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