+1.10 (IN PROGRESS)
+ - Document the init-handler's PEER_NAME argument.
+ - Update URL into YAZ documentation.
+ - bend_delete() no longer returns without value.
+ - Route around ActivePerl's damage to the "open" symbol.
+ - ### When invoking Init callback, set initial values of
+ IMP_ID, IMP_NAME and IMP_VER from the client's Init request.
+
+1.09 Mon Sep 10 15:54:38 BST 2007
+ - *Argh* Another mixed statement/declaration.
+
+1.08 Mon Sep 10 12:15:29 BST 2007
+ - *Sigh* Fix mixed statement/declaration.
+
+1.07 Sat Sep 1 10:31:26 BST 2007
+ - When the scan-handler callback returns, do not attempt to
+ copy the terms from Perl structures if the error-code is
+ non-zero (i.e. if an error has occurred). This protects
+ against a segmentation fault when the Perl callback does not
+ explicitly set $args->{NUMBER} = 0 on error.
+ - Correct transcription of string-valued attributes in
+ $args->{RPN}.
+ - Scan handler is now passed RPN as well as TERM, a tree of
+ Perl structures representing the entire scan clause
+ including access-points and other attributes (which are
+ discarded from TERM).
+ - The various classes used to represent nodes in the RPN query
+ tree (Net::Z3950::APDU::Query, Net::Z3950::RPN::And,
+ Net::Z3950::RPN::Or, Net::Z3950::RPN::AndNot,
+ Net::Z3950::RPN::Term and Net::Z3950::RPN::RSID) now all
+ share a newly introduced superclass Net::Z3950::RPN::Node,
+ making it possible to write methods that apply to all node
+ types.
+ - A utility method toPQF() is provided for
+ Net::Z3950::RPN::Node, enabling the RPN tree to be converted
+ back into a flat PQF query.
+ - Add support for the Delete Result Set service.
+ - Add documentation for the Sort service.
+ - Some clarifications to documentation.
+
+1.06 Fri Aug 10 23:30:00 BST 2007
+ - New global-handle element can be specified when creating a
+ simple-server object and will be passed to all callback
+ functions. This allows global state to be eliminated from
+ SimpleServer applications ... finally!
+ - Search handler now deals correctly with undefined addinfo:
+ previously a (harmless) error message was emitted.
+ - Add Perl API to yaz_diag_srw_to_bib1(), which SimpleServer
+ applications will need if they access SRU/SRW back-end
+ databases and need to report errors.
+ - Add Perl API to yaz_diag_bib1_to_srw(), because it would
+ seem churlish not to.
+
+1.05 Wed Dec 27 13:19:13 CET 2006
+ - Taking new naming convention for YAZ constants into account.
+
+1.04 Fri Dec 1 10:48:32 CET 2006
+ - Build such that SimpleServer links to new yaz shared object.
+
+1.03 Tue Aug 8 17:27:16 BST 2006
+ - Rely on version 2.1.14 or later of YAZ; this is the first
+ version that reliably passes through the additional
+ information associated with errors generated while serving
+ SRU/W requests. No functional differences since 1.02.
+
+1.02 Wed Jul 26 12:09:50 BST 2006
+ - Better support for Open and User/Password authentication.
+ - SimpleServer.xs's rpn2pquery() is now discarded, and YAZ's
+ yaz_rpnquery_to_wrbuf() used instead. This is more robust
+ in dealing with unusual cases such as string-valued
+ attributes.
+ - Support for SCHEMA element when fetching records.
+
+1.01 Fri Mar 24 12:09:32 GMT 2006
+ - Documentation of release 1.00's SRU/SRW facilities.
+ - Makefile.PL now fails if YAZ version is earlier than 2.0.0,
+ which was the first with SRU/SRW support.
+
+1.00 Fri Mar 24 01:20:24 GMT 2006
+ - Support for SRU and SRW. Mostly this is provided by the YAZ
+ GFS, but changes are needed to allow for the case where
+ there is no RPN query (due to absent on invalid <cql2rpn>
+ element in GFS configuration) so that CQL is passed through
+ natively; and also to fake up an {REQ_FORM} and {REP_FORM}
+ parameters set to the "text/xml" OID when this information
+ is not specified by the GFS.
+ (The jump in version number is due to the SRU/W support.)
+ - Include "logging-server.pl" in the distribution: the
+ simplest possible SimpleServer application, which merely
+ logs the client-request data structures.
+ - Makefile.PL is more helpful if yaz-config isn't found.
+ - Explicitly disable prototypes in SimpleServer.xs: makes no
+ difference but suppresses an error message for a cleaner
+ build.
+