Possible compatibility problems with earlier versions marked with '*'.
+Added feature for CCL module. Virtual structure s=al or s=ol generates
+and-list and or-list respectively instead of phrase search.
+
+Added some OID's.
+
+* Added prefix "yaz_" for the functions log_init.., log_file.. and
+log_mask_str. This was done to avoid name conflicts with other
+libraries (say other PHP extensions).
+
+Added raw OID member for preferred record syntax (request_format_raw)
+and returned record syntax (output_format_raw) for backend fetch method.
+
+Config file yaz-config now accepts options so that it returns specific
+compile settings, etc. Thanks to Morten Bøgeskov <morten@bogeskov.dk>
+
+Shared library support for UNIX using GNU libtool.
+
+* Modified backend interface. Request/Response struct's replaced by
+one read/write C struct. For example bend_fetchrequest and
+bend_fetchresult have been replaced by single bend_fetch_rr struct.
+Every handler - even search has to be registered in bend_init
+handler. This means that the YAZ library no longer refers to
+external functions and it makes it possible to make the whole
+thing a single DLL/SO.
+
+Added Segment handler for backend server.
+
+Added Zmbol/Zebra administrative functions to YAZ client.
+
+Threaded frontend server on UNIX (when POSIX Threads are available).
+Starting the server with option -T enables multi-threading.
+
+--- 1.6 2000/03/03
+
+Added configure option --enable-comp/disable-comp to control use
+of YAZ ASN.1 compiler. Use --disable-comp to use the old *coders
+located in sub directory asn.
+
+YAZ ASN.1 compiler renamed to yaz-comp in sub directory. It's installed
+in ${exec_prefix}/bin along with the other programs yaz-client and
+yaz-ztest.
+
+GNU automake used to maintain makefiles.
+
+Added several OID's.
+
+Changed retrieval module so that we can load records with no abstract
+syntax defined. Tagpaths in these records are fully composed of string
+tags.
+
+Implemented ISO ILL protocol. Refer to stuff in sub directory ill.
+
+--- 1.5 1999/12/10
+
+On UNIX, the generated makefile now supports a proper 'make install'.
+The prefix can be set via GNU configure to set the install location
+(default is /usr/local).
+
+* YAZ programs client and ztest were renamed to yaz-client and
+yaz-ztest to avoid conflicts when users install YAZ in "standard"
+locations, such as /usr/bin,/usr/local/bin,etc.
+
+* YAZ Header files were moved from include to include/yaz. YAZ Header
+files are referred to as include <yaz/log.h> rather than <log.h>.
+The YAZ include path (-I ..) is therefore the same as before. Programmers
+should update their #include statements or use -Ipath/include/yaz
+instead. The main motivation for doing this change is that YAZ header files
+can be installed in "standard" locations /usr/include,/usr/local/include
+without introducing conflicts, since ALL YAZ header files are stored
+in subdirectory yaz (under /usr/include for example).
+
+Compilation of YAZ for WIN32 is now handled by an nmake-style makefile
+rather than project/workspace files. We switched because project files
+are incompatible between Visual C++ 5 and 6. Refer to windows.txt for
+details.
+
+Changed name of logging function, logf, to yaz_log, to prevent name
+clash with some math-log functions. The YAZ header log.h defines logf
+to yaz_log (#define) so there should be no incompatibilities by this
+modification.
+
+Added bend_start/bend_stop handlers for server. These handler are
+called on start/stop of server. For windows they are called whenever
+a service is started/stopped.
+
+* YAZ now auto-generates decoders/encoders for the Z39.50 protocol using
+a fairly small ASN.1 compiler written in Tcl. The compiler is located
+in util/yc.tcl. The auto-generated C code structures are, in a few
+cases, incompatible with the old decoders. There are differences in the
+following C structures Z_DiagRec, Z_External, Z_SortRequest, Z_SortResponse,
+Z_AttributesPlusTerm, Z_ProximityOperator, Z_DefaultDiagFormat.
+The preprocessor variable ASN_COMPILED is defined when the compiled
+ASN.1 is being used. Encoder/decoder routines as well as the Z39.50
+protocol ASN.1 is located sub directory <tt>z39.50</tt>. If you
+wish to use the old encoders/decoders you can specify --disable-yc
+for configure.
+
+Assigned OID for old DB Update (VAL_DBUPDATE0). Updated YAZ compiled
+version so that it supports both new - and old version of DB Update
+
+* Added 'name' parameter to ODR encoder/decoder routines to facilitate
+pretty ODR print. Updated whole Z39.50 encoder/decoder to reflect the
+change. The name parameter can be set to 0 in which no name is specified
+for the construction. The macros odr_implicit and odr_explicit sets name
+parameter to zero for the construction involved. New macros
+odr_implicit_tag and odr_explicit_tag are similar to the others,
+except that a name parameter is added. For programmers' that don't use
+ODR they probably only need to change the call to z_APDU and z_External.
+
Added access control facility by interfacing the TCP wrapper library.
YAZ automatically attempts to find the TCP wrapper Library (-lwrap) and
tcpd.h on Unix systems. For the server, option -d<daemon> specifies the
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