1 Possible compatibility problems with earlier versions marked with '*'.
5 * Old Z39.50 codecs no longer supported.
7 Added ZOOM C binding. See http://zoom.z3950.org/
9 Renamed states for COMSTACKs to avoid confusion with events.
11 Implemented cs_look and proper cs_rcvconnect.
13 Fixed COMSTACK error that occurred on HPUX. Fix by Giannis Kosmas.
15 Configure detects POSIX threads on OpenBSD.
17 When sort flag 'i' was specified in yaz-client the caseSensitivy flag
18 was set to a wrong value. Thanks to Robert Sanderson for reporting this.
20 When error is returned from present handler, non-surrogate diagnostic
21 is returned in present response (and fetch handler is no longer called).
23 * Minor adjustments to pquery parser (PQF). Token characters may be
24 escaped by using backslash (C-style).
26 PQF parser allows string attribute values to be specified. For @attr,
27 non-numeric characters after the equal-sign are treated as strings
30 CCL trunction character may be defined (@truncation in file)
32 * function zget_ExtendedServicesRequest sets waitAction to
33 waitIfPossible (was wait).
35 Added cs_set_blocking to set change blocking mode of a COMSTACK. Thanks
38 CCL operator names may be set in field definition files (CCL_bibset).
39 See ccl/bib1 for an example.
41 Fixes in ASN.1 compiler for C++ compatibility.
43 * Renamed members "and" and "or" in struct Z_Operator to "op_and"
44 and "op_or" to avoid conflict with C++.
46 Fixed problem with GNU readline detection on Redhat 7.0.
48 Added step-size for Scan backend handler.
50 Fixed bug that made the frontend server crash when no attribute
51 set was specified for scan.
53 Front-end server automatically switches to original working directory
54 when installed as an NT service. Previously -w had to be specified to
57 Added extended attributes for retrieval module (data1), so that data1
58 records carry d1_readXML/SGML attributes. d1_read also supports
59 null-data rules ( <tag/>)
61 On UNIX when POSIX threads are available, a separate library libyazthread
62 is created. Programmers should link with that library and the yaz library
63 when using threads. The reason for the split was that some applications
64 on Linux, such as Apache, doesn't work well when using shared objects that
67 Added SSL support for the COMSTACK. You start yaz-client and yaz-ztest
68 (or any frontend server) in SSL mode by specifying ssl: followed by
69 address. Only tested on UNIX.
71 Added feature for CCL module. Virtual structure s=al or s=ol generates
72 and-list and or-list respectively instead of phrase search.
76 * Added prefix "yaz_" for the functions log_init.., log_file.. and
77 log_mask_str. This was done to avoid name conflicts with other libraries
78 (such as other PHP extensions).
80 Added raw OID member for preferred record syntax (request_format_raw)
81 and returned record syntax (output_format_raw) for backend fetch method.
83 Config file yaz-config now accepts options so that it returns specific
84 compile settings, etc. Thanks to Morten Bøgeskov <morten@bogeskov.dk>
86 Shared library support for UNIX using GNU libtool.
88 * Modified backend interface. Request/Response struct's replaced by
89 one read/write C struct. For example bend_fetchrequest and
90 bend_fetchresult have been replaced by single bend_fetch_rr struct.
91 Every handler - even search has to be registered in bend_init
92 handler. This means that the YAZ library no longer refers to
93 external functions and it makes it possible to make the whole
94 thing a single DLL/SO.
96 Added Segment handler for backend server.
98 Added Zmbol/Zebra administrative functions to YAZ client.
100 Threaded frontend server on UNIX (when POSIX Threads are available).
101 Starting the server with option -T enables multi-threading.
105 Added configure option --enable-comp/disable-comp to control use
106 of YAZ ASN.1 compiler. Use --disable-comp to use the old *coders
107 located in sub directory asn.
109 YAZ ASN.1 compiler renamed to yaz-comp in sub directory. It's installed
110 in ${exec_prefix}/bin along with the other programs yaz-client and
113 GNU automake used to maintain makefiles.
117 Changed retrieval module so that we can load records with no abstract
118 syntax defined. Tagpaths in these records are fully composed of string
121 Implemented ISO ILL protocol. Refer to stuff in sub directory ill.
125 On UNIX, the generated makefile now supports a proper 'make install'.
126 The prefix can be set via GNU configure to set the install location
127 (default is /usr/local).
129 * YAZ programs client and ztest were renamed to yaz-client and
130 yaz-ztest to avoid conflicts when users install YAZ in "standard"
131 locations, such as /usr/bin,/usr/local/bin,etc.
133 * YAZ Header files were moved from include to include/yaz. YAZ Header
134 files are referred to as include <yaz/log.h> rather than <log.h>.
135 The YAZ include path (-I ..) is therefore the same as before. Programmers
136 should update their #include statements or use -Ipath/include/yaz
137 instead. The main motivation for doing this change is that YAZ header files
138 can be installed in "standard" locations /usr/include,/usr/local/include
139 without introducing conflicts, since ALL YAZ header files are stored
140 in subdirectory yaz (under /usr/include for example).
142 Compilation of YAZ for WIN32 is now handled by an nmake-style makefile
143 rather than project/workspace files. We switched because project files
144 are incompatible between Visual C++ 5 and 6. Refer to windows.txt for
147 Changed name of logging function, logf, to yaz_log, to prevent name
148 clash with some math-log functions. The YAZ header log.h defines logf
149 to yaz_log (#define) so there should be no incompatibilities by this
152 Added bend_start/bend_stop handlers for server. These handler are
153 called on start/stop of server. For windows they are called whenever
154 a service is started/stopped.
156 * YAZ now auto-generates decoders/encoders for the Z39.50 protocol using
157 a fairly small ASN.1 compiler written in Tcl. The compiler is located
158 in util/yc.tcl. The auto-generated C code structures are, in a few
159 cases, incompatible with the old decoders. There are differences in the
160 following C structures Z_DiagRec, Z_External, Z_SortRequest, Z_SortResponse,
161 Z_AttributesPlusTerm, Z_ProximityOperator, Z_DefaultDiagFormat.
162 The preprocessor variable ASN_COMPILED is defined when the compiled
163 ASN.1 is being used. Encoder/decoder routines as well as the Z39.50
164 protocol ASN.1 is located sub directory <tt>z39.50</tt>. If you
165 wish to use the old encoders/decoders you can specify --disable-yc
168 Assigned OID for old DB Update (VAL_DBUPDATE0). Updated YAZ compiled
169 version so that it supports both new - and old version of DB Update
171 * Added 'name' parameter to ODR encoder/decoder routines to facilitate
172 pretty ODR print. Updated whole Z39.50 encoder/decoder to reflect the
173 change. The name parameter can be set to 0 in which no name is specified
174 for the construction. The macros odr_implicit and odr_explicit sets name
175 parameter to zero for the construction involved. New macros
176 odr_implicit_tag and odr_explicit_tag are similar to the others,
177 except that a name parameter is added. For programmers' that don't use
178 ODR they probably only need to change the call to z_APDU and z_External.
180 Added access control facility by interfacing the TCP wrapper library.
181 YAZ automatically attempts to find the TCP wrapper Library (-lwrap) and
182 tcpd.h on Unix systems. For the server, option -d<daemon> specifies the
183 name of the daemon and enables the access control as specified in
184 hosts.allow/hosts.deny. Refer to man pages tcpd(8) and hosts_access(5).
186 Fixed memory leak in ccl_find_str and ccl_qual_rm. Thanks to Hans van
187 den Dool <H.M.vdnDool@kub.nl>.
189 Added reference ID parameter to most functions in server API - refer
190 to backend.h. Thanks to Hans van den Dool <H.M.vdnDool@kub.nl>.
192 Changed name of ccl library to libccl.a (was ccl.a).
194 Fixed bug in decoder for Explain (Category TargetInfo).
196 Added support for GNU readline in client. Thanks to Jacob Poulsen
197 <ja7@dbc.dk>. GNU configure attempts to detect if readline is available.
199 * CHANGED DEFINITION OF ES: UPDATE (INCLUDING THE OID) to reflect the
200 new definition from the ZIG. NOTE THIS IF YOU HAVE AN UPDATE
201 IMPLEMENTATION! This change was made to the development version before
202 the ZIG decided to retract the amendment. If any users MUST be
203 compatible with the original Update definition, PLEASE CONTACT US, and
204 we will include a separate definition corresponding to the old Update
205 ES. Note that because of the change to the ASN.1 of the
206 TaskPackageRecordStructure we cannot define a single structure that
207 will support both versions.
209 * Added const modifier to buffer parameter for some ODR/BER encoding
210 routines: ber_dectag, ber_declen, odp_more_chunks, completeBER,
211 completeWAIS, odr_dumpBER.
213 Fixed bug in client.c which caused a crash when a scanResponse didn't
214 contain positionOfTerm.
216 * Fixed inconsistency in the ScanResponse/ListEntries protocol. This
217 * will cause an error in a client if a non-YAZ target sends both a
218 * list of Scan entries and non-surrogate diagnostics.
220 Retrieval module enhancements. Tag sets may be typed in the reference
221 to it. From the .abs-file the "tagset" directive takes a third optional
222 integer type for the tag set referenced. From a .tag-file the "include"
223 directive takes a third optional type as well. The old "type" directive
224 in the tag set itself is still recognized but acts as the default type
227 Backend interface change. Individual Scan terms returned from bend_scan
228 may also be tagged as Surrogate Diagnostics. Refer to struct scan_entry
229 in include/backend.h.
231 Retrieval module enhancements. Multiple tag sets and attribute sets may
232 be specified in abstract syntax specs. Revised the error/warning for
233 logging messages reported by the retrieval module when reading the
236 Object Identifier system (oid_..) changed. The API is backwards
237 compatible but the oid-routines now allocates new OID's when needed.
238 Raw OID's may be specified in oid_getvalbyname.
240 YAZ now uses GNU configure to generate Makefile(s).
242 * Minor changes in some of the member names of DeleteResultSetRequest and
243 DeleteResultSetResponse. See include/proto.h.
245 * Changed some C definitions regarding EXPLAIN record syntax (prt-exp.h)
246 and added member 'languages' in TargetInfo (which was missing).
248 Changed the way attribute sets are handled in the retrieval
249 module. These are now cached, just like the abstract syntaxes
252 Changed YAZ so that it links with compiled ASN.1.
254 Added Explain-schema definitions and mapping routines. The following
255 Explain categories have been implemented: AttributeDetails,
256 AttributeSetInfo, DatabaseInfo, CategoryList and TargetInfo.
258 Fixed minor bug in Windows version of Server Library.
260 --- 1.4pl2+ 1998/4/17 (Released with Zebra)
262 Added Extended Services to server (backend.h). Thanks to Charles Woodfield.
264 Added EXTERNAL: UNIverse Resource Report (non-standard).
266 Implemened odr_enum and odr_set_of functions to handle ASN.1 types
267 ENUMERATED and SET OF.
269 * Added 'const' to some of the char pointer arguments for the
270 functions, data1_read_node, data1_getelementbytagname,
271 data1_insert_taggeddata, data1_getesetbyname, data1_getelementbyname,
274 Fixed bug in data1_insert_taggeddata - the last_child member of
275 parent wasn't initialised.
277 * Changed data1_read_record and data1_read_node so that the supplied
278 "SGML"-buffer is read-only. In particular the resulting data1 - tree
279 doesn't refer to any parts of the "SGML"-buffer.
281 Fixed bug in server library (Windows version of statserv_remove).
283 * Changed code so that it compiles as C++. The type definition
284 of Odr_fun which is a member of Odr_arm was changed. The result is,
285 that an explicit typecast is needed for the fun pointer when
286 using Odr_arm - as in:
287 {1, -1, -1, Z_IdAuthentication_idPass, (Odr_fun)z_IdPass},
289 Updated TagSet-G and -M definitions (tagsetm.tag and tagsetg.tag).
291 Implemented the new structured date and time definition as approved
292 by the ZIG. Added schemaId element to the specificTag in Espec-1
293 (also approved at the last ZIG). Thanks to RVDM.
295 Added some Object identifiers (RVDM).
297 Changed the Update Extended Service (RVDM).
299 Added command "refid" to client which specifies referenceId for
300 the following requests.
302 Implemented extended service handling for server. See ztest.c
303 for an example as well as backend.h. New handlers are registerd
306 * Changed interface for sort in server.
308 Added new members to statserv_options_block. It allows a server
309 to read options from another source than just the command line. Thanks
310 to Charles Woodfield.
312 * Changed definition of Z_Triple in file prt-grs.h - member boolean
313 renamed to zboolean. Some C++ compilers complained about the name.
315 Minor changes to gils.abs. Added index 's' (sort) on title
316 and date/time-last-modified.
320 Fixed bug in server library regarding inetd mode (-i). This bug
321 was introduced by release 1.4.
325 Added sort facility in client and backend server interface.
327 Fixed problem with dependencies in Makefile(s).
329 Fixed bugs for encoders/decoders of extended services and
332 Implemented sub-tree feature for schemas. Sub-trees are
333 referenced in *.abs-files. See explain.abs for an example
334 of the use of this feature.
336 Modified bib1.att; local attributes for ANY didn't include
337 ANY itself (only affects use of the retrieval module).
339 Fixed bug in plain SGML reader in function data1_read_node:
340 tags with prefix "var" was incorrectly interpreted as variants.
342 Added feature "sub-schemas" to enable references to - and definitions
343 of - group of elements.
345 * Removed member parent from type data1_element (in data1.h).
347 Implemented function odr_nullval() that returns the value of
350 * Removed member num_children from data1_node (in data1.h).
352 Made NT service interface part of the server library. The
353 function statserv_main uses the NT service when required and
354 calls the statserv_start / statserv_close routines.
356 Routine zget_SearchRequest and zget_PresentRequest fills
357 resultSetName/Id member with "default" instead of "Default".
359 Fixed memory leak in server. Request queue member wasn't freed.
361 Fixed nmem_exit so that memory is freed.
365 Revised the CCL parser utility to be thread safe.
367 Added function, oid_ent_to_oid, to replace the function
368 oid_getoidbyent, which is not thread safe.
370 * Added nmem_init and nmem_exit to initialize and release
371 NMEM resources. Function nmem_init should be called once in the
372 initial thread before NMEM/ODR is used. statserv.c and client.c
373 have been changed accordingly. The change was necessary to make
374 NMEM thread safe. The NMEM memory pool is shared amongst threads
375 in a process. Unix-based applications will still work fine without
378 Added NT Services interface for the the Z39.50 (statserv) Server.
379 Refer to the ztest.c source on the usage.
381 Windows 95/NT port using MSVC5.0. Project files are included in the
384 * Defined new 'global' handle for the retrieval (data1) system. The
385 new handled, data1_handle, describes the state of the data1 system.
386 This handle is passed as first argument to virtually all
387 data1 related routines. The functions data1_create and data1_destroy
388 creates and destroys a data1 handle respectively.
390 Added ODR encode stream member to all backend request structures
391 init, search, scan etc. This stream should be used to allocate all
392 memory used for the response when thread safe operation is needed.
394 Changed the comstack utility, cs_addstr, to be thread safe. The
395 returned hostname string returned by the function is now part the
398 Added comstack utility, cs_straddr, which replaces the tcpip_strtoaddr
399 function. The cs_straddr takes a COMSTACK handle as argument, so this
400 function must be used after cs_create and before bind/connect.
401 This function is thread safe.
403 Moved test server to 'ztest' directory - generic server code still
404 in 'server' directory.
406 Made prefix query (pquery.c) utility thread safe.
408 Added new function modifier YAZ_EXPORT to 'export' public DLL
409 functions when using windows (see include/yconfig.h).
411 Added definitions to the OID database (util/oid.c) (RVDM).
413 Added new BIB-1 diagnostic messages to the handler diagbib1_str.
415 Added call to ccl_rpn_delete in client program.
417 Added ODR argument to ccl_rpn_query and ccl_scan_query to provide
418 release of RPN structure.
420 Added support for C++, headers uses extern "C" for public definitions.
421 With input from RVDM.
423 In handling of SEQUENCE OF: Counter set to zero when SEQUENCE OF is absent.
424 Thanks to Ronald van der Meer (RVDM).
426 Added initializers (zget_ routines) for a number of PDUs. Thanks to RVDM.
428 Added support for private extensions to the OID database
429 (oid_setprivateoids()). Thanks to RVDM.
431 Added optional, physical ANY (key replication)
433 Fixed null-reference problem in GRS-1 output filter.
435 Proximity operator added to Prefix Query Format (PQF).
437 In test client command "base" accepts multiple databases.
439 Fixed bug in cs_close stack that caused trouble with WINSOCK.
443 Fixed tagging bug in ResourceReportResponse PDU encoder/decode.
445 Smallish bug-fixes in the new encoders/decoders (explain).
447 Bug fixed in DeleteRequest.
449 Fixed tagging bug of type 101 query in SearchRequest-Query PDU encoder/decoder.
451 Fixed tagging bug in ResourceReportResponse PDU encoder/decode.
453 Added SOIF syntax (using private OID for now) to retrieval module and client.
455 Added Update extended service.
457 Added SearchResult-1 additional info structure.
459 Added optional CCL (ISO8777) interpreter as separate module. Available
462 --- 1.2 1996/6/10 (1st anniversary release)
464 Added Summary record syntax. Lightly tested.
466 Added OPAC record syntax. Untested.
468 Added ResourceReport service encoders/decoders. Untested.
470 Fixed bug in z_Unit - wrong tagging on unitSystem.
472 Fixed bug in the DiagRecs decoder.
474 Added options for max PDU size and session timeout to frontend-server.
476 Added documentation of query-language parsers and other supporting utilities.
478 [frontend-server] Added Attribute set to the bend_scanrequest API.
480 [frontend-server] NextResultSetPosition was sometimes set incorrectly when
481 surrogate diagnostics were generated.
483 [retrieval] Allow multiple local values for attribute.
485 [retrieval] Allow multiple attributes per element in .abs files. index type.
487 [retrieval] Added Summary tagset, abstract syntax, and d1-node/ASN filter.
491 Minor changes, mostly specific to Zebra's requirements (retrieval)
495 Repaired bug in frontend server when running multiple listening
496 endpoints in dynamic mode.
498 z_External() now won't break if a known, ASN.1 value comes encapsulated
499 in an octet-string. The value will pass through unmodified in an Odr_oct.
501 Added a bit of code to the demo client to decode & display
502 ASN.1-structured records represented in the octet-aligned branch of
503 the EXTERNAL CHOICE. Thanks to CAS for prodding us to finally do this.
505 Added z_ext_getentbyref() to the ASN module. Doc updated.
507 * Completed the SCAN definition in the ASN module. This may break SCAN
508 code based on older YAZ-versions at compile-time. The fix is easy -
511 * Added 'displayTerm' and OtherInformation to the TermInfo structure
512 under the SCAN definition. Remember to initialize this, server-people.
514 Comstack should now support the WAIS protocol in TCP/IP mode. Note
515 that this does not extend to ODR and ASN.
517 Comstack allows insertion of established socket (primarily for
518 inetd-operation of servers). Doc updated.
520 Front-end server can now start from the inetd in TCP mode. Doc
527 Fixed small problem in SUTRS-filter. A newline was sometimes inserted before
528 the rank and record number.
530 Adjustments to the frontend server.
532 Fixed diagnostic BER dumper. It ignored the file argument.
536 Various changes to retrieval module.
538 Changed the union discriminators of the protocol files from enums to
539 ints paired with #defines.
541 *Changed oident.class to oident.oclass to avoid a reserved word in C++
544 *Changed operator in the RPN structure to 'roperator', again to avoid a
547 Fixed problems in Explain decoders/encoders.
551 Memory bug in log module fixed.
555 Occasional malloc() of 0 bytes fixed in d1_espec.c.
557 Bug in Explain DatabaseInfo module fixed.
559 Some '\r' snuck into one or two of the ret'l config tables. A curse on Windows.
563 The shift to v1.0 signals that we now consider the *core* functionality
564 of YAZ reasonably stable (the core being more or less equivalent to
565 Z39.50-1992). Some of the really nifty v3 stuff is still not heavily
566 tested (Explain not at all - though that will happen soonish).
568 Minor changes to code to support Windows port.
570 Various minor changes after we're getting to use GRS-1 & co. more.
572 Added Espec-1 format.
574 Added VisibleString field body type to GRS-1. It is illegal acc. to my copy
575 of the protocol and it cannot be selected when encoding (maps into 'string'
576 when decoding). Needed to talk to some servers.
578 Demo client can request simple element set names.
580 Added Diagnostic Format encoders/decoders.
582 Added simple Close handling to frontend server (no hooks for resource
583 reporting yet), and demonstration client.
585 Added cs_addrstr() command to COMSTACK to retrieve peer hostname/address.
589 Fixed bug in the frontend-server. The numberOfRecordsReturned field was
590 handled incorrectly when records were requested in the searchResponse. This
591 will only affect you if you use the frontend-server.
593 Added GRS-1 encoders/decoders to the service-level API. Lightly tested.
594 Test-client will ask for and print GRS1. Ztest will return dummy records
597 Added Explain encoders/decoders to the service-level API. Untested.
599 Added Extended Services: Item Order encoders and decoders to the Service-
600 level API. Untested. We could use a recent copy of the pertinent bits
601 of the ILL protocol to add those bits.
603 Added diagnostic format 1 encoders/decoders to the service-level API.
606 Moved pretty-printing of structure-wrappers ({..}) from odr_seq.c to
607 odr_cons.c, which causes a more correct output.
609 Fixed handling of searchRequest in frontend server. NextResultSetPosition
610 was always set to 0 when no records were requested in the searchRequest.
612 * Added better external-handling. This shouldn't harm old code that
613 *encodes* externals. It can break code that looks for a
614 'single-ASN1-type' representation, since those types that are known
615 are now decoded immediately. Look at the SUTRS sample code in
616 seshigh.c and client.c. Documentation updated.
618 Handling of structured records in bend_fetchresponse. Length -1 marks
619 structured record, type is deduced from format field.
622 Fairly quick maintenance release to add SUTRS support.
624 Fixed handling of SUTRS records in the demonstration client.
626 * Added format field to the bend_fetchrequest and bend_fetchresponce
627 structures of the backend API (frontend server). When the record is
628 returned, the value of the format field is mapped to an OID. The
629 value VAL_SUTRS will also cause a slightly different ASN.1 packaging
630 of the record. The special value VAL_NONE in the bend_request means
631 that no specific format was requested by the client. Documentation
632 updated accordingly. Test server (ztest) will return a fixed dummy
633 SUTRS record if your client requests SUTRS.
635 Documentation updated accordingly.
637 You can now set external libraries and RANLIB support in the top-level
641 First public release.