1 Possible compatibility problems with earlier versions marked with '*'.
3 *** ZOOM. Prefix for ZOOM definitions changed from Z3950_ to ZOOM_.
5 * ZOOM. Removed Z3950_connection_host. Use Z3950_connection_option_get
6 with key="host" to get same result.
8 * ZOOM. Added Z3950_record_clone and removed Z3950_resultset_get.
9 Function Z3950_resultset_record(s) returns references to records
10 "owned" by resultset. To become owner use Z3950_record_clone.
12 Function z_ext_record handles Extended Services. Thanks to
17 CCL Parser fix: ignore token comma when dealing with and-lists.
19 Documentation updates for COMSTACK.
21 * ZOOM changes. Query object renamed from Z3950_search to Z3950_query.
22 Changed prototype Z3950_records. For some functions, int parameters
23 were changed to size_t.
25 TCP/IP COMSTACK no longer uses getprotobyname to avoid memory leak
28 New MARC decode/display function, marc_display_exl, which properly rejects
29 non-ISO2709 records. YAZ client uses it.
33 Fix bug: local attribute set wasn't set correctly in PQF strings.
37 * Old Z39.50 codecs no longer supported.
39 Added ZOOM C binding. See http://zoom.z3950.org/
41 Renamed states for COMSTACKs to avoid confusion with events.
43 Implemented cs_look and proper cs_rcvconnect.
45 Fixed COMSTACK error that occurred on HPUX. Fix by Giannis Kosmas.
47 Configure detects POSIX threads on OpenBSD.
49 When sort flag 'i' was specified in yaz-client the caseSensitivy flag
50 was set to a wrong value. Thanks to Robert Sanderson for reporting this.
52 When error is returned from present handler, non-surrogate diagnostic
53 is returned in present response (and fetch handler is no longer called).
55 * Minor adjustments to pquery parser (PQF). Token characters may be
56 escaped by using backslash (C-style).
58 PQF parser allows string attribute values to be specified. For @attr,
59 non-numeric characters after the equal-sign are treated as strings
62 CCL trunction character may be defined (@truncation in file)
64 * function zget_ExtendedServicesRequest sets waitAction to
65 waitIfPossible (was wait).
67 Added cs_set_blocking to set change blocking mode of a COMSTACK. Thanks
70 CCL operator names may be set in field definition files (CCL_bibset).
71 See ccl/bib1 for an example.
73 Fixes in ASN.1 compiler for C++ compatibility.
75 * Renamed members "and" and "or" in struct Z_Operator to "op_and"
76 and "op_or" to avoid conflict with C++.
78 Fixed problem with GNU readline detection on Redhat 7.0.
80 Added step-size for Scan backend handler.
82 Fixed bug that made the frontend server crash when no attribute
83 set was specified for scan.
85 Front-end server automatically switches to original working directory
86 when installed as an NT service. Previously -w had to be specified to
89 Added extended attributes for retrieval module (data1), so that data1
90 records carry d1_readXML/SGML attributes. d1_read also supports
91 null-data rules ( <tag/>)
93 On UNIX when POSIX threads are available, a separate library libyazthread
94 is created. Programmers should link with that library and the yaz library
95 when using threads. The reason for the split was that some applications
96 on Linux, such as Apache, doesn't work well when using shared objects that
99 Added SSL support for the COMSTACK. You start yaz-client and yaz-ztest
100 (or any frontend server) in SSL mode by specifying ssl: followed by
101 address. Only tested on UNIX.
103 Added feature for CCL module. Virtual structure s=al or s=ol generates
104 and-list and or-list respectively instead of phrase search.
108 * Added prefix "yaz_" for the functions log_init.., log_file.. and
109 log_mask_str. This was done to avoid name conflicts with other libraries
110 (such as other PHP extensions).
112 Added raw OID member for preferred record syntax (request_format_raw)
113 and returned record syntax (output_format_raw) for backend fetch method.
115 Config file yaz-config now accepts options so that it returns specific
116 compile settings, etc. Thanks to Morten Bøgeskov <morten@bogeskov.dk>
118 Shared library support for UNIX using GNU libtool.
120 * Modified backend interface. Request/Response struct's replaced by
121 one read/write C struct. For example bend_fetchrequest and
122 bend_fetchresult have been replaced by single bend_fetch_rr struct.
123 Every handler - even search has to be registered in bend_init
124 handler. This means that the YAZ library no longer refers to
125 external functions and it makes it possible to make the whole
126 thing a single DLL/SO.
128 Added Segment handler for backend server.
130 Added Zmbol/Zebra administrative functions to YAZ client.
132 Threaded frontend server on UNIX (when POSIX Threads are available).
133 Starting the server with option -T enables multi-threading.
137 Added configure option --enable-comp/disable-comp to control use
138 of YAZ ASN.1 compiler. Use --disable-comp to use the old *coders
139 located in sub directory asn.
141 YAZ ASN.1 compiler renamed to yaz-comp in sub directory. It's installed
142 in ${exec_prefix}/bin along with the other programs yaz-client and
145 GNU automake used to maintain makefiles.
149 Changed retrieval module so that we can load records with no abstract
150 syntax defined. Tagpaths in these records are fully composed of string
153 Implemented ISO ILL protocol. Refer to stuff in sub directory ill.
157 On UNIX, the generated makefile now supports a proper 'make install'.
158 The prefix can be set via GNU configure to set the install location
159 (default is /usr/local).
161 * YAZ programs client and ztest were renamed to yaz-client and
162 yaz-ztest to avoid conflicts when users install YAZ in "standard"
163 locations, such as /usr/bin,/usr/local/bin,etc.
165 * YAZ Header files were moved from include to include/yaz. YAZ Header
166 files are referred to as include <yaz/log.h> rather than <log.h>.
167 The YAZ include path (-I ..) is therefore the same as before. Programmers
168 should update their #include statements or use -Ipath/include/yaz
169 instead. The main motivation for doing this change is that YAZ header files
170 can be installed in "standard" locations /usr/include,/usr/local/include
171 without introducing conflicts, since ALL YAZ header files are stored
172 in subdirectory yaz (under /usr/include for example).
174 Compilation of YAZ for WIN32 is now handled by an nmake-style makefile
175 rather than project/workspace files. We switched because project files
176 are incompatible between Visual C++ 5 and 6. Refer to windows.txt for
179 Changed name of logging function, logf, to yaz_log, to prevent name
180 clash with some math-log functions. The YAZ header log.h defines logf
181 to yaz_log (#define) so there should be no incompatibilities by this
184 Added bend_start/bend_stop handlers for server. These handler are
185 called on start/stop of server. For windows they are called whenever
186 a service is started/stopped.
188 * YAZ now auto-generates decoders/encoders for the Z39.50 protocol using
189 a fairly small ASN.1 compiler written in Tcl. The compiler is located
190 in util/yc.tcl. The auto-generated C code structures are, in a few
191 cases, incompatible with the old decoders. There are differences in the
192 following C structures Z_DiagRec, Z_External, Z_SortRequest, Z_SortResponse,
193 Z_AttributesPlusTerm, Z_ProximityOperator, Z_DefaultDiagFormat.
194 The preprocessor variable ASN_COMPILED is defined when the compiled
195 ASN.1 is being used. Encoder/decoder routines as well as the Z39.50
196 protocol ASN.1 is located sub directory <tt>z39.50</tt>. If you
197 wish to use the old encoders/decoders you can specify --disable-yc
200 Assigned OID for old DB Update (VAL_DBUPDATE0). Updated YAZ compiled
201 version so that it supports both new - and old version of DB Update
203 * Added 'name' parameter to ODR encoder/decoder routines to facilitate
204 pretty ODR print. Updated whole Z39.50 encoder/decoder to reflect the
205 change. The name parameter can be set to 0 in which no name is specified
206 for the construction. The macros odr_implicit and odr_explicit sets name
207 parameter to zero for the construction involved. New macros
208 odr_implicit_tag and odr_explicit_tag are similar to the others,
209 except that a name parameter is added. For programmers' that don't use
210 ODR they probably only need to change the call to z_APDU and z_External.
212 Added access control facility by interfacing the TCP wrapper library.
213 YAZ automatically attempts to find the TCP wrapper Library (-lwrap) and
214 tcpd.h on Unix systems. For the server, option -d<daemon> specifies the
215 name of the daemon and enables the access control as specified in
216 hosts.allow/hosts.deny. Refer to man pages tcpd(8) and hosts_access(5).
218 Fixed memory leak in ccl_find_str and ccl_qual_rm. Thanks to Hans van
219 den Dool <H.M.vdnDool@kub.nl>.
221 Added reference ID parameter to most functions in server API - refer
222 to backend.h. Thanks to Hans van den Dool <H.M.vdnDool@kub.nl>.
224 Changed name of ccl library to libccl.a (was ccl.a).
226 Fixed bug in decoder for Explain (Category TargetInfo).
228 Added support for GNU readline in client. Thanks to Jacob Poulsen
229 <ja7@dbc.dk>. GNU configure attempts to detect if readline is available.
231 * CHANGED DEFINITION OF ES: UPDATE (INCLUDING THE OID) to reflect the
232 new definition from the ZIG. NOTE THIS IF YOU HAVE AN UPDATE
233 IMPLEMENTATION! This change was made to the development version before
234 the ZIG decided to retract the amendment. If any users MUST be
235 compatible with the original Update definition, PLEASE CONTACT US, and
236 we will include a separate definition corresponding to the old Update
237 ES. Note that because of the change to the ASN.1 of the
238 TaskPackageRecordStructure we cannot define a single structure that
239 will support both versions.
241 * Added const modifier to buffer parameter for some ODR/BER encoding
242 routines: ber_dectag, ber_declen, odp_more_chunks, completeBER,
243 completeWAIS, odr_dumpBER.
245 Fixed bug in client.c which caused a crash when a scanResponse didn't
246 contain positionOfTerm.
248 * Fixed inconsistency in the ScanResponse/ListEntries protocol. This
249 * will cause an error in a client if a non-YAZ target sends both a
250 * list of Scan entries and non-surrogate diagnostics.
252 Retrieval module enhancements. Tag sets may be typed in the reference
253 to it. From the .abs-file the "tagset" directive takes a third optional
254 integer type for the tag set referenced. From a .tag-file the "include"
255 directive takes a third optional type as well. The old "type" directive
256 in the tag set itself is still recognized but acts as the default type
259 Backend interface change. Individual Scan terms returned from bend_scan
260 may also be tagged as Surrogate Diagnostics. Refer to struct scan_entry
261 in include/backend.h.
263 Retrieval module enhancements. Multiple tag sets and attribute sets may
264 be specified in abstract syntax specs. Revised the error/warning for
265 logging messages reported by the retrieval module when reading the
268 Object Identifier system (oid_..) changed. The API is backwards
269 compatible but the oid-routines now allocates new OID's when needed.
270 Raw OID's may be specified in oid_getvalbyname.
272 YAZ now uses GNU configure to generate Makefile(s).
274 * Minor changes in some of the member names of DeleteResultSetRequest and
275 DeleteResultSetResponse. See include/proto.h.
277 * Changed some C definitions regarding EXPLAIN record syntax (prt-exp.h)
278 and added member 'languages' in TargetInfo (which was missing).
280 Changed the way attribute sets are handled in the retrieval
281 module. These are now cached, just like the abstract syntaxes
284 Changed YAZ so that it links with compiled ASN.1.
286 Added Explain-schema definitions and mapping routines. The following
287 Explain categories have been implemented: AttributeDetails,
288 AttributeSetInfo, DatabaseInfo, CategoryList and TargetInfo.
290 Fixed minor bug in Windows version of Server Library.
292 --- 1.4pl2+ 1998/4/17 (Released with Zebra)
294 Added Extended Services to server (backend.h). Thanks to Charles Woodfield.
296 Added EXTERNAL: UNIverse Resource Report (non-standard).
298 Implemened odr_enum and odr_set_of functions to handle ASN.1 types
299 ENUMERATED and SET OF.
301 * Added 'const' to some of the char pointer arguments for the
302 functions, data1_read_node, data1_getelementbytagname,
303 data1_insert_taggeddata, data1_getesetbyname, data1_getelementbyname,
306 Fixed bug in data1_insert_taggeddata - the last_child member of
307 parent wasn't initialised.
309 * Changed data1_read_record and data1_read_node so that the supplied
310 "SGML"-buffer is read-only. In particular the resulting data1 - tree
311 doesn't refer to any parts of the "SGML"-buffer.
313 Fixed bug in server library (Windows version of statserv_remove).
315 * Changed code so that it compiles as C++. The type definition
316 of Odr_fun which is a member of Odr_arm was changed. The result is,
317 that an explicit typecast is needed for the fun pointer when
318 using Odr_arm - as in:
319 {1, -1, -1, Z_IdAuthentication_idPass, (Odr_fun)z_IdPass},
321 Updated TagSet-G and -M definitions (tagsetm.tag and tagsetg.tag).
323 Implemented the new structured date and time definition as approved
324 by the ZIG. Added schemaId element to the specificTag in Espec-1
325 (also approved at the last ZIG). Thanks to RVDM.
327 Added some Object identifiers (RVDM).
329 Changed the Update Extended Service (RVDM).
331 Added command "refid" to client which specifies referenceId for
332 the following requests.
334 Implemented extended service handling for server. See ztest.c
335 for an example as well as backend.h. New handlers are registerd
338 * Changed interface for sort in server.
340 Added new members to statserv_options_block. It allows a server
341 to read options from another source than just the command line. Thanks
342 to Charles Woodfield.
344 * Changed definition of Z_Triple in file prt-grs.h - member boolean
345 renamed to zboolean. Some C++ compilers complained about the name.
347 Minor changes to gils.abs. Added index 's' (sort) on title
348 and date/time-last-modified.
352 Fixed bug in server library regarding inetd mode (-i). This bug
353 was introduced by release 1.4.
357 Added sort facility in client and backend server interface.
359 Fixed problem with dependencies in Makefile(s).
361 Fixed bugs for encoders/decoders of extended services and
364 Implemented sub-tree feature for schemas. Sub-trees are
365 referenced in *.abs-files. See explain.abs for an example
366 of the use of this feature.
368 Modified bib1.att; local attributes for ANY didn't include
369 ANY itself (only affects use of the retrieval module).
371 Fixed bug in plain SGML reader in function data1_read_node:
372 tags with prefix "var" was incorrectly interpreted as variants.
374 Added feature "sub-schemas" to enable references to - and definitions
375 of - group of elements.
377 * Removed member parent from type data1_element (in data1.h).
379 Implemented function odr_nullval() that returns the value of
382 * Removed member num_children from data1_node (in data1.h).
384 Made NT service interface part of the server library. The
385 function statserv_main uses the NT service when required and
386 calls the statserv_start / statserv_close routines.
388 Routine zget_SearchRequest and zget_PresentRequest fills
389 resultSetName/Id member with "default" instead of "Default".
391 Fixed memory leak in server. Request queue member wasn't freed.
393 Fixed nmem_exit so that memory is freed.
397 Revised the CCL parser utility to be thread safe.
399 Added function, oid_ent_to_oid, to replace the function
400 oid_getoidbyent, which is not thread safe.
402 * Added nmem_init and nmem_exit to initialize and release
403 NMEM resources. Function nmem_init should be called once in the
404 initial thread before NMEM/ODR is used. statserv.c and client.c
405 have been changed accordingly. The change was necessary to make
406 NMEM thread safe. The NMEM memory pool is shared amongst threads
407 in a process. Unix-based applications will still work fine without
410 Added NT Services interface for the the Z39.50 (statserv) Server.
411 Refer to the ztest.c source on the usage.
413 Windows 95/NT port using MSVC5.0. Project files are included in the
416 * Defined new 'global' handle for the retrieval (data1) system. The
417 new handled, data1_handle, describes the state of the data1 system.
418 This handle is passed as first argument to virtually all
419 data1 related routines. The functions data1_create and data1_destroy
420 creates and destroys a data1 handle respectively.
422 Added ODR encode stream member to all backend request structures
423 init, search, scan etc. This stream should be used to allocate all
424 memory used for the response when thread safe operation is needed.
426 Changed the comstack utility, cs_addstr, to be thread safe. The
427 returned hostname string returned by the function is now part the
430 Added comstack utility, cs_straddr, which replaces the tcpip_strtoaddr
431 function. The cs_straddr takes a COMSTACK handle as argument, so this
432 function must be used after cs_create and before bind/connect.
433 This function is thread safe.
435 Moved test server to 'ztest' directory - generic server code still
436 in 'server' directory.
438 Made prefix query (pquery.c) utility thread safe.
440 Added new function modifier YAZ_EXPORT to 'export' public DLL
441 functions when using windows (see include/yconfig.h).
443 Added definitions to the OID database (util/oid.c) (RVDM).
445 Added new BIB-1 diagnostic messages to the handler diagbib1_str.
447 Added call to ccl_rpn_delete in client program.
449 Added ODR argument to ccl_rpn_query and ccl_scan_query to provide
450 release of RPN structure.
452 Added support for C++, headers uses extern "C" for public definitions.
453 With input from RVDM.
455 In handling of SEQUENCE OF: Counter set to zero when SEQUENCE OF is absent.
456 Thanks to Ronald van der Meer (RVDM).
458 Added initializers (zget_ routines) for a number of PDUs. Thanks to RVDM.
460 Added support for private extensions to the OID database
461 (oid_setprivateoids()). Thanks to RVDM.
463 Added optional, physical ANY (key replication)
465 Fixed null-reference problem in GRS-1 output filter.
467 Proximity operator added to Prefix Query Format (PQF).
469 In test client command "base" accepts multiple databases.
471 Fixed bug in cs_close stack that caused trouble with WINSOCK.
475 Fixed tagging bug in ResourceReportResponse PDU encoder/decode.
477 Smallish bug-fixes in the new encoders/decoders (explain).
479 Bug fixed in DeleteRequest.
481 Fixed tagging bug of type 101 query in SearchRequest-Query PDU encoder/decoder.
483 Fixed tagging bug in ResourceReportResponse PDU encoder/decode.
485 Added SOIF syntax (using private OID for now) to retrieval module and client.
487 Added Update extended service.
489 Added SearchResult-1 additional info structure.
491 Added optional CCL (ISO8777) interpreter as separate module. Available
494 --- 1.2 1996/6/10 (1st anniversary release)
496 Added Summary record syntax. Lightly tested.
498 Added OPAC record syntax. Untested.
500 Added ResourceReport service encoders/decoders. Untested.
502 Fixed bug in z_Unit - wrong tagging on unitSystem.
504 Fixed bug in the DiagRecs decoder.
506 Added options for max PDU size and session timeout to frontend-server.
508 Added documentation of query-language parsers and other supporting utilities.
510 [frontend-server] Added Attribute set to the bend_scanrequest API.
512 [frontend-server] NextResultSetPosition was sometimes set incorrectly when
513 surrogate diagnostics were generated.
515 [retrieval] Allow multiple local values for attribute.
517 [retrieval] Allow multiple attributes per element in .abs files. index type.
519 [retrieval] Added Summary tagset, abstract syntax, and d1-node/ASN filter.
523 Minor changes, mostly specific to Zebra's requirements (retrieval)
527 Repaired bug in frontend server when running multiple listening
528 endpoints in dynamic mode.
530 z_External() now won't break if a known, ASN.1 value comes encapsulated
531 in an octet-string. The value will pass through unmodified in an Odr_oct.
533 Added a bit of code to the demo client to decode & display
534 ASN.1-structured records represented in the octet-aligned branch of
535 the EXTERNAL CHOICE. Thanks to CAS for prodding us to finally do this.
537 Added z_ext_getentbyref() to the ASN module. Doc updated.
539 * Completed the SCAN definition in the ASN module. This may break SCAN
540 code based on older YAZ-versions at compile-time. The fix is easy -
543 * Added 'displayTerm' and OtherInformation to the TermInfo structure
544 under the SCAN definition. Remember to initialize this, server-people.
546 Comstack should now support the WAIS protocol in TCP/IP mode. Note
547 that this does not extend to ODR and ASN.
549 Comstack allows insertion of established socket (primarily for
550 inetd-operation of servers). Doc updated.
552 Front-end server can now start from the inetd in TCP mode. Doc
559 Fixed small problem in SUTRS-filter. A newline was sometimes inserted before
560 the rank and record number.
562 Adjustments to the frontend server.
564 Fixed diagnostic BER dumper. It ignored the file argument.
568 Various changes to retrieval module.
570 Changed the union discriminators of the protocol files from enums to
571 ints paired with #defines.
573 *Changed oident.class to oident.oclass to avoid a reserved word in C++
576 *Changed operator in the RPN structure to 'roperator', again to avoid a
579 Fixed problems in Explain decoders/encoders.
583 Memory bug in log module fixed.
587 Occasional malloc() of 0 bytes fixed in d1_espec.c.
589 Bug in Explain DatabaseInfo module fixed.
591 Some '\r' snuck into one or two of the ret'l config tables. A curse on Windows.
595 The shift to v1.0 signals that we now consider the *core* functionality
596 of YAZ reasonably stable (the core being more or less equivalent to
597 Z39.50-1992). Some of the really nifty v3 stuff is still not heavily
598 tested (Explain not at all - though that will happen soonish).
600 Minor changes to code to support Windows port.
602 Various minor changes after we're getting to use GRS-1 & co. more.
604 Added Espec-1 format.
606 Added VisibleString field body type to GRS-1. It is illegal acc. to my copy
607 of the protocol and it cannot be selected when encoding (maps into 'string'
608 when decoding). Needed to talk to some servers.
610 Demo client can request simple element set names.
612 Added Diagnostic Format encoders/decoders.
614 Added simple Close handling to frontend server (no hooks for resource
615 reporting yet), and demonstration client.
617 Added cs_addrstr() command to COMSTACK to retrieve peer hostname/address.
621 Fixed bug in the frontend-server. The numberOfRecordsReturned field was
622 handled incorrectly when records were requested in the searchResponse. This
623 will only affect you if you use the frontend-server.
625 Added GRS-1 encoders/decoders to the service-level API. Lightly tested.
626 Test-client will ask for and print GRS1. Ztest will return dummy records
629 Added Explain encoders/decoders to the service-level API. Untested.
631 Added Extended Services: Item Order encoders and decoders to the Service-
632 level API. Untested. We could use a recent copy of the pertinent bits
633 of the ILL protocol to add those bits.
635 Added diagnostic format 1 encoders/decoders to the service-level API.
638 Moved pretty-printing of structure-wrappers ({..}) from odr_seq.c to
639 odr_cons.c, which causes a more correct output.
641 Fixed handling of searchRequest in frontend server. NextResultSetPosition
642 was always set to 0 when no records were requested in the searchRequest.
644 * Added better external-handling. This shouldn't harm old code that
645 *encodes* externals. It can break code that looks for a
646 'single-ASN1-type' representation, since those types that are known
647 are now decoded immediately. Look at the SUTRS sample code in
648 seshigh.c and client.c. Documentation updated.
650 Handling of structured records in bend_fetchresponse. Length -1 marks
651 structured record, type is deduced from format field.
654 Fairly quick maintenance release to add SUTRS support.
656 Fixed handling of SUTRS records in the demonstration client.
658 * Added format field to the bend_fetchrequest and bend_fetchresponce
659 structures of the backend API (frontend server). When the record is
660 returned, the value of the format field is mapped to an OID. The
661 value VAL_SUTRS will also cause a slightly different ASN.1 packaging
662 of the record. The special value VAL_NONE in the bend_request means
663 that no specific format was requested by the client. Documentation
664 updated accordingly. Test server (ztest) will return a fixed dummy
665 SUTRS record if your client requests SUTRS.
667 Documentation updated accordingly.
669 You can now set external libraries and RANLIB support in the top-level
673 First public release.