x == ""} {
+    
+    set x $profile($target,mediumSetPresentNumber)
+    if {![string length $x]} {
         set x 0
     }
     z39 mediumSetPresentNumber $x
 
-    set presentChunk [lindex $profile($target) 16]
-    if {$presentChunk == ""} {
+    set presentChunk $profile($target,presentChunk)
+    if {![string length $presentChunk]} {
         set presentChunk 4
     }
 
     z39 failback [list fail-response $target]
     z39 callback [list connect-response $target $base]
+    show-target $target $base
     update idletasks
     set err [catch {
-        z39 connect [lindex $profile($target) 1]:[lindex $profile($target) 2]
+        z39 connect $profile($target,host):$profile($target,port)
         } errorMessage]
     if {$err} {
+        set hostid Default
         tkerror $errorMessage
         show-status "Not connected" 0 {}
+        show-target {} {}
         return
     }
     set hostid $target
@@ -1098,6 +1447,8 @@ proc open-target {target base} {
     configure-enable-e .top.target.m 2
 }
 
+# Procedure close-target
+# Shuts down the connection with current target.
 proc close-target {} {
     global hostid
     global cancelFlag
@@ -1117,7 +1468,7 @@ proc close-target {} {
     configure-disable-e .top.target.m 1
     configure-disable-e .top.target.m 2
     if {[tk4]} {
-        .top.rset.m delete 2 last
+        .top.rset.m delete 1 last
     } else {
         .top.rset.m delete 1 last
     }
@@ -1125,6 +1476,9 @@ proc close-target {} {
     configure-enable-e .top.target.m 0
 }
 
+# Procedure load-set-action
+# Loads records from a file. The filename is read from the entry
+# .load-set.filename.entry (see function load-set)
 proc load-set-action {} {
     global setNoLast
 
@@ -1147,6 +1501,9 @@ proc load-set-action {} {
     show-status Ready 0 {}
 }
 
+# Procedure load-set
+# Dialog that asks for a filename with records to be loaded
+# into a result set.
 proc load-set {} {
     set w .load-set
     toplevel $w
@@ -1165,14 +1522,17 @@ proc load-set {} {
     focus $oldFocus
 }
 
-proc init-request {} {
+# Procedure init-request
+# Sends an initialize request to the target. This procedure is called
+# when a connect has been established.
+proc init-request {target base} {
     global cancelFlag
 
     if {$cancelFlag} {
         close-target
         return
     }
-    z39 callback {init-response}
+    z39 callback [list init-response $target $base]
     show-status Initializing 1 {}
     set err [catch {z39 init} errorMessage]
     if {$err} {
@@ -1181,31 +1541,92 @@ proc init-request {} {
     }
 }
 
-proc init-response {} {
-    global cancelFlag
-    global scanEnable
+# Procedure init-response
+# Handles and incoming init-response. The service buttons
+# are enabled. The global $scanEnable indicates whether the target
+# supports scan.
+proc init-response {target base} {
+    global cancelFlag profile scanEnable settingsChanged
 
-    dputs {init-reponse}
+    dputs {init-response}
     apduDump
     if {$cancelFlag} {
         close-target
         return
     }
     if {![z39 initResult]} {
-        show-status Ready 0 1
         set u [z39 userInformationField]
         close-target
         tkerror "Connection rejected by target: $u"
     } else {
-        if {[lsearch [z39 options] scan] >= 0} {
-            set scanEnable 1
-        } else {
-            set scanEnable 0
-        }
-        show-status Ready 0 1
+	z39 failback [list explain-crash $target $base]
+        explain-check $target [list ready-response $base]
     }
 }
 
+# Procedure explain-crash
+# Handles target that dies during explain.
+proc explain-crash {target base} {
+    global profile settingsChanged
+    
+    set profile($target,timeLastInit) [clock seconds]
+    set profile($target,timeLastExplain) {}
+    set settingsChanged 1
+
+    show-message {}
+    open-target $target $base
+}
+
+# Procedure explain-check 
+# Stub function to check explain. May be overwritten later.
+proc explain-check {target response} {
+    eval $response [list $target]
+}
+
+# Procedure ready-response
+# Called after a target has been initialized and, possibly, explained
+proc ready-response {base target} {
+    global profile settingsChanged scanEnable
+    
+    z39 failback [list fail-response $target]
+    if {[string length $base]} {
+	set profile($target,timeLastInit) [clock seconds]
+	set settingsChanged 1
+
+	z39 databaseNames $base
+	cascade-dblist $target $base
+	show-target $target $base
+    }
+    if {[lsearch [z39 options] scan] >= 0} {
+        set scanEnable 1
+    } else {
+        set scanEnable 0
+    }
+    .data.record delete 1.0 end
+    set desc [string trim $profile($target,description)]
+    if {[string length $desc]} {
+        .data.record insert end "$desc\n\n"
+    } else {
+        .data.record insert end "$target\n\n"
+    }
+    set data [string trim $profile($target,welcomeMessage)]
+    if {[string length $data]} {
+	.data.record insert end "Welcome Message:\n$data\n\n"
+    }
+    set data [string trim $profile($target,recentNews)]
+    if {[string length $data]} {
+        .data.record insert end "News:\n$data\n"
+    }
+    show-message {}
+    show-status Ready 0 1
+}
+
+# Procedure search-request
+#  bflag     flag to indicate if this procedure calls itself
+# Performs a search. If $busy is 1, the search-request is performed
+# at a later time (when another response arrives). This procedure
+# sets many search-related Z39-settings. The global $setNo is set
+# to the result set number (z39.$setNo).
 proc search-request {bflag} {
     global setNo
     global setNoLast
@@ -1218,8 +1639,8 @@ proc search-request {bflag} {
     global elementSetNames
 
     set target $hostid
-
-    if {[z39 connect] == ""} {
+    
+    if {![string length [z39 connect]]} {
         return
     }
     dputs "search-request"
@@ -1237,34 +1658,33 @@ proc search-request {bflag} {
     set delayRequest {} 
 
     set query [index-query]
-    if {$query==""} {
+    if {![string length $query]} {
         return
     }
     incr setNoLast
     set setNo $setNoLast
     ir-set z39.$setNo z39
-
-    if {[lindex $profile($target) 10] == 1} {
+    
+    if {$profile($target,namedResultSets)} {
         z39.$setNo setName $setNo
         dputs "setName=${setNo}"
     } else {
-        z39.$setNo setName Default
-        dputs "setName=Default"
-    }
-    if {[lindex $profile($target) 8] == 1} {
-        z39.$setNo queryType rpn
+        z39.$setNo setName default
+        dputs "setName=default"
     }
-    if {[lindex $profile($target) 9] == 1} {
-        z39.$setNo queryType ccl
+    if {$profile($target,queryRPN)} {
+	z39.$setNo queryType rpn
+    } elseif {$profile($target,queryCCL)} {
+	z39.$setNo queryType ccl
     }
     dputs Setting
     dputs $recordSyntax
-    if {$recordSyntax == "None" } {
+    if {![string compare $recordSyntax None]} {
         z39.$setNo preferredRecordSyntax {}
     } else {
         z39.$setNo preferredRecordSyntax $recordSyntax
     }
-    if {$elementSetNames == "None" } {
+    if {![string compare $elementSetNames None]} {
         z39.$setNo elementSetNames {}
         z39.$setNo smallSetElementSetNames {}
         z39.$setNo mediumSetElementSetNames {}
@@ -1278,6 +1698,11 @@ proc search-request {bflag} {
     show-status Searching 1 0
 }
 
+# Procedure scan-copy {y entry}
+#  y       y-position of mouse pointer
+#  entry   a search entry in the top
+# Copies the term in the list nearest $y to the query entry specified
+# by $entry
 proc scan-copy {y entry} {
     set w .scan-window
     set no [$w.top.list nearest $y]
@@ -1286,6 +1711,9 @@ proc scan-copy {y entry} {
     .lines.$entry.e insert 0 [string range [$w.top.list get $no] 8 end]
 }
 
+# Procedure scan-request
+# Performs a scan on term "0" with the current attributes in entry
+# specified by the global $curIndexEntry.
 proc scan-request {} {
     set w .scan-window
 
@@ -1355,6 +1783,11 @@ proc scan-request {} {
     show-status Scanning 1 0
 }
 
+# Procedure scan-term-h {attr} 
+# attr    attribute specification
+# This procedure is called whenever a key is released in the entry in the
+# scan window (.scan-window). A scan is then initiated with the new contents
+# of the entry as the starting term.
 proc scan-term-h {attr} {
     global busy
     global scanTerm
@@ -1372,7 +1805,7 @@ proc scan-term-h {attr} {
     z39.scan numberOfTermsRequested 5
     z39.scan preferredPositionInResponse 1
     dputs "${attr} \{${scanTerm}\}"
-    if {$scanTerm == ""} {
+    if {![string length $scanTerm]} {
         z39.scan scan "${attr} 0"
     } else {
         z39.scan scan "${attr} \{${scanTerm}\}"
@@ -1380,6 +1813,16 @@ proc scan-term-h {attr} {
     show-status Scanning 1 0
 }
 
+# Procedure scan-response {attr start toget}
+#  attr   attribute specification
+#  start  position of first term in the response
+#  toget  number of total terms to get
+# This procedure handles all scan-responses. $start specifies the list
+# entry number of the first incoming term. The $toget indicates the total
+# number of terms to be retrieved from the target. The $toget may be
+# negative in which case, scan is performed 'backwards' (- $toget is
+# the total number of terms in this case). This procedure usually calls
+# itself several times in order to get small scan-term-list chunks.
 proc scan-response {attr start toget} {
     global cancelFlag
     global delayRequest
@@ -1414,7 +1857,7 @@ proc scan-response {attr start toget} {
         z39.scan preferredPositionInResponse 1
         set scanTerm $nScanTerm
         dputs "${attr} \{${scanTerm}\}"
-        if {$scanTerm == ""} {
+        if {![string length $scanTerm]} {
             z39.scan scan "${attr} 0"
         } else {
             z39.scan scan "${attr} \{${scanTerm}\}"
@@ -1490,6 +1933,11 @@ proc scan-response {attr start toget} {
     show-status Ready 0 1
 }
 
+# Procedure scan-down {attr}
+#  attr   attribute specification
+# This procedure is called when the user hits the Down button the scan
+# window. A new scan is initiated with a positive $toget passed to the
+# scan-response handler.
 proc scan-down {attr} {
     global scanView
     global cancelFlag
@@ -1521,6 +1969,11 @@ proc scan-down {attr} {
     $w.top.list yview $scanView
 }
 
+# Procedure scan-up {attr}
+#  attr   attribute specification
+# This procedure is called when the user hits the Up button the scan
+# window. A new scan is initiated with a negative $toget passed to the
+# scan-response handler.
 proc scan-up {attr} {
     global scanView
     global cancelFlag
@@ -1550,6 +2003,13 @@ proc scan-up {attr} {
     $w.top.list yview $scanView
 }
 
+# Procedure search-response
+# This procedure handles search-responses. If the search is successful
+# this procedure will try to retrieve a total of 50 records from the target;
+# however not more than $presentChunk records at a time. This procedure
+# affects the following globals:
+#   $setOffset        current record position offset
+#   $setMax           total number of records to be retrieved
 proc search-response {} {
     global setNo
     global setOffset
@@ -1575,7 +2035,7 @@ proc search-response {} {
     set setMax [z39.$setNo resultCount]
     show-status Ready 0 1
     set status [z39.$setNo responseStatus]
-    if {[lindex $status 0] == "NSD"} {
+    if {![string compare [lindex $status 0] NSD]} {
         z39.$setNo nextResultSetPosition 0
         set code [lindex $status 1]
         set msg [lindex $status 2]
@@ -1591,9 +2051,9 @@ proc search-response {} {
     show-status Ready 0 1
     set l [format "%-4d %7d" $setNo $setMax]
     .top.rset.m add command -label $l \
-            -command [list add-title-lines $setNo 10000 1]
-    if {$setMax > 20} {
-        set setMax 20
+            -command [list recall-set $setNo]
+    if {$setMax > 50} {
+        set setMax 50
     }
     set no [z39.$setNo numberOfRecordsReturned]
     dputs "Returned $no records, setOffset $setOffset"
@@ -1613,6 +2073,13 @@ proc search-response {} {
     }
 }
 
+# Procedure present-more {number}
+#  number      number of records to be retrieved
+# This procedure starts a present-request. The $number variable indicates
+# the total number of records to be retrieved. The global $presentChunk
+# specifies the number of records to be retrieved at a time. If $number
+# is the empty string all remaining records in the result set are 
+# retrieved.
 proc present-more {number} {
     global setNo
     global setOffset
@@ -1644,7 +2111,7 @@ proc present-more {number} {
         show-status Ready 0 1
         return
     }
-    if {$number == ""} {
+    if {![string length $number]} {
         set setMax $max
     } else {
         incr setMax $number
@@ -1653,7 +2120,7 @@ proc present-more {number} {
         }
     }
     z39 callback {present-response}
-
+    
     set toGet [expr $setMax - $setOffset + 1]
     if {$toGet <= 0} {
         return
@@ -1665,10 +2132,25 @@ proc present-more {number} {
     show-status Retrieving 1 0
 }
 
+# Procedure init-title-lines 
+# Utility that cleans the main record window.
 proc init-title-lines {} {
-    .data.record delete 0.0 end
+    .data.record delete 1.0 end
+}
+
+# Procedure recall-set {setno}
+#  setno    Set number to recall
+proc recall-set {setno} {
+    add-title-lines $setno 10000 1
 }
 
+# Procedure add-title-lines {setno no offset}
+#  setno    Set number
+#  no       Number of records
+#  offset   Starting offset
+# This procedure displays the records $offset .. $offset+$no-1 in result
+# set $setno in the main record window by using the display format in the
+# global $displayFormat
 proc add-title-lines {setno no offset} {
     global displayFormats
     global displayFormat
@@ -1682,9 +2164,8 @@ proc add-title-lines {setno no offset} {
         set setno $setNo
     }
     if {$offset == 1} {
-        
         .bot.a.set configure -text $setno
-        .data.record delete 0.0 end
+        .data.record delete 1.0 end
     }
     set ffunc [lindex $displayFormats $displayFormat]
     dputs "ffunc=$ffunc"
@@ -1692,7 +2173,7 @@ proc add-title-lines {setno no offset} {
     for {set i 0} {$i < $no} {incr i} {
         set o [expr $i + $offset]
         set type [z39.$setno type $o]
-        if {$type == ""} {
+        if {![string length $type]} {
             dputs "no more at $o"
             break
         }
@@ -1710,6 +2191,10 @@ proc add-title-lines {setno no offset} {
     }
 }
 
+# Procedure present-response
+# Present-response handler. The incoming records are displayed and a new
+# present request is performed until all records ($setMax) is returned
+# from the target.
 proc present-response {} {
     global setNo
     global setOffset
@@ -1733,7 +2218,7 @@ proc present-response {} {
         return
     }
     set status [z39.$setNo responseStatus]
-    if {[lindex $status 0] == "NSD"} {
+    if {![string compare [lindex $status 0] NSD]} {
         show-status Ready 0 1
         set code [lindex $status 1]
         set msg [lindex $status 2]
@@ -1753,6 +2238,9 @@ proc present-response {} {
     }
 }
 
+# Procedure left-cursor {w}
+#  w    entry widget
+# Tries to move the cursor left in entry window $w
 proc left-cursor {w} {
     set i [$w index insert]
     if {$i > 0} {
@@ -1762,6 +2250,9 @@ proc left-cursor {w} {
     dputs left
 }
 
+# Procedure right-cursor {w}
+#  w    entry widget
+# Tries to move the cursor right in entry window $w
 proc right-cursor {w} {
     set i [$w index insert]
     incr i
@@ -1769,6 +2260,12 @@ proc right-cursor {w} {
     $w icursor $i
 }
 
+# Procedure bind-fields {list returnAction escapeAction}
+#  list          list of entry widgets
+#  returnAction  return script
+#  escapeAction  escape script
+# Each widget in list are assigned bindings for <Tab>, <Left>, <Right>,
+# <Return> and <Escape>.
 proc bind-fields {list returnAction escapeAction} {
     set max [expr [llength $list]-1]
     for {set i 0} {$i < $max} {incr i} {
@@ -1793,6 +2290,12 @@ proc bind-fields {list returnAction escapeAction} {
     focus [lindex $list 0]
 }
 
+# Procedure entry-fields {parent list tlist returnAction escapeAction}
+#  list          list of frame widgets
+#  tlist         list of text to be used as lead of each entry
+#  returnAction  return script
+#  escapeAction  escape script
+# Makes label and entry widgets in each widget in $list.
 proc entry-fields {parent list tlist returnAction escapeAction} {
     set alist {}
     set i 0
@@ -1809,6 +2312,8 @@ proc entry-fields {parent list tlist returnAction escapeAction} {
     bind-fields $alist $returnAction $escapeAction
 }
 
+# Procedure define-target-dialog
+# Dialog that asks for new target to be defined.
 proc define-target-dialog {} {
     set w .target-define
 
@@ -1824,69 +2329,65 @@ proc define-target-dialog {} {
     top-down-ok-cancel $w {define-target-action} 1
 }
 
+# Procedure protocol-setup-delete
+# This procedure is invoked when the user tries to delete a target
+# definition. If user is sure, the target definition is deleted.
 proc protocol-setup-delete {target w} {
-    global profile
-    global settingsChanged
+    global profile settingsChanged
 
     set a [alert "Are you sure you want to delete the target \
 definition $target ?"]
     if {$a} {
         destroy $w
-        unset profile($target)
+	foreach n [array names profile $target,*] {
+	    unset profile($n)
+	}
         set settingsChanged 1
         cascade-target-list
         delete-target-hotlist $target
     }
 }
 
+# Procedure protocol-setup-action {target w}
+# target     target to be defined
+# w          target definition toplevel widget
+# This procedure reads all appropriate globals and makes a new/modified
+# profile for the target. The global array $profileS contains most of the
+# information the user may modify.
 proc protocol-setup-action {target w} {
-    global profile
-    global settingsChanged
-    global targetS
+    global profile settingsChanged profileS
 
     set dataBases {}
     set settingsChanged 1
+
+    puts "protocol-setup-action"
+    set timedef $profile($target,timeDefine)
+    if {![string length $timedef]} {
+        set timedef [clock seconds]
+    }
+    set profileS($target,timeDefine) $timedef
+
+    foreach n [array names profile $target,*] {
+	set profile($n) $profileS($n)
+	unset profileS($n)
+    }
+
     set len [$w.top.databases.list size]
+    catch {unset profile($target,databases)}
     for {set i 0} {$i < $len} {incr i} {
-        lappend dataBases [$w.top.databases.list get $i]
-    }
-    set wno [lindex $profile($target) 12]
-
-    set profile($target) [list [$w.top.description.entry get] \
-            [$w.top.host.entry get] \
-            [$w.top.port.entry get] \
-            [$w.top.idAuthentication.entry get] \
-            $targetS($target,MRS) \
-            $targetS($target,PMS) \
-            $targetS($target,csType) \
-            $dataBases \
-            $targetS($target,RPN) \
-            $targetS($target,CCL) \
-            $targetS($target,ResultSets) \
-            $targetS($target,protocolType) \
-            $wno \
-            $targetS($target,LSLB) \
-            $targetS($target,SSUB) \
-            $targetS($target,MSPN) \
-            $targetS($target,presentChunk) ]
+	lappend profile($target,databases) [$w.top.databases.list get $i]
+    }
 
     cascade-target-list
     delete-target-hotlist $target
-    dputs $profile($target)
     destroy $w
 }
 
-proc place-force {window parent} {
-    set g [wm geometry $parent]
-
-    set p1 [string first + $g]
-    set p2 [string last + $g]
-
-    set x [expr 40+[string range $g [expr $p1 +1] [expr $p2 -1]]]
-    set y [expr 60+[string range $g [expr $p2 +1] end]]
-    wm geometry $window +${x}+${y}
-}
-
+# Procedure add-database-action {target w}
+#  target      target to be defined
+#  w           top level widget for the target definition
+# Adds the contents of .database-select.top.database.entry to list of
+# databases.
 proc add-database-action {target w} {
     global profile
 
@@ -1895,6 +2396,10 @@ proc add-database-action {target w} {
     destroy .database-select
 }
 
+# Procedure add-database {target wp}
+#  target      target to be defined
+#  wp          top level widget for the target definition
+# Makes a dialog in which the user enters new database
 proc add-database {target wp} {
     global profile
 
@@ -1918,6 +2423,12 @@ proc add-database {target wp} {
     focus $oldFocus
 }
 
+
+# Procedure delete-database {target w}
+#  target     target to be defined
+#  w          top level widget for the target definition
+# Asks the user if he/she really wishes to delete a database and removes
+# the database from the database-list if requested.
 proc delete-database {target w} {
     global profile
 
@@ -1935,9 +2446,13 @@ proc delete-database {target w} {
     }
 }
 
+# Procedure protocol-setup {target}
+#  target     target to be defined
+# Makes a dialog in which the user may modify/view a target definition
+# (profile). The $profileS - array holds the initial definition of the
+# target.
 proc protocol-setup {target} {
-    global profile
-    global targetS
+    global profile profileS
     
     set bno 0
     while {[winfo exists .setup-$bno]} {
@@ -1951,16 +2466,18 @@ proc protocol-setup {target} {
 
     top-down-window $w
     
-    if {$target == ""} {
+    if {![string length $target]} {
         set target Default
     }
-    dputs target
-    dputs $profile($target)
+    foreach n [array names profile $target,*] {
+	set profileS($n) $profile($n)
+    }
 
     frame $w.top.description
     frame $w.top.host
     frame $w.top.port
     frame $w.top.idAuthentication
+
     frame $w.top.cs-type -relief ridge -border 2
     frame $w.top.protocol -relief ridge -border 2
     frame $w.top.query -relief ridge -border 2
@@ -1979,24 +2496,15 @@ proc protocol-setup {target} {
         bind $w.top.$sub.entry <Control-a> [list add-database $target $w]
         bind $w.top.$sub.entry <Control-d> [list delete-database $target $w]
     }
-    $w.top.description.entry insert 0 [lindex $profile($target) 0]
-    $w.top.host.entry insert 0 [lindex $profile($target) 1]
-    $w.top.port.entry insert 0 [lindex $profile($target) 2]
-    $w.top.idAuthentication.entry insert 0 [lindex $profile($target) 3]
-    set targetS($target,csType) [lindex $profile($target) 6]
-    set targetS($target,RPN) [lindex $profile($target) 8]
-    set targetS($target,CCL) [lindex $profile($target) 9]
-    set targetS($target,ResultSets) [lindex $profile($target) 10]
-    set targetS($target,protocolType) [lindex $profile($target) 11]
-    if {$targetS($target,protocolType) == ""} {
-        set targetS($target,protocolType) Z39
-    }
-    set targetS($target,LSLB) [lindex $profile($target) 13]
-    set targetS($target,SSUB) [lindex $profile($target) 14]
-    set targetS($target,MSPN) [lindex $profile($target) 15]
-    set targetS($target,presentChunk) [lindex $profile($target) 16]
-    set targetS($target,MRS) [lindex $profile($target) 4]
-    set targetS($target,PMS) [lindex $profile($target) 5]
+    $w.top.description.entry configure -textvariable \
+	profileS($target,description)
+    $w.top.host.entry configure -textvariable \
+	profileS($target,host)
+    $w.top.port.entry configure -textvariable \
+	profileS($target,port)
+    $w.top.idAuthentication.entry configure -textvariable \
+	profileS($target,authentication)
+
     # Databases ....
     pack $w.top.databases -side left -pady 2 -padx 2 -expand yes -fill both
 
@@ -2023,18 +2531,19 @@ proc protocol-setup {target} {
             -padx 2 -pady 2
     $w.top.databases.scroll config -command "$w.top.databases.list yview"
 
-    foreach b [lindex $profile($target) 7] {
-        $w.top.databases.list insert end $b
+    if {[info exists profile($target,databases)]} {
+	foreach b $profile($target,databases) {
+	    $w.top.databases.list insert end $b
+	}
     }
-
     # Transport ...
     pack $w.top.cs-type -pady 2 -padx 2 -side top -fill x
     
     label $w.top.cs-type.label -text "Transport" 
     radiobutton $w.top.cs-type.tcpip -text "TCP/IP" -anchor w \
-            -variable targetS($target,csType) -value tcpip
+            -variable profileS($target,comstack) -value tcpip
     radiobutton $w.top.cs-type.mosi -text "MOSI" -anchor w\
-            -variable targetS($target,csType) -value mosi
+            -variable profileS($target,comstack) -value mosi
     
     pack $w.top.cs-type.label $w.top.cs-type.tcpip $w.top.cs-type.mosi \
             -padx 2 -side top -fill x
@@ -2044,9 +2553,9 @@ proc protocol-setup {target} {
     
     label $w.top.protocol.label -text "Protocol" 
     radiobutton $w.top.protocol.z39v2 -text "Z39.50" -anchor w \
-            -variable targetS($target,protocolType) -value Z39
+            -variable profileS($target,protocol) -value Z39
     radiobutton $w.top.protocol.sr -text "SR" -anchor w \
-            -variable targetS($target,protocolType) -value SR
+            -variable profileS($target,protocol) -value SR
     
     pack $w.top.protocol.label $w.top.protocol.z39v2 $w.top.protocol.sr \
             -padx 2 -side top -fill x
@@ -2056,11 +2565,11 @@ proc protocol-setup {target} {
 
     label $w.top.query.label -text "Query support"
     checkbutton $w.top.query.c1 -text "RPN query" -anchor w \
-            -variable targetS($target,RPN)
+            -variable profileS($target,queryRPN)
     checkbutton $w.top.query.c2 -text "CCL query" -anchor w \
-            -variable targetS($target,CCL)
+            -variable profileS($target,queryCCL)
     checkbutton $w.top.query.c3 -text "Result sets" -anchor w \
-            -variable targetS($target,ResultSets)
+            -variable profileS($target,namedResultSets)
 
     pack $w.top.query.label -side top 
     pack $w.top.query.c1 $w.top.query.c2 $w.top.query.c3 \
@@ -2073,10 +2582,14 @@ proc protocol-setup {target} {
             {Cancel} [list destroy $w]] 0   
 }
 
-
+# Procedure advanced-setup {target b}
+#  target     target to be defined
+#  b          window number of target top level
+# Makes a dialog in which the user may modify/view advanced settings
+# of a target definition (profile).
 proc advanced-setup {target b} {
     global profile
-    global targetS
+    global profileS
 
     set w .advanced-setup-$b
     
@@ -2086,7 +2599,7 @@ proc advanced-setup {target b} {
     
     top-down-window $w
     
-    if {$target == ""} {
+    if {![string length $target]} {
         set target Default
     }
     dputs target
@@ -2111,32 +2624,46 @@ proc advanced-setup {target b} {
             {Maximum Record Size:} {Preferred Message Size:}} \
             [list advanced-setup-action $target $b] [list destroy $w]
 
-    $w.top.largeSetLowerBound.entry insert 0 $targetS($target,LSLB)
-    $w.top.smallSetUpperBound.entry insert 0 $targetS($target,SSUB)
-    $w.top.mediumSetPresentNumber.entry insert 0 $targetS($target,MSPN)
-    $w.top.presentChunk.entry insert 0 $targetS($target,presentChunk)
-    $w.top.maximumRecordSize.entry insert 0 $targetS($target,MRS)
-    $w.top.preferredMessageSize.entry insert 0 $targetS($target,PMS)
+    $w.top.largeSetLowerBound.entry configure -textvariable \
+	profileS($target,largeSetLowerBound)
+    $w.top.smallSetUpperBound.entry configure -textvariable \
+	profileS($target,smallSetUpperBound)
+    $w.top.mediumSetPresentNumber.entry configure -textvariable \
+	profileS($target,mediumSetPresentNumber)
+    $w.top.presentChunk.entry configure -textvariable \
+	profileS($target,presentChunk)
+    $w.top.maximumRecordSize.entry configure -textvariable \
+	profileS($target,maximumRecordSize)
+    $w.top.preferredMessageSize.entry configure -textvariable \
+	profileS($target,preferredMessageSize)
     
     bottom-buttons $w [list {Ok} [list advanced-setup-action $target $b] \
             {Cancel} [list destroy $w]] 0   
 }
 
+# Procedure advanced-setup-action {target b}
+#  target     target to be defined
+#  b          window number of target top level
+# This procedure is called when the user hits Ok in the advanced target
+# setup dialog. The temporary result is stored in the $profileS - array.
 proc advanced-setup-action {target b} {
     set w .advanced-setup-$b
-    global targetS
+    global profileS
     
-    set targetS($target,LSLB) [$w.top.largeSetLowerBound.entry get]
-    set targetS($target,SSUB) [$w.top.smallSetUpperBound.entry get]
-    set targetS($target,MSPN) [$w.top.mediumSetPresentNumber.entry get]
-    set targetS($target,presentChunk) [$w.top.presentChunk.entry get]
-    set targetS($target,MRS) [$w.top.maximumRecordSize.entry get]
-    set targetS($target,PMS) [$w.top.preferredMessageSize.entry get]
+    set profileS($target,LSLB) [$w.top.largeSetLowerBound.entry get]
+    set profileS($target,SSUB) [$w.top.smallSetUpperBound.entry get]
+    set profileS($target,MSPN) [$w.top.mediumSetPresentNumber.entry get]
+    set profileS($target,presentChunk) [$w.top.presentChunk.entry get]
+    set profileS($target,MRS) [$w.top.maximumRecordSize.entry get]
+    set profileS($target,PMS) [$w.top.preferredMessageSize.entry get]
 
     dputs "advanced-setup-action"
     destroy $w
 }
 
+# Procedure database-select-action
+# Called when the user commits a database select change. See procedure
+# database-select.
 proc database-select-action {} {
     set w .database-select.top
     set b {}
@@ -2149,6 +2676,8 @@ proc database-select-action {} {
     destroy .database-select
 }
 
+# Procedure database-select
+# Makes a dialog in which the user may select a database
 proc database-select {} {
     set w .database-select
     global profile
@@ -2176,13 +2705,38 @@ proc database-select {} {
             -padx 2 -pady 2
     $w.top.databases.scroll config -command "$w.top.databases.list yview"
 
-    foreach b [lindex $profile($hostid) 7] {
+    foreach b $profile($hostid,databases) {
         $w.top.databases.list insert end $b
     }
     top-down-ok-cancel $w {database-select-action} 1
     focus $oldFocus
 }
 
+# Procedure cascase-dblist-select
+proc cascade-dblist-select {target db} {
+    show-target $target $db
+    z39 databaseNames $db
+}
+
+# Procedure cascade-dblist 
+# Makes the Service/database list with proper databases for the target
+proc cascade-dblist {target base} {
+    global profile
+
+    set w .top.service.m.dblist
+    $w delete 0 200
+    if {[info exists profile($target,databases)]} {
+	foreach db $profile($target,databases) {
+	    $w add command -label $db \
+		-command [list cascade-dblist-select $target $db]
+	}
+    }
+}
+
+# Procedure cascade-target-list
+# Makes all target/databases available in the Target|Connect
+# menu as well as all targets in the Target|Setup menu.
+# This procedure is called whenever target definitions occur.
 proc cascade-target-list {} {
     global profile
     
@@ -2190,30 +2744,49 @@ proc cascade-target-list {} {
         destroy $sub
     }
     .top.target.m.clist delete 0 last
-    foreach n [lsort [array names profile]] {
-        if {$n != "Default"} {
-            set nl [lindex $profile($n) 12]
-            if {[llength [lindex $profile($n) 7]] > 1} {
-                .top.target.m.clist add cascade -label $n \
-                        -menu .top.target.m.clist.$nl
-                menu .top.target.m.clist.$nl
-                foreach b [lindex $profile($n) 7] {
-                    .top.target.m.clist.$nl add command -label $b \
-                            -command [list reopen-target $n $b]
-                }
-            } else {
-                .top.target.m.clist add command -label $n \
-                        -command [list reopen-target $n {}]
-            }
-        }
+    foreach nn [lsort [array names profile *,host]] {
+	if {[string length $profile($nn)]} {
+	    set ll [expr [string length $nn] - 6]
+	    set n [string range $nn 0 $ll]
+	    
+	    set nl $profile($n,windowNumber)
+	    if {[info exists profile($n,databases)]} {
+		set ndb [llength $profile($n,databases)]
+	    } else {
+		set ndb 0
+	    }
+	    if {$ndb > 1} {
+		.top.target.m.clist add cascade -label $n \
+		    -menu .top.target.m.clist.$nl
+		irmenu .top.target.m.clist.$nl
+		foreach b $profile($n,databases) {
+		    .top.target.m.clist.$nl add command -label $b \
+			-command [list reopen-target $n $b]
+		}
+	    } elseif {$ndb == 1} {
+		.top.target.m.clist add command -label $n -command \
+		    [list reopen-target $n [lindex $profile($n,databases) 0]]
+	    } else {
+		.top.target.m.clist add command -label $n -command \
+		    [list reopen-target $n {}]
+	    }
+	}
     }
     .top.target.m.slist delete 0 last
-    foreach n [lsort [array names profile]] {
+    foreach nn [lsort [array names profile *,host]] {
+	set ll [expr [string length $nn] - 6]
+	set n [string range $nn 0 $ll]
+	
         .top.target.m.slist add command -label $n \
                 -command [list protocol-setup $n]
     }
 }
 
+# Procedure query-select {i}
+#  i       Query type number (integer)
+# This procedure is called when the user selects a Query type. The current
+# query type information given by the globals $queryButtonsFind and
+# $queryInfoFind are affected by this operation.
 proc query-select {i} {
     global queryButtonsFind
     global queryInfoFind
@@ -2226,6 +2799,9 @@ proc query-select {i} {
     index-lines .lines 1 $queryButtonsFind $queryInfoFind activate-index
 }
 
+# Procedure query-new-action 
+# Commits a new query type definition by extending the globals
+# $queryTypes, $queryButtons and $queryInfo.
 proc query-new-action {} {
     global queryTypes
     global queryButtons
@@ -2241,6 +2817,9 @@ proc query-new-action {} {
     cascade-query-list
 }
 
+# Procedure query-new
+# Makes a dialog in which the user is requested to enter the name of a
+# new query type.
 proc query-new {} {
     set w .query-new
 
@@ -2258,6 +2837,9 @@ proc query-new {} {
     focus $oldFocus
 }
 
+# Procedure query-delete-action {queryNo}
+#  queryNo     query type number (integer)
+# Procedure that deletes the query type specified by $queryNo.
 proc query-delete-action {queryNo} {
     global queryTypes
     global queryButtons
@@ -2273,6 +2855,10 @@ proc query-delete-action {queryNo} {
     cascade-query-list
 }
 
+# Procedure query-delete {queryNo}
+#  queryNo     query type number (integer)
+# Asks if the user really want to delete a given query type; calls
+# query-delete-action if 'yes'.
 proc query-delete {queryNo} {
     global queryTypes
 
@@ -2291,6 +2877,8 @@ query type $n ?"  -aspect 300
                             {Cancel} [list destroy $w]] 1
 }
 
+# Procedure cascade-query-list
+# Updates the enties below Options|Query to list all query types.
 proc cascade-query-list {} {
     global queryTypes
     set w .top.options.m.query
@@ -2316,6 +2904,11 @@ proc cascade-query-list {} {
     }
 }
 
+# Procedure save-geometry
+# This procedure saves the per-user related settings in ~/.clientrc.tcl.
+# The geometry information stored in the global array $windowGeometry is
+# saved. Also a few other user settings, such as current display format, are
+# saved.
 proc save-geometry {} {
     global windowGeometry
     global hotTargets
@@ -2332,24 +2925,30 @@ proc save-geometry {} {
         return
     } 
     if {$hostid != "Default"} {
-        puts $f "set hostid \{$hostid\}"
+        puts $f "set hostid [list $hostid]"
         set b [z39 databaseNames]
-        puts $f "set hostbase $b"
+        puts $f "set hostbase [list $b]"
     }
-    puts $f "set hotTargets \{ $hotTargets \}"
+    puts $f "set hotTargets [list $hotTargets]"
     puts $f "set textWrap $textWrap"
     puts $f "set displayFormat $displayFormat"
     puts $f "set popupMarcdf $popupMarcdf"
     puts $f "set recordSyntax $recordSyntax"
     puts $f "set elementSetNames $elementSetNames"
     foreach n [array names windowGeometry] {
-        puts -nonewline $f "set \{windowGeometry($n)\} \{"
-        puts -nonewline $f $windowGeometry($n)
-        puts $f "\}"
+        dputs "set [list windowGeometry($n)] "
+        dputs [list $windowGeometry($n)]
+
+        puts -nonewline $f "set [list windowGeometry($n)] "
+        puts $f [list $windowGeometry($n)]
     }
     close $f
 }
 
+# Procedure save-settings
+# This procedure saves the per-host related settings irtdb.tcl which
+# is normally kept in the directory /usr/local/lib/irtcl.
+# All query types and target defintion profiles are saved.
 proc save-settings {} {
     global profile
     global libdir
@@ -2357,43 +2956,35 @@ proc save-settings {} {
     global queryTypes
     global queryButtons
     global queryInfo
-   
-    if {![file writable "${libdir}/clientrc.tcl"]} {
-        set a [alert "Cannot open ${libdir}/clientrc.tcl for writing. Do you \
-                wish to save clientrc.tcl in the current directory instead?"]
-        if {! $a} {
-            return
-        }
-        set f [open "clientrc.tcl" w]
+
+    if {[file writable "${libdir}/irtdb.tcl"]} {
+        set f [open "${libdir}/irtdb.tcl" w]
     } else {
-        set f [open "${libdir}/clientrc.tcl" w]
+        set f [open "irtdb.tcl" w]
     }
     puts $f "# Setup file"
 
-    foreach n [array names profile] {
-        puts -nonewline $f "set \{profile($n)\} \{"
-        puts -nonewline $f $profile($n)
-        puts $f "\}"
+    foreach n [lsort [array names profile]] {
+        puts $f "set [list profile($n)] [list $profile($n)]"
     }
-    puts -nonewline $f "set queryTypes \{" 
-    puts -nonewline $f $queryTypes
-    puts $f "\}"
+    puts $f "set queryTypes [list $queryTypes]"
     
-    puts -nonewline $f "set queryButtons \{" 
-    puts -nonewline $f $queryButtons
-    puts $f "\}"
+    puts $f "set queryButtons [list $queryButtons]"
     
-    puts -nonewline $f "set queryInfo \{"
-    puts -nonewline $f $queryInfo
-    puts $f "\}"
+    puts $f "set queryInfo [list $queryInfo]"
     close $f
     set settingsChanged 0
 }
 
+# Procedure alert {ask}
+#  ask    prompt string
+# Makes a grabbed dialog in which the user is requested to answer
+# "Ok" or "Cancel". This procedure returns 1 if the user hits "Ok"; 0
+# otherwise.
 proc alert {ask} {
     set w .alert
 
-    global alertAnswer
+    global alertAnswer font
 
     toplevel $w
     set oldFocus [focus]
@@ -2401,8 +2992,7 @@ proc alert {ask} {
     top-down-window $w
 
     label $w.top.warning -bitmap warning
-    message $w.top.message -text $ask -aspect 300 \
-            -font -Adobe-Times-Medium-R-Normal-*-180-*
+    message $w.top.message -text $ask -aspect 300 -font $font(b,normal)
 
     pack $w.top.warning $w.top.message -side left -pady 5 -padx 10 -expand yes
   
@@ -2412,30 +3002,48 @@ proc alert {ask} {
     return $alertAnswer
 }
 
+# Procedure alert-action
+# Called when the user hits "Ok" in the .alert-window.
 proc alert-action {} {
     global alertAnswer
     set alertAnswer 1
     destroy .alert
 }
 
+# Procedure exit-action
+# This procedure is called if the user exists the application
 proc exit-action {} {
     global settingsChanged
 
     if {$settingsChanged} {
-        set a [alert "you haven't saved your settings. Do you wish to save?"]
-        if {$a} {
-            save-settings
-        }
+        save-settings
     }
     save-geometry
     exit 0
 }
 
+# Procedure listbuttonaction {w name h user i}
+#  w       menubutton widget
+#  name    name information
+#  h       handler to be invoked
+#  user    user information to be passed to handler $h
+#  i       index passed as second argument to handler $h
+# Utility function to emulate a listbutton. Called when the user
+# Modifies the listbutton. See procedure listbuttonx.
 proc listbuttonaction {w name h user i} {
     $w configure -text [lindex $name 0]
     $h [lindex $name 1] $user $i
 }
-    
+
+# Procedure listbuttonx {button no names handle user}
+#  button  menubutton widget
+#  no      initial value index (integer)
+#  names   list of name entries. The first entry in each name
+#          entry is the actual name
+#  handle  user function to be called when the listbutton changes
+#          its value
+#  user    user argument to the $handle function
+# Makes an extended listbutton.
 proc listbuttonx {button no names handle user} {
     if {[winfo exists $button]} {
         $button configure -text [lindex [lindex $names $no] 0]
@@ -2443,7 +3051,10 @@ proc listbuttonx {button no names handle user} {
     } else {
         menubutton $button -text [lindex [lindex $names $no] 0] \
                 -width 10 -menu ${button}.m -relief raised -border 1
-        menu ${button}.m
+        irmenu ${button}.m
+        if {[tk4]} {
+            ${button}.m configure -tearoff off
+	}
     }
     set i 0
     foreach name $names {
@@ -2454,16 +3065,31 @@ proc listbuttonx {button no names handle user} {
     }
 }
 
+# Procedure listbutton {button no names}
+#  button  menubutton widget
+#  no      initial value index (integer)
+#  names   list of possible values.
+# Makes a listbutton. The functionality is emulated by the use menubutton-
+# and menu widgets.
 proc listbutton {button no names} {
     menubutton $button -text [lindex $names $no] -width 10 -menu ${button}.m \
             -relief raised -border 1
-    menu ${button}.m
+    irmenu ${button}.m
+    if {[tk4]} {
+        ${button}.m configure -tearoff off
+    }
     foreach name $names {
         ${button}.m add command -label $name \
                 -command [list ${button} configure -text $name]
     }
 }
 
+# Procedure listbuttonv-action {button var names i}
+#  button   menubutton widget
+#  var      global variable to be affected
+#  names    list of possible names and values
+# This procedure is called when the user alters a menu created by the
+# listbuttonv procedure. The global variable $var is updated.
 proc listbuttonv-action {button var names i} {
     global $var
 
@@ -2471,6 +3097,13 @@ proc listbuttonv-action {button var names i} {
     $button configure -text [lindex $names $i]
 }
 
+# Procedure listbuttonv {button var names}
+#  button   menubutton widget
+#  var      global variable to be affected
+#  names    List of name/value pairs, i.e. {n1 v1 n2 v2 ...}.
+# This procedure emulates a listbutton by means of menu/menubutton widgets.
+# The global variable $var is automatically updated and set to one of the
+# values v1, v2, ...
 proc listbuttonv {button var names} {
     global $var
 
@@ -2490,13 +3123,19 @@ proc listbuttonv {button var names} {
     }
     menubutton $button -text $n -menu ${button}.m \
             -relief raised -border 1
-    menu ${button}.m
+    irmenu ${button}.m
+    if {[tk4]} {
+        ${button}.m configure -tearoff off
+    }
     for {set i 0} {$i < $l} {incr i 2} {
         ${button}.m add command -label [lindex $names $i] \
                 -command [list listbuttonv-action $button $var $names $i]
     }
 }
 
+# Procedure query-add-index-action {queryNo}
+#  queryNo       query type number (integer)
+# Handler that makes a new query index.
 proc query-add-index-action {queryNo} {
     set w .query-setup
 
@@ -2513,6 +3152,9 @@ proc query-add-index-action {queryNo} {
     #pack $w.top.lines -side left -pady 6 -padx 6 -fill y
 }
 
+# Procedure query-add-line
+#  queryNo      query type number (integer)
+# Handler that adds new query line.
 proc query-add-line {queryNo} {
     set w .query-setup
 
@@ -2527,6 +3169,9 @@ proc query-add-line {queryNo} {
     #pack $w.top.lines -side left -pady 6 -padx 6 -fill y
 }
 
+# Procedure query-del-line
+#  queryNo      query type number (integer)
+# Handler that removes query line.
 proc query-del-line {queryNo} {
     set w .query-setup
 
@@ -2542,6 +3187,9 @@ proc query-del-line {queryNo} {
     index-lines $w.top.lines 0 $queryButtonsTmp $queryInfoTmp activate-e-index
 }
 
+# Procedure query-add-index
+#  queryNo      query type number (integer)
+# Handler that adds new query index.
 proc query-add-index {queryNo} {
     set w .query-add-index
 
@@ -2559,6 +3207,11 @@ proc query-add-index {queryNo} {
     focus $oldFocus
 }
 
+# Procedure query-setup-action
+#  queryNo      query type number (integer)
+# Handler that updates the query information database stored in the
+# globals $queryInfo and $queryButtons. This procedure is executed when
+# the user commits the query setup changes by pressing button "Ok".
 proc query-setup-action {queryNo} {
     global queryButtons
     global queryInfo
@@ -2582,6 +3235,12 @@ proc query-setup-action {queryNo} {
     index-lines .lines 1 $queryButtonsFind $queryInfoFind activate-index
 }
 
+# Procedure activate-e-index {value no i}
+#   value   menu name
+#   no      query index number
+#   i       menu index (integer)
+# Procedure called when listbutton is activated in the query type edit
+# window. The global $queryButtonsTmp is updated in this operation.
 proc activate-e-index {value no i} {
     global queryButtonsTmp
     global queryIndexTmp
@@ -2591,6 +3250,12 @@ proc activate-e-index {value no i} {
     set queryIndexTmp $i
 }
 
+# Procedure activate-index {value no i}
+#   value   menu name
+#   no      query index number
+#   i       menu index (integer)
+# Procedure called when listbutton is activated in the main query 
+# window. The global $queryButtonsFind is updated in this operation.
 proc activate-index {value no i} {
     global queryButtonsFind
 
@@ -2599,6 +3264,12 @@ proc activate-index {value no i} {
     dputs "queryButtonsFind $queryButtonsFind"
 }
 
+# Procedure update-attr
+# This procedure creates listbuttons for all bib-1 attributes except
+# the use-attribute in the .index-setup window.
+# The globals $relationTmpValue, $positionTmpValue, $structureTmpValue,
+# $truncationTmpValue and $completenessTmpValue are maintainted by the
+# listbuttons.
 proc update-attr {} {
     set w .index-setup
     listbuttonv $w.top.relation.b relationTmpValue\
@@ -2619,6 +3290,12 @@ proc update-attr {} {
             {Incomplete subfield} 1 {Complete subfield} 2 {Complete field} 3}
 }
 
+# Procedure use-attr {init}
+#  init      init flag
+# This procedure creates a listbox with several Bib-1 use attributes.
+# If $init is 1 the listbox is created with the attributes. If $init
+# is 0 the current selection of the listbox is read and the global
+# $useTmpValue is set to the current use-value.
 proc use-attr {init} {
     set attr {
         {None}                           0
@@ -2720,6 +3397,7 @@ proc use-attr {init} {
         {Host item}                    1033 
         {Content type}                 1034 
         {Anywhere}                     1035 
+        {Author-Title-Subject}         1036 
     }
     set w .index-setup
     global useTmpValue
@@ -2756,6 +3434,12 @@ proc use-attr {init} {
     }
 }
 
+# Procedure index-setup-action {oldAttr queryNo indexNo}
+#  oldAttr     original attributes (?)
+#  queryNo     query number
+#  indexNo     index number
+# Commits setup of a query index. The mapping from the index to 
+# the Bib-1 attributes are handled by this function.
 proc index-setup-action {oldAttr queryNo indexNo} {
     set attr [lindex $oldAttr 0]
 
@@ -2795,6 +3479,12 @@ proc index-setup-action {oldAttr queryNo indexNo} {
     destroy .index-setup
 }
 
+# Procedure index-setup {attr queryNo indexNo}
+#  attr        original attributes
+#  queryNo     query number
+#  indexNo     index number
+# Makes a window with settings of a given query index which the user
+# may inspect/modify.
 proc index-setup {attr queryNo indexNo} {
     set w .index-setup
 
@@ -2917,12 +3607,16 @@ proc index-setup {attr queryNo indexNo} {
 
 }
 
+# Procedure query-edit-index {queryNo}
+#  queryNo     query number
+# Determines if a selection of an index is active. If one is selected
+# the index-setup dialog is started.
 proc query-edit-index {queryNo} {
     global queryInfoTmp
     set w .query-setup
 
     set i [lindex [$w.top.index.list curselection] 0]
-    if {$i == ""} {
+    if {![string length $i]} {
         return
     }
     set attr [lindex $queryInfoTmp $i]
@@ -2930,13 +3624,17 @@ proc query-edit-index {queryNo} {
     index-setup $attr $queryNo $i
 }
 
+# Procedure query-delete-index {queryNo}
+#  queryNo     query number
+# Determines if a selection of an index is active. If one is selected
+# the index is deleted.
 proc query-delete-index {queryNo} {
     global queryInfoTmp
     global queryButtonsTmp
     set w .query-setup
 
     set i [lindex [$w.top.index.list curselection] 0]
-    if {$i == ""} {
+    if {![string length $i]} {
         return
     }
     set queryInfoTmp [lreplace $queryInfoTmp $i $i]
@@ -2944,6 +3642,9 @@ proc query-delete-index {queryNo} {
     $w.top.index.list delete $i
 }
     
+# Procedure query-setup {queryNo}
+#  queryNo     query number
+# Makes a dialog in which a query type an be customized.
 proc query-setup {queryNo} {
     set w .query-setup
 
@@ -3016,6 +3717,8 @@ proc query-setup {queryNo} {
             Cancel [list destroy $w]] 0
 }
 
+# Procedure index-clear
+# Handler that clears the search entry fields.
 proc index-clear {} {
     global queryButtonsFind
 
@@ -3025,7 +3728,18 @@ proc index-clear {} {
         incr i
     }
 }
-    
+
+# Procedure index-query
+# The purpose of this function is to read the user's query and convert
+# it to the prefix query that IrTcl/YAZ uses to represent an RPN query.
+# Each entry in a search fields takes the form
+#    [relOp][?]term[?]
+#  Here, relOp is an optional relational operator and one of:
+#      >  < >= <=  <>
+#    which sets the Bib-1 relation to greater-than, less-than, etc.
+#  The ? (question-mark) is also optional. A (?) on left-side indicates
+#    left truncation; (?) on right-side indicates right-truncation; (?)
+#    on both sides indicates both-left-and-right truncation.
 proc index-query {} {
     global queryButtonsFind
     global queryInfoFind
@@ -3102,6 +3816,12 @@ proc index-query {} {
     return $qs
 }
 
+# Procedure index-focus-in {w i}
+#  w    index frame
+#  i    index number
+# This procedure handles <FocusIn> events. A red border is drawed
+# around the active search entry field when tk3.6 is used (tk4.X
+# makes a black focus border itself).
 proc index-focus-in {w i} {
     global curIndexEntry
 
@@ -3111,6 +3831,14 @@ proc index-focus-in {w i} {
     set curIndexEntry $i
 }
 
+# Procedure index-lines {w readOp buttonInfo queryInfo handle}
+#  w          search fields entry frame
+#  realOp     if true, search-request bindings are bound to the entries.
+#  buttonInfo query type button information
+#  queryInfo  query type field information
+#  handle     handler called a when a 'listbutton' changes its value
+# Makes one or more search areas - with listbuttons on the left
+# and entries on the right. 
 proc index-lines {w realOp buttonInfo queryInfo handle} {
     set i 0
     foreach b $buttonInfo {
@@ -3127,8 +3855,10 @@ proc index-lines {w realOp buttonInfo queryInfo handle} {
             if {! [winfo exists $w.$i.e]} {
                 entry $w.$i.e -width 32 -relief sunken -border 1
                 bind $w.$i.e <FocusIn> [list index-focus-in $w $i]
-                bind $w.$i.e <FocusOut> [list $w.$i configure \
-                        -background white]
+				if {![tk4]} {
+                    bind $w.$i.e <FocusOut> [list $w.$i configure \
+                          -background white]
+				}
                 pack $w.$i.l -side left
                 pack $w.$i.e -side left -fill x -expand yes
                 pack $w.$i -side top -fill x -padx 2 -pady 2
@@ -3169,6 +3899,12 @@ proc index-lines {w realOp buttonInfo queryInfo handle} {
     }
 }
 
+# Procedure search-fields {w buttondefs}
+#  w           search fields entry frame
+#  buttondefs  button definitions
+# Makes search entry fields and listbuttons. 
+# Note: This procedure is not used elsewhere. The index-lines
+#       procedure is used instead.
 proc search-fields {w buttondefs} {
     set i 0
     foreach buttondef $buttondefs {
@@ -3203,15 +3939,10 @@ proc search-fields {w buttondefs} {
     $w.0 configure -background red
 }
 
-if {[info exists windowGeometry(.)]} {
-    set g $windowGeometry(.)
-    if {$g != ""} {
-        wm geometry . $g
-    }
-}    
-
+# Init: Presentation formats are read.
 read-formats
 
+# Init: The main window is defined.
 frame .top  -border 1 -relief raised
 frame .lines  -border 1 -relief raised
 frame .mid  -border 1 -relief raised
@@ -3221,73 +3952,84 @@ pack .top .lines .mid -side top -fill x
 pack .data -side top -fill both -expand yes
 pack .bot -fill x
 
-menubutton .top.file -text "File" -menu .top.file.m
-menu .top.file.m
-.top.file.m add command -label "Save settings" -command {save-settings}
+# Init: Definition of File menu.
+menubutton .top.file -text File -menu .top.file.m
+irmenu .top.file.m
+.top.file.m add command -label {Save settings} -command {save-settings}
 .top.file.m add separator
-.top.file.m add command -label "Exit" -command {exit-action}
-
-menubutton .top.target -text "Target" -menu .top.target.m
-menu .top.target.m
-.top.target.m add cascade -label "Connect" -menu .top.target.m.clist
-.top.target.m add command -label "Disconnect" -command {close-target}
-.top.target.m add command -label "About" -command {about-target}
-.top.target.m add cascade -label "Setup" -menu .top.target.m.slist
-.top.target.m add command -label "Setup new" -command {define-target-dialog}
+.top.file.m add command -label Exit -command {exit-action}
+
+# Init: Definition of Target menu.
+menubutton .top.target -text Target -menu .top.target.m
+irmenu .top.target.m
+.top.target.m add cascade -label Connect -menu .top.target.m.clist
+.top.target.m add command -label Disconnect -command {close-target}
+.top.target.m add command -label About -command {about-target}
+.top.target.m add cascade -label Setup -menu .top.target.m.slist
+.top.target.m add command -label {Setup new} -command {define-target-dialog}
 .top.target.m add separator
 set-target-hotlist 0
 
 configure-disable-e .top.target.m 1
 configure-disable-e .top.target.m 2
 
-menu .top.target.m.clist
-menu .top.target.m.slist
+irmenu .top.target.m.clist
+irmenu .top.target.m.slist
 cascade-target-list
 
-menubutton .top.service -text "Service" -menu .top.service.m
-menu .top.service.m
-.top.service.m add command -label "Database" -command {database-select}
-.top.service.m add cascade -label "Present" -menu .top.service.m.present
-menu .top.service.m.present
-.top.service.m.present add command -label "10 More" \
-        -command [list present-more 10]
-.top.service.m.present add command -label "All" \
+# Init: Definition of Service menu.
+menubutton .top.service -text Service -menu .top.service.m
+irmenu .top.service.m
+.top.service.m add cascade -label Database -menu .top.service.m.dblist
+.top.service.m add cascade -label Present -menu .top.service.m.present
+irmenu .top.service.m.present
+.top.service.m.present add command -label {50 More} \
+        -command [list present-more 50]
+.top.service.m.present add command -label All \
         -command [list present-more {}]
-.top.service.m add command -label "Search" -command {search-request 0}
-.top.service.m add command -label "Scan" -command {scan-request}
+.top.service.m add command -label Search -command {search-request 0}
+.top.service.m add command -label Scan -command {scan-request}
+.top.service.m add command -label Explain -command \
+    {explain-refresh $hostid {ready-response {}} }
 
 .top.service configure -state disabled
 
-menubutton .top.rset -text "Set" -menu .top.rset.m
-menu .top.rset.m
-.top.rset.m add command -label "Load" -command {load-set}
+irmenu .top.service.m.dblist
+
+# Init: Definition of Set menu.
+menubutton .top.rset -text Set -menu .top.rset.m
+irmenu .top.rset.m
+.top.rset.m add command -label Load -command {load-set}
 .top.rset.m add separator
 
-menubutton .top.options -text "Options" -menu .top.options.m
-menu .top.options.m
-.top.options.m add cascade -label "Query" -menu .top.options.m.query
-.top.options.m add cascade -label "Format" -menu .top.options.m.formats
-.top.options.m add cascade -label "Wrap" -menu .top.options.m.wrap
-.top.options.m add cascade -label "Syntax" -menu .top.options.m.syntax
-.top.options.m add cascade -label "Elements" -menu .top.options.m.elements
-.top.options.m add radiobutton -label "Debug" -variable debugMode -value 1
-
-menu .top.options.m.query
-.top.options.m.query add cascade -label "Select" \
+# Init: Definition of the Options menu.
+menubutton .top.options -text Options -menu .top.options.m
+irmenu .top.options.m
+.top.options.m add cascade -label Query -menu .top.options.m.query
+.top.options.m add cascade -label Format -menu .top.options.m.formats
+.top.options.m add cascade -label Wrap -menu .top.options.m.wrap
+.top.options.m add cascade -label Syntax -menu .top.options.m.syntax
+.top.options.m add cascade -label Elements -menu .top.options.m.elements
+.top.options.m add radiobutton -label Debug -variable debugMode -value 1
+
+# Init: Definition of the Options|Query menu.
+irmenu .top.options.m.query
+.top.options.m.query add cascade -label Select \
         -menu .top.options.m.query.clist
-.top.options.m.query add cascade -label "Edit" \
+.top.options.m.query add cascade -label Edit \
         -menu .top.options.m.query.slist
-.top.options.m.query add command -label "New" \
+.top.options.m.query add command -label New \
         -command {query-new}
-.top.options.m.query add cascade -label "Delete" \
+.top.options.m.query add cascade -label Delete \
         -menu .top.options.m.query.dlist
 
-menu .top.options.m.query.slist
-menu .top.options.m.query.clist
-menu .top.options.m.query.dlist
+irmenu .top.options.m.query.slist
+irmenu .top.options.m.query.clist
+irmenu .top.options.m.query.dlist
 cascade-query-list
 
-menu .top.options.m.formats
+# Init: Definition of the Options|Formats menu.
+irmenu .top.options.m.formats
 set i 0
 foreach f $displayFormats {
     .top.options.m.formats add radiobutton -label $f -value $i \
@@ -3295,81 +4037,90 @@ foreach f $displayFormats {
     incr i
 }
 
-menu .top.options.m.wrap
-.top.options.m.wrap add radiobutton -label "Character" \
+# Init: Definition of the Options|Wrap menu.
+irmenu .top.options.m.wrap
+.top.options.m.wrap add radiobutton -label Character \
         -value char -variable textWrap -command {set-wrap char}
-.top.options.m.wrap add radiobutton -label "Word" \
+.top.options.m.wrap add radiobutton -label Word \
         -value word -variable textWrap -command {set-wrap word}
-.top.options.m.wrap add radiobutton -label "None" \
+.top.options.m.wrap add radiobutton -label None \
         -value none -variable textWrap -command {set-wrap none}
 
-menu .top.options.m.syntax
-.top.options.m.syntax add radiobutton -label "None" \
+# Init: Definition of the Options|Syntax menu.
+irmenu .top.options.m.syntax
+.top.options.m.syntax add radiobutton -label None \
         -value None -variable recordSyntax
 .top.options.m.syntax add separator
-.top.options.m.syntax add radiobutton -label "USMARC" \
+.top.options.m.syntax add radiobutton -label USMARC \
         -value USMARC -variable recordSyntax
-.top.options.m.syntax add radiobutton -label "UNIMARC" \
+.top.options.m.syntax add radiobutton -label UNIMARC \
         -value UNIMARC -variable recordSyntax
-.top.options.m.syntax add radiobutton -label "UKMARC" \
+.top.options.m.syntax add radiobutton -label UKMARC \
         -value UKMARC -variable recordSyntax
-.top.options.m.syntax add radiobutton -label "DANMARC" \
+.top.options.m.syntax add radiobutton -label DANMARC \
         -value DANMARC -variable recordSyntax
-.top.options.m.syntax add radiobutton -label "FINMARC" \
+.top.options.m.syntax add radiobutton -label FINMARC \
         -value FINMARC -variable recordSyntax
-.top.options.m.syntax add radiobutton -label "NORMARC" \
+.top.options.m.syntax add radiobutton -label NORMARC \
         -value NORMARC -variable recordSyntax
-.top.options.m.syntax add radiobutton -label "PICAMARC" \
+.top.options.m.syntax add radiobutton -label PICAMARC \
         -value PICAMARC -variable recordSyntax
 .top.options.m.syntax add separator
-.top.options.m.syntax add radiobutton -label "SUTRS" \
+.top.options.m.syntax add radiobutton -label SUTRS \
         -value SUTRS -variable recordSyntax
 .top.options.m.syntax add separator
-.top.options.m.syntax add radiobutton -label "GRS1" \
+.top.options.m.syntax add radiobutton -label GRS1 \
         -value GRS1 -variable recordSyntax
 
-menu .top.options.m.elements
-.top.options.m.elements add radiobutton -label "Unspecified" \
+# Init: Definition of the Options|Elements menu.
+irmenu .top.options.m.elements
+.top.options.m.elements add radiobutton -label Unspecified \
         -value None -variable elementSetNames
-.top.options.m.elements add radiobutton -label "Full" \
+.top.options.m.elements add radiobutton -label Full \
         -value F -variable elementSetNames
-.top.options.m.elements add radiobutton -label "Brief" \
+.top.options.m.elements add radiobutton -label Brief \
         -value B -variable elementSetNames
 
+# Init: Definition of Help menu.
 menubutton .top.help -text "Help" -menu .top.help.m
-menu .top.help.m
+irmenu .top.help.m
 
-.top.help.m add command -label "Help on help" \
-        -command {tkerror "Help on help not available. Sorry"}
 .top.help.m add command -label "About" -command {about-origin}
 
+# Init: Pack menu bar items.
 pack .top.file .top.target .top.service .top.rset .top.options -side left
 pack .top.help -side right
 
+# Init: Define query area.
 index-lines .lines 1 $queryButtonsFind [lindex $queryInfo 0] activate-index
 
 button .mid.search -text Search -command {search-request 0} \
         -state disabled
 button .mid.scan -text Scan \
         -command scan-request -state disabled 
-button .mid.present -text {Present} -command [list present-more 10] \
+button .mid.present -text {Present} -command [list present-more 50] \
         -state disabled
 
 button .mid.clear -text Clear -command index-clear
 pack .mid.search .mid.scan .mid.present .mid.clear -side left \
         -fill y -pady 1
 
-text .data.record -height 2 -width 20 -wrap none -borderwidth 0 -relief flat \
-        -yscrollcommand [list .data.scroll set] -wrap $textWrap
+# Init: Define record area in main window.
+text .data.record -font fixed -height 2 -width 20 -wrap none -borderwidth 0 \
+        -relief flat -yscrollcommand [list .data.scroll set] \
+        -wrap $textWrap -background grey85
 scrollbar .data.scroll -command [list .data.record yview]
 if {[tk4]} {
     .data.record configure -takefocus 0
     .data.scroll configure -takefocus 0
 }
+
 pack .data.scroll -side right -fill y
 pack .data.record -expand yes -fill both
 initBindings
 
+# Init: Define standards tags. These are used in the display
+# format procedures.
 if {! $monoFlag} {
     .data.record tag configure marc-tag -foreground blue
     .data.record tag configure marc-id -foreground red
@@ -3378,29 +4129,27 @@ if {! $monoFlag} {
     .data.record tag configure marc-id -foreground black
 }
 .data.record tag configure marc-data -foreground black
-.data.record tag configure marc-head \
-        -font -Adobe-Times-Bold-R-Normal-*-140-* \
+.data.record tag configure marc-head -font $font(n,normal) \
         -foreground brown -relief raised -borderwidth 1
 .data.record tag configure marc-small-head -foreground brown
 .data.record tag configure marc-pref \
-        -font -Adobe-Times-Medium-R-Normal-*-140-* \
-        -foreground blue
+        -font $font(n,normal) -foreground blue
 .data.record tag configure marc-text \
-        -font -Adobe-Times-Medium-R-Normal-*-140-* \
-        -foreground black
+        -font $font(n,normal) -foreground black
 .data.record tag configure marc-it \
-        -font -Adobe-Times-Medium-I-Normal-*-140-* \
-        -foreground black
+        -font $font(n,normal) -foreground black
 
+# Init: Define logo.
 button .bot.logo -bitmap @${libdir}/bitmaps/book1 -command cancel-operation
 if {[tk4]} {
     .bot.logo configure -takefocus 0
 }
+# Init: Define status information fields at the bottom.
 frame .bot.a
 pack .bot.a -side left -fill x
 pack .bot.logo -side right -padx 2 -pady 2 -ipadx 1
 
-message .bot.a.target -text "" -aspect 1000 -border 1
+message .bot.a.target -text {} -aspect 2000 -border 1
 
 label .bot.a.status -text "Not connected" -width 15 -relief \
         sunken -anchor w -border 1
@@ -3413,18 +4162,40 @@ pack .bot.a.target -side top -anchor nw -padx 2 -pady 2
 pack .bot.a.status .bot.a.set .bot.a.message \
         -side left -padx 2 -pady 2 -ipadx 1 -ipady 1
 
-if {[catch {ir z39}]} {
+# Init: Determine if the IrTcl extension is already there. If
+#  not, then dynamically load the IrTcl extension.
+set logLevel all
+if {[catch {ir-version}]} {
     set e [info sharedlibextension]
-    puts -nonewline "Loading irtcl$e ..."
-    load irtcl$e irtcl
-    ir z39
-    puts "ok"
+    catch {load ${libdir}/irtcl$e irtcl}
+    if {[catch {ir-version}]} {
+	load irtcl$e irtcl
+    }
+}
+
+if $debugMode {	
+	ir-log-init all {} irtcl.log
+} else {
+	ir-log-init none {} {}
 }
-#z39 logLevel all
 
-if {$hostid != "Default"} {
-    catch {open-target $hostid $hostbase}
+# Create Z Assocation
+ir z39
+
+if {[file exists ${libdir}/explain.tcl]} {
+    source ${libdir}/explain.tcl
 }
 
-show-logo 1
+if {[file exists ${libdir}/setup.tcl]} {
+    source ${libdir}/setup.tcl
+}
 
+after 10 activateMainWindow
+
+proc activateMainWindow {} {
+    global hostid hostbase
+    if {[string compare $hostid Default]} {
+	catch {open-target $hostid $hostbase}
+    }
+    show-logo 1
+}