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