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