1 Possible compatibility problems with earlier versions marked with '*'.
5 Working on Debian packages.
9 YAZ client enables named result sets only if target supports it.
11 *** ZOOM. Prefix for ZOOM definitions changed from Z3950_ to ZOOM_.
13 * ZOOM. Removed Z3950_connection_host. Use Z3950_connection_option_get
14 with key="host" to get same result.
16 * ZOOM. Added Z3950_record_clone and removed Z3950_resultset_get.
17 Function Z3950_resultset_record(s) returns references to records
18 "owned" by resultset. To become owner use Z3950_record_clone.
20 Function z_ext_record handles Extended Services. Thanks to
25 CCL Parser fix: ignore token comma when dealing with and-lists.
27 Documentation updates for COMSTACK.
29 * ZOOM changes. Query object renamed from Z3950_search to Z3950_query.
30 Changed prototype Z3950_records. For some functions, int parameters
31 were changed to size_t.
33 TCP/IP COMSTACK no longer uses getprotobyname to avoid memory leak
36 New MARC decode/display function, marc_display_exl, which properly rejects
37 non-ISO2709 records. YAZ client uses it.
41 Fix bug: local attribute set wasn't set correctly in PQF strings.
45 * Old Z39.50 codecs no longer supported.
47 Added ZOOM C binding. See http://zoom.z3950.org/
49 Renamed states for COMSTACKs to avoid confusion with events.
51 Implemented cs_look and proper cs_rcvconnect.
53 Fixed COMSTACK error that occurred on HPUX. Fix by Giannis Kosmas.
55 Configure detects POSIX threads on OpenBSD.
57 When sort flag 'i' was specified in yaz-client the caseSensitivy flag
58 was set to a wrong value. Thanks to Robert Sanderson for reporting this.
60 When error is returned from present handler, non-surrogate diagnostic
61 is returned in present response (and fetch handler is no longer called).
63 * Minor adjustments to pquery parser (PQF). Token characters may be
64 escaped by using backslash (C-style).
66 PQF parser allows string attribute values to be specified. For @attr,
67 non-numeric characters after the equal-sign are treated as strings
70 CCL trunction character may be defined (@truncation in file)
72 * function zget_ExtendedServicesRequest sets waitAction to
73 waitIfPossible (was wait).
75 Added cs_set_blocking to set change blocking mode of a COMSTACK. Thanks
78 CCL operator names may be set in field definition files (CCL_bibset).
79 See ccl/bib1 for an example.
81 Fixes in ASN.1 compiler for C++ compatibility.
83 * Renamed members "and" and "or" in struct Z_Operator to "op_and"
84 and "op_or" to avoid conflict with C++.
86 Fixed problem with GNU readline detection on Redhat 7.0.
88 Added step-size for Scan backend handler.
90 Fixed bug that made the frontend server crash when no attribute
91 set was specified for scan.
93 Front-end server automatically switches to original working directory
94 when installed as an NT service. Previously -w had to be specified to
97 Added extended attributes for retrieval module (data1), so that data1
98 records carry d1_readXML/SGML attributes. d1_read also supports
99 null-data rules ( <tag/>)
101 On UNIX when POSIX threads are available, a separate library libyazthread
102 is created. Programmers should link with that library and the yaz library
103 when using threads. The reason for the split was that some applications
104 on Linux, such as Apache, doesn't work well when using shared objects that
107 Added SSL support for the COMSTACK. You start yaz-client and yaz-ztest
108 (or any frontend server) in SSL mode by specifying ssl: followed by
109 address. Only tested on UNIX.
111 Added feature for CCL module. Virtual structure s=al or s=ol generates
112 and-list and or-list respectively instead of phrase search.
116 * Added prefix "yaz_" for the functions log_init.., log_file.. and
117 log_mask_str. This was done to avoid name conflicts with other libraries
118 (such as other PHP extensions).
120 Added raw OID member for preferred record syntax (request_format_raw)
121 and returned record syntax (output_format_raw) for backend fetch method.
123 Config file yaz-config now accepts options so that it returns specific
124 compile settings, etc. Thanks to Morten Bøgeskov <morten@bogeskov.dk>
126 Shared library support for UNIX using GNU libtool.
128 * Modified backend interface. Request/Response struct's replaced by
129 one read/write C struct. For example bend_fetchrequest and
130 bend_fetchresult have been replaced by single bend_fetch_rr struct.
131 Every handler - even search has to be registered in bend_init
132 handler. This means that the YAZ library no longer refers to
133 external functions and it makes it possible to make the whole
134 thing a single DLL/SO.
136 Added Segment handler for backend server.
138 Added Zmbol/Zebra administrative functions to YAZ client.
140 Threaded frontend server on UNIX (when POSIX Threads are available).
141 Starting the server with option -T enables multi-threading.
145 Added configure option --enable-comp/disable-comp to control use
146 of YAZ ASN.1 compiler. Use --disable-comp to use the old *coders
147 located in sub directory asn.
149 YAZ ASN.1 compiler renamed to yaz-comp in sub directory. It's installed
150 in ${exec_prefix}/bin along with the other programs yaz-client and
153 GNU automake used to maintain makefiles.
157 Changed retrieval module so that we can load records with no abstract
158 syntax defined. Tagpaths in these records are fully composed of string
161 Implemented ISO ILL protocol. Refer to stuff in sub directory ill.
165 On UNIX, the generated makefile now supports a proper 'make install'.
166 The prefix can be set via GNU configure to set the install location
167 (default is /usr/local).
169 * YAZ programs client and ztest were renamed to yaz-client and
170 yaz-ztest to avoid conflicts when users install YAZ in "standard"
171 locations, such as /usr/bin,/usr/local/bin,etc.
173 * YAZ Header files were moved from include to include/yaz. YAZ Header
174 files are referred to as include <yaz/log.h> rather than <log.h>.
175 The YAZ include path (-I ..) is therefore the same as before. Programmers
176 should update their #include statements or use -Ipath/include/yaz
177 instead. The main motivation for doing this change is that YAZ header files
178 can be installed in "standard" locations /usr/include,/usr/local/include
179 without introducing conflicts, since ALL YAZ header files are stored
180 in subdirectory yaz (under /usr/include for example).
182 Compilation of YAZ for WIN32 is now handled by an nmake-style makefile
183 rather than project/workspace files. We switched because project files
184 are incompatible between Visual C++ 5 and 6. Refer to windows.txt for
187 Changed name of logging function, logf, to yaz_log, to prevent name
188 clash with some math-log functions. The YAZ header log.h defines logf
189 to yaz_log (#define) so there should be no incompatibilities by this
192 Added bend_start/bend_stop handlers for server. These handler are
193 called on start/stop of server. For windows they are called whenever
194 a service is started/stopped.
196 * YAZ now auto-generates decoders/encoders for the Z39.50 protocol using
197 a fairly small ASN.1 compiler written in Tcl. The compiler is located
198 in util/yc.tcl. The auto-generated C code structures are, in a few
199 cases, incompatible with the old decoders. There are differences in the
200 following C structures Z_DiagRec, Z_External, Z_SortRequest, Z_SortResponse,
201 Z_AttributesPlusTerm, Z_ProximityOperator, Z_DefaultDiagFormat.
202 The preprocessor variable ASN_COMPILED is defined when the compiled
203 ASN.1 is being used. Encoder/decoder routines as well as the Z39.50
204 protocol ASN.1 is located sub directory <tt>z39.50</tt>. If you
205 wish to use the old encoders/decoders you can specify --disable-yc
208 Assigned OID for old DB Update (VAL_DBUPDATE0). Updated YAZ compiled
209 version so that it supports both new - and old version of DB Update
211 * Added 'name' parameter to ODR encoder/decoder routines to facilitate
212 pretty ODR print. Updated whole Z39.50 encoder/decoder to reflect the
213 change. The name parameter can be set to 0 in which no name is specified
214 for the construction. The macros odr_implicit and odr_explicit sets name
215 parameter to zero for the construction involved. New macros
216 odr_implicit_tag and odr_explicit_tag are similar to the others,
217 except that a name parameter is added. For programmers' that don't use
218 ODR they probably only need to change the call to z_APDU and z_External.
220 Added access control facility by interfacing the TCP wrapper library.
221 YAZ automatically attempts to find the TCP wrapper Library (-lwrap) and
222 tcpd.h on Unix systems. For the server, option -d<daemon> specifies the
223 name of the daemon and enables the access control as specified in
224 hosts.allow/hosts.deny. Refer to man pages tcpd(8) and hosts_access(5).
226 Fixed memory leak in ccl_find_str and ccl_qual_rm. Thanks to Hans van
227 den Dool <H.M.vdnDool@kub.nl>.
229 Added reference ID parameter to most functions in server API - refer
230 to backend.h. Thanks to Hans van den Dool <H.M.vdnDool@kub.nl>.
232 Changed name of ccl library to libccl.a (was ccl.a).
234 Fixed bug in decoder for Explain (Category TargetInfo).
236 Added support for GNU readline in client. Thanks to Jacob Poulsen
237 <ja7@dbc.dk>. GNU configure attempts to detect if readline is available.
239 * CHANGED DEFINITION OF ES: UPDATE (INCLUDING THE OID) to reflect the
240 new definition from the ZIG. NOTE THIS IF YOU HAVE AN UPDATE
241 IMPLEMENTATION! This change was made to the development version before
242 the ZIG decided to retract the amendment. If any users MUST be
243 compatible with the original Update definition, PLEASE CONTACT US, and
244 we will include a separate definition corresponding to the old Update
245 ES. Note that because of the change to the ASN.1 of the
246 TaskPackageRecordStructure we cannot define a single structure that
247 will support both versions.
249 * Added const modifier to buffer parameter for some ODR/BER encoding
250 routines: ber_dectag, ber_declen, odp_more_chunks, completeBER,
251 completeWAIS, odr_dumpBER.
253 Fixed bug in client.c which caused a crash when a scanResponse didn't
254 contain positionOfTerm.
256 * Fixed inconsistency in the ScanResponse/ListEntries protocol. This
257 * will cause an error in a client if a non-YAZ target sends both a
258 * list of Scan entries and non-surrogate diagnostics.
260 Retrieval module enhancements. Tag sets may be typed in the reference
261 to it. From the .abs-file the "tagset" directive takes a third optional
262 integer type for the tag set referenced. From a .tag-file the "include"
263 directive takes a third optional type as well. The old "type" directive
264 in the tag set itself is still recognized but acts as the default type
267 Backend interface change. Individual Scan terms returned from bend_scan
268 may also be tagged as Surrogate Diagnostics. Refer to struct scan_entry
269 in include/backend.h.
271 Retrieval module enhancements. Multiple tag sets and attribute sets may
272 be specified in abstract syntax specs. Revised the error/warning for
273 logging messages reported by the retrieval module when reading the
276 Object Identifier system (oid_..) changed. The API is backwards
277 compatible but the oid-routines now allocates new OID's when needed.
278 Raw OID's may be specified in oid_getvalbyname.
280 YAZ now uses GNU configure to generate Makefile(s).
282 * Minor changes in some of the member names of DeleteResultSetRequest and
283 DeleteResultSetResponse. See include/proto.h.
285 * Changed some C definitions regarding EXPLAIN record syntax (prt-exp.h)
286 and added member 'languages' in TargetInfo (which was missing).
288 Changed the way attribute sets are handled in the retrieval
289 module. These are now cached, just like the abstract syntaxes
292 Changed YAZ so that it links with compiled ASN.1.
294 Added Explain-schema definitions and mapping routines. The following
295 Explain categories have been implemented: AttributeDetails,
296 AttributeSetInfo, DatabaseInfo, CategoryList and TargetInfo.
298 Fixed minor bug in Windows version of Server Library.
300 --- 1.4pl2+ 1998/4/17 (Released with Zebra)
302 Added Extended Services to server (backend.h). Thanks to Charles Woodfield.
304 Added EXTERNAL: UNIverse Resource Report (non-standard).
306 Implemened odr_enum and odr_set_of functions to handle ASN.1 types
307 ENUMERATED and SET OF.
309 * Added 'const' to some of the char pointer arguments for the
310 functions, data1_read_node, data1_getelementbytagname,
311 data1_insert_taggeddata, data1_getesetbyname, data1_getelementbyname,
314 Fixed bug in data1_insert_taggeddata - the last_child member of
315 parent wasn't initialised.
317 * Changed data1_read_record and data1_read_node so that the supplied
318 "SGML"-buffer is read-only. In particular the resulting data1 - tree
319 doesn't refer to any parts of the "SGML"-buffer.
321 Fixed bug in server library (Windows version of statserv_remove).
323 * Changed code so that it compiles as C++. The type definition
324 of Odr_fun which is a member of Odr_arm was changed. The result is,
325 that an explicit typecast is needed for the fun pointer when
326 using Odr_arm - as in:
327 {1, -1, -1, Z_IdAuthentication_idPass, (Odr_fun)z_IdPass},
329 Updated TagSet-G and -M definitions (tagsetm.tag and tagsetg.tag).
331 Implemented the new structured date and time definition as approved
332 by the ZIG. Added schemaId element to the specificTag in Espec-1
333 (also approved at the last ZIG). Thanks to RVDM.
335 Added some Object identifiers (RVDM).
337 Changed the Update Extended Service (RVDM).
339 Added command "refid" to client which specifies referenceId for
340 the following requests.
342 Implemented extended service handling for server. See ztest.c
343 for an example as well as backend.h. New handlers are registerd
346 * Changed interface for sort in server.
348 Added new members to statserv_options_block. It allows a server
349 to read options from another source than just the command line. Thanks
350 to Charles Woodfield.
352 * Changed definition of Z_Triple in file prt-grs.h - member boolean
353 renamed to zboolean. Some C++ compilers complained about the name.
355 Minor changes to gils.abs. Added index 's' (sort) on title
356 and date/time-last-modified.
360 Fixed bug in server library regarding inetd mode (-i). This bug
361 was introduced by release 1.4.
365 Added sort facility in client and backend server interface.
367 Fixed problem with dependencies in Makefile(s).
369 Fixed bugs for encoders/decoders of extended services and
372 Implemented sub-tree feature for schemas. Sub-trees are
373 referenced in *.abs-files. See explain.abs for an example
374 of the use of this feature.
376 Modified bib1.att; local attributes for ANY didn't include
377 ANY itself (only affects use of the retrieval module).
379 Fixed bug in plain SGML reader in function data1_read_node:
380 tags with prefix "var" was incorrectly interpreted as variants.
382 Added feature "sub-schemas" to enable references to - and definitions
383 of - group of elements.
385 * Removed member parent from type data1_element (in data1.h).
387 Implemented function odr_nullval() that returns the value of
390 * Removed member num_children from data1_node (in data1.h).
392 Made NT service interface part of the server library. The
393 function statserv_main uses the NT service when required and
394 calls the statserv_start / statserv_close routines.
396 Routine zget_SearchRequest and zget_PresentRequest fills
397 resultSetName/Id member with "default" instead of "Default".
399 Fixed memory leak in server. Request queue member wasn't freed.
401 Fixed nmem_exit so that memory is freed.
405 Revised the CCL parser utility to be thread safe.
407 Added function, oid_ent_to_oid, to replace the function
408 oid_getoidbyent, which is not thread safe.
410 * Added nmem_init and nmem_exit to initialize and release
411 NMEM resources. Function nmem_init should be called once in the
412 initial thread before NMEM/ODR is used. statserv.c and client.c
413 have been changed accordingly. The change was necessary to make
414 NMEM thread safe. The NMEM memory pool is shared amongst threads
415 in a process. Unix-based applications will still work fine without
418 Added NT Services interface for the the Z39.50 (statserv) Server.
419 Refer to the ztest.c source on the usage.
421 Windows 95/NT port using MSVC5.0. Project files are included in the
424 * Defined new 'global' handle for the retrieval (data1) system. The
425 new handled, data1_handle, describes the state of the data1 system.
426 This handle is passed as first argument to virtually all
427 data1 related routines. The functions data1_create and data1_destroy
428 creates and destroys a data1 handle respectively.
430 Added ODR encode stream member to all backend request structures
431 init, search, scan etc. This stream should be used to allocate all
432 memory used for the response when thread safe operation is needed.
434 Changed the comstack utility, cs_addstr, to be thread safe. The
435 returned hostname string returned by the function is now part the
438 Added comstack utility, cs_straddr, which replaces the tcpip_strtoaddr
439 function. The cs_straddr takes a COMSTACK handle as argument, so this
440 function must be used after cs_create and before bind/connect.
441 This function is thread safe.
443 Moved test server to 'ztest' directory - generic server code still
444 in 'server' directory.
446 Made prefix query (pquery.c) utility thread safe.
448 Added new function modifier YAZ_EXPORT to 'export' public DLL
449 functions when using windows (see include/yconfig.h).
451 Added definitions to the OID database (util/oid.c) (RVDM).
453 Added new BIB-1 diagnostic messages to the handler diagbib1_str.
455 Added call to ccl_rpn_delete in client program.
457 Added ODR argument to ccl_rpn_query and ccl_scan_query to provide
458 release of RPN structure.
460 Added support for C++, headers uses extern "C" for public definitions.
461 With input from RVDM.
463 In handling of SEQUENCE OF: Counter set to zero when SEQUENCE OF is absent.
464 Thanks to Ronald van der Meer (RVDM).
466 Added initializers (zget_ routines) for a number of PDUs. Thanks to RVDM.
468 Added support for private extensions to the OID database
469 (oid_setprivateoids()). Thanks to RVDM.
471 Added optional, physical ANY (key replication)
473 Fixed null-reference problem in GRS-1 output filter.
475 Proximity operator added to Prefix Query Format (PQF).
477 In test client command "base" accepts multiple databases.
479 Fixed bug in cs_close stack that caused trouble with WINSOCK.
483 Fixed tagging bug in ResourceReportResponse PDU encoder/decode.
485 Smallish bug-fixes in the new encoders/decoders (explain).
487 Bug fixed in DeleteRequest.
489 Fixed tagging bug of type 101 query in SearchRequest-Query PDU encoder/decoder.
491 Fixed tagging bug in ResourceReportResponse PDU encoder/decode.
493 Added SOIF syntax (using private OID for now) to retrieval module and client.
495 Added Update extended service.
497 Added SearchResult-1 additional info structure.
499 Added optional CCL (ISO8777) interpreter as separate module. Available
502 --- 1.2 1996/6/10 (1st anniversary release)
504 Added Summary record syntax. Lightly tested.
506 Added OPAC record syntax. Untested.
508 Added ResourceReport service encoders/decoders. Untested.
510 Fixed bug in z_Unit - wrong tagging on unitSystem.
512 Fixed bug in the DiagRecs decoder.
514 Added options for max PDU size and session timeout to frontend-server.
516 Added documentation of query-language parsers and other supporting utilities.
518 [frontend-server] Added Attribute set to the bend_scanrequest API.
520 [frontend-server] NextResultSetPosition was sometimes set incorrectly when
521 surrogate diagnostics were generated.
523 [retrieval] Allow multiple local values for attribute.
525 [retrieval] Allow multiple attributes per element in .abs files. index type.
527 [retrieval] Added Summary tagset, abstract syntax, and d1-node/ASN filter.
531 Minor changes, mostly specific to Zebra's requirements (retrieval)
535 Repaired bug in frontend server when running multiple listening
536 endpoints in dynamic mode.
538 z_External() now won't break if a known, ASN.1 value comes encapsulated
539 in an octet-string. The value will pass through unmodified in an Odr_oct.
541 Added a bit of code to the demo client to decode & display
542 ASN.1-structured records represented in the octet-aligned branch of
543 the EXTERNAL CHOICE. Thanks to CAS for prodding us to finally do this.
545 Added z_ext_getentbyref() to the ASN module. Doc updated.
547 * Completed the SCAN definition in the ASN module. This may break SCAN
548 code based on older YAZ-versions at compile-time. The fix is easy -
551 * Added 'displayTerm' and OtherInformation to the TermInfo structure
552 under the SCAN definition. Remember to initialize this, server-people.
554 Comstack should now support the WAIS protocol in TCP/IP mode. Note
555 that this does not extend to ODR and ASN.
557 Comstack allows insertion of established socket (primarily for
558 inetd-operation of servers). Doc updated.
560 Front-end server can now start from the inetd in TCP mode. Doc
567 Fixed small problem in SUTRS-filter. A newline was sometimes inserted before
568 the rank and record number.
570 Adjustments to the frontend server.
572 Fixed diagnostic BER dumper. It ignored the file argument.
576 Various changes to retrieval module.
578 Changed the union discriminators of the protocol files from enums to
579 ints paired with #defines.
581 *Changed oident.class to oident.oclass to avoid a reserved word in C++
584 *Changed operator in the RPN structure to 'roperator', again to avoid a
587 Fixed problems in Explain decoders/encoders.
591 Memory bug in log module fixed.
595 Occasional malloc() of 0 bytes fixed in d1_espec.c.
597 Bug in Explain DatabaseInfo module fixed.
599 Some '\r' snuck into one or two of the ret'l config tables. A curse on Windows.
603 The shift to v1.0 signals that we now consider the *core* functionality
604 of YAZ reasonably stable (the core being more or less equivalent to
605 Z39.50-1992). Some of the really nifty v3 stuff is still not heavily
606 tested (Explain not at all - though that will happen soonish).
608 Minor changes to code to support Windows port.
610 Various minor changes after we're getting to use GRS-1 & co. more.
612 Added Espec-1 format.
614 Added VisibleString field body type to GRS-1. It is illegal acc. to my copy
615 of the protocol and it cannot be selected when encoding (maps into 'string'
616 when decoding). Needed to talk to some servers.
618 Demo client can request simple element set names.
620 Added Diagnostic Format encoders/decoders.
622 Added simple Close handling to frontend server (no hooks for resource
623 reporting yet), and demonstration client.
625 Added cs_addrstr() command to COMSTACK to retrieve peer hostname/address.
629 Fixed bug in the frontend-server. The numberOfRecordsReturned field was
630 handled incorrectly when records were requested in the searchResponse. This
631 will only affect you if you use the frontend-server.
633 Added GRS-1 encoders/decoders to the service-level API. Lightly tested.
634 Test-client will ask for and print GRS1. Ztest will return dummy records
637 Added Explain encoders/decoders to the service-level API. Untested.
639 Added Extended Services: Item Order encoders and decoders to the Service-
640 level API. Untested. We could use a recent copy of the pertinent bits
641 of the ILL protocol to add those bits.
643 Added diagnostic format 1 encoders/decoders to the service-level API.
646 Moved pretty-printing of structure-wrappers ({..}) from odr_seq.c to
647 odr_cons.c, which causes a more correct output.
649 Fixed handling of searchRequest in frontend server. NextResultSetPosition
650 was always set to 0 when no records were requested in the searchRequest.
652 * Added better external-handling. This shouldn't harm old code that
653 *encodes* externals. It can break code that looks for a
654 'single-ASN1-type' representation, since those types that are known
655 are now decoded immediately. Look at the SUTRS sample code in
656 seshigh.c and client.c. Documentation updated.
658 Handling of structured records in bend_fetchresponse. Length -1 marks
659 structured record, type is deduced from format field.
662 Fairly quick maintenance release to add SUTRS support.
664 Fixed handling of SUTRS records in the demonstration client.
666 * Added format field to the bend_fetchrequest and bend_fetchresponce
667 structures of the backend API (frontend server). When the record is
668 returned, the value of the format field is mapped to an OID. The
669 value VAL_SUTRS will also cause a slightly different ASN.1 packaging
670 of the record. The special value VAL_NONE in the bend_request means
671 that no specific format was requested by the client. Documentation
672 updated accordingly. Test server (ztest) will return a fixed dummy
673 SUTRS record if your client requests SUTRS.
675 Documentation updated accordingly.
677 You can now set external libraries and RANLIB support in the top-level
681 First public release.