1 Possible compatibility problems with earlier versions marked with '*'.
3 On UNIX when POSIX threads are available, a separate library libyazthread
4 is created. Programmers should link with that library and the yaz library
5 when using threads. The reason for the split was that some applications
6 on Linux, such as Apache, doesn't work well when using shared objects that
9 Added SSL support for the COMSTACK. You start yaz-client and yaz-ztest
10 (or any frontend server) in SSL mode by specifying ssl: followed by
13 Added feature for CCL module. Virtual structure s=al or s=ol generates
14 and-list and or-list respectively instead of phrase search.
18 * Added prefix "yaz_" for the functions log_init.., log_file.. and
19 log_mask_str. This was done to avoid name conflicts with other libraries
20 (such as other PHP extensions).
22 Added raw OID member for preferred record syntax (request_format_raw)
23 and returned record syntax (output_format_raw) for backend fetch method.
25 Config file yaz-config now accepts options so that it returns specific
26 compile settings, etc. Thanks to Morten Bøgeskov <morten@bogeskov.dk>
28 Shared library support for UNIX using GNU libtool.
30 * Modified backend interface. Request/Response struct's replaced by
31 one read/write C struct. For example bend_fetchrequest and
32 bend_fetchresult have been replaced by single bend_fetch_rr struct.
33 Every handler - even search has to be registered in bend_init
34 handler. This means that the YAZ library no longer refers to
35 external functions and it makes it possible to make the whole
36 thing a single DLL/SO.
38 Added Segment handler for backend server.
40 Added Zmbol/Zebra administrative functions to YAZ client.
42 Threaded frontend server on UNIX (when POSIX Threads are available).
43 Starting the server with option -T enables multi-threading.
47 Added configure option --enable-comp/disable-comp to control use
48 of YAZ ASN.1 compiler. Use --disable-comp to use the old *coders
49 located in sub directory asn.
51 YAZ ASN.1 compiler renamed to yaz-comp in sub directory. It's installed
52 in ${exec_prefix}/bin along with the other programs yaz-client and
55 GNU automake used to maintain makefiles.
59 Changed retrieval module so that we can load records with no abstract
60 syntax defined. Tagpaths in these records are fully composed of string
63 Implemented ISO ILL protocol. Refer to stuff in sub directory ill.
67 On UNIX, the generated makefile now supports a proper 'make install'.
68 The prefix can be set via GNU configure to set the install location
69 (default is /usr/local).
71 * YAZ programs client and ztest were renamed to yaz-client and
72 yaz-ztest to avoid conflicts when users install YAZ in "standard"
73 locations, such as /usr/bin,/usr/local/bin,etc.
75 * YAZ Header files were moved from include to include/yaz. YAZ Header
76 files are referred to as include <yaz/log.h> rather than <log.h>.
77 The YAZ include path (-I ..) is therefore the same as before. Programmers
78 should update their #include statements or use -Ipath/include/yaz
79 instead. The main motivation for doing this change is that YAZ header files
80 can be installed in "standard" locations /usr/include,/usr/local/include
81 without introducing conflicts, since ALL YAZ header files are stored
82 in subdirectory yaz (under /usr/include for example).
84 Compilation of YAZ for WIN32 is now handled by an nmake-style makefile
85 rather than project/workspace files. We switched because project files
86 are incompatible between Visual C++ 5 and 6. Refer to windows.txt for
89 Changed name of logging function, logf, to yaz_log, to prevent name
90 clash with some math-log functions. The YAZ header log.h defines logf
91 to yaz_log (#define) so there should be no incompatibilities by this
94 Added bend_start/bend_stop handlers for server. These handler are
95 called on start/stop of server. For windows they are called whenever
96 a service is started/stopped.
98 * YAZ now auto-generates decoders/encoders for the Z39.50 protocol using
99 a fairly small ASN.1 compiler written in Tcl. The compiler is located
100 in util/yc.tcl. The auto-generated C code structures are, in a few
101 cases, incompatible with the old decoders. There are differences in the
102 following C structures Z_DiagRec, Z_External, Z_SortRequest, Z_SortResponse,
103 Z_AttributesPlusTerm, Z_ProximityOperator, Z_DefaultDiagFormat.
104 The preprocessor variable ASN_COMPILED is defined when the compiled
105 ASN.1 is being used. Encoder/decoder routines as well as the Z39.50
106 protocol ASN.1 is located sub directory <tt>z39.50</tt>. If you
107 wish to use the old encoders/decoders you can specify --disable-yc
110 Assigned OID for old DB Update (VAL_DBUPDATE0). Updated YAZ compiled
111 version so that it supports both new - and old version of DB Update
113 * Added 'name' parameter to ODR encoder/decoder routines to facilitate
114 pretty ODR print. Updated whole Z39.50 encoder/decoder to reflect the
115 change. The name parameter can be set to 0 in which no name is specified
116 for the construction. The macros odr_implicit and odr_explicit sets name
117 parameter to zero for the construction involved. New macros
118 odr_implicit_tag and odr_explicit_tag are similar to the others,
119 except that a name parameter is added. For programmers' that don't use
120 ODR they probably only need to change the call to z_APDU and z_External.
122 Added access control facility by interfacing the TCP wrapper library.
123 YAZ automatically attempts to find the TCP wrapper Library (-lwrap) and
124 tcpd.h on Unix systems. For the server, option -d<daemon> specifies the
125 name of the daemon and enables the access control as specified in
126 hosts.allow/hosts.deny. Refer to man pages tcpd(8) and hosts_access(5).
128 Fixed memory leak in ccl_find_str and ccl_qual_rm. Thanks to Hans van
129 den Dool <H.M.vdnDool@kub.nl>.
131 Added reference ID parameter to most functions in server API - refer
132 to backend.h. Thanks to Hans van den Dool <H.M.vdnDool@kub.nl>.
134 Changed name of ccl library to libccl.a (was ccl.a).
136 Fixed bug in decoder for Explain (Category TargetInfo).
138 Added support for GNU readline in client. Thanks to Jacob Poulsen
139 <ja7@dbc.dk>. GNU configure attempts to detect if readline is available.
141 * CHANGED DEFINITION OF ES: UPDATE (INCLUDING THE OID) to reflect the
142 new definition from the ZIG. NOTE THIS IF YOU HAVE AN UPDATE
143 IMPLEMENTATION! This change was made to the development version before
144 the ZIG decided to retract the amendment. If any users MUST be
145 compatible with the original Update definition, PLEASE CONTACT US, and
146 we will include a separate definition corresponding to the old Update
147 ES. Note that because of the change to the ASN.1 of the
148 TaskPackageRecordStructure we cannot define a single structure that
149 will support both versions.
151 * Added const modifier to buffer parameter for some ODR/BER encoding
152 routines: ber_dectag, ber_declen, odp_more_chunks, completeBER,
153 completeWAIS, odr_dumpBER.
155 Fixed bug in client.c which caused a crash when a scanResponse didn't
156 contain positionOfTerm.
158 * Fixed inconsistency in the ScanResponse/ListEntries protocol. This
159 * will cause an error in a client if a non-YAZ target sends both a
160 * list of Scan entries and non-surrogate diagnostics.
162 Retrieval module enhancements. Tag sets may be typed in the reference
163 to it. From the .abs-file the "tagset" directive takes a third optional
164 integer type for the tag set referenced. From a .tag-file the "include"
165 directive takes a third optional type as well. The old "type" directive
166 in the tag set itself is still recognized but acts as the default type
169 Backend interface change. Individual Scan terms returned from bend_scan
170 may also be tagged as Surrogate Diagnostics. Refer to struct scan_entry
171 in include/backend.h.
173 Retrieval module enhancements. Multiple tag sets and attribute sets may
174 be specified in abstract syntax specs. Revised the error/warning for
175 logging messages reported by the retrieval module when reading the
178 Object Identifier system (oid_..) changed. The API is backwards
179 compatible but the oid-routines now allocates new OID's when needed.
180 Raw OID's may be specified in oid_getvalbyname.
182 YAZ now uses GNU configure to generate Makefile(s).
184 * Minor changes in some of the member names of DeleteResultSetRequest and
185 DeleteResultSetResponse. See include/proto.h.
187 * Changed some C definitions regarding EXPLAIN record syntax (prt-exp.h)
188 and added member 'languages' in TargetInfo (which was missing).
190 Changed the way attribute sets are handled in the retrieval
191 module. These are now cached, just like the abstract syntaxes
194 Changed YAZ so that it links with compiled ASN.1.
196 Added Explain-schema definitions and mapping routines. The following
197 Explain categories have been implemented: AttributeDetails,
198 AttributeSetInfo, DatabaseInfo, CategoryList and TargetInfo.
200 Fixed minor bug in Windows version of Server Library.
202 --- 1.4pl2+ 1998/4/17 (Released with Zebra)
204 Added Extended Services to server (backend.h). Thanks to Charles Woodfield.
206 Added EXTERNAL: UNIverse Resource Report (non-standard).
208 Implemened odr_enum and odr_set_of functions to handle ASN.1 types
209 ENUMERATED and SET OF.
211 * Added 'const' to some of the char pointer arguments for the
212 functions, data1_read_node, data1_getelementbytagname,
213 data1_insert_taggeddata, data1_getesetbyname, data1_getelementbyname,
216 Fixed bug in data1_insert_taggeddata - the last_child member of
217 parent wasn't initialised.
219 * Changed data1_read_record and data1_read_node so that the supplied
220 "SGML"-buffer is read-only. In particular the resulting data1 - tree
221 doesn't refer to any parts of the "SGML"-buffer.
223 Fixed bug in server library (Windows version of statserv_remove).
225 * Changed code so that it compiles as C++. The type definition
226 of Odr_fun which is a member of Odr_arm was changed. The result is,
227 that an explicit typecast is needed for the fun pointer when
228 using Odr_arm - as in:
229 {1, -1, -1, Z_IdAuthentication_idPass, (Odr_fun)z_IdPass},
231 Updated TagSet-G and -M definitions (tagsetm.tag and tagsetg.tag).
233 Implemented the new structured date and time definition as approved
234 by the ZIG. Added schemaId element to the specificTag in Espec-1
235 (also approved at the last ZIG). Thanks to RVDM.
237 Added some Object identifiers (RVDM).
239 Changed the Update Extended Service (RVDM).
241 Added command "refid" to client which specifies referenceId for
242 the following requests.
244 Implemented extended service handling for server. See ztest.c
245 for an example as well as backend.h. New handlers are registerd
248 * Changed interface for sort in server.
250 Added new members to statserv_options_block. It allows a server
251 to read options from another source than just the command line. Thanks
252 to Charles Woodfield.
254 * Changed definition of Z_Triple in file prt-grs.h - member boolean
255 renamed to zboolean. Some C++ compilers complained about the name.
257 Minor changes to gils.abs. Added index 's' (sort) on title
258 and date/time-last-modified.
262 Fixed bug in server library regarding inetd mode (-i). This bug
263 was introduced by release 1.4.
267 Added sort facility in client and backend server interface.
269 Fixed problem with dependencies in Makefile(s).
271 Fixed bugs for encoders/decoders of extended services and
274 Implemented sub-tree feature for schemas. Sub-trees are
275 referenced in *.abs-files. See explain.abs for an example
276 of the use of this feature.
278 Modified bib1.att; local attributes for ANY didn't include
279 ANY itself (only affects use of the retrieval module).
281 Fixed bug in plain SGML reader in function data1_read_node:
282 tags with prefix "var" was incorrectly interpreted as variants.
284 Added feature "sub-schemas" to enable references to - and definitions
285 of - group of elements.
287 * Removed member parent from type data1_element (in data1.h).
289 Implemented function odr_nullval() that returns the value of
292 * Removed member num_children from data1_node (in data1.h).
294 Made NT service interface part of the server library. The
295 function statserv_main uses the NT service when required and
296 calls the statserv_start / statserv_close routines.
298 Routine zget_SearchRequest and zget_PresentRequest fills
299 resultSetName/Id member with "default" instead of "Default".
301 Fixed memory leak in server. Request queue member wasn't freed.
303 Fixed nmem_exit so that memory is freed.
307 Revised the CCL parser utility to be thread safe.
309 Added function, oid_ent_to_oid, to replace the function
310 oid_getoidbyent, which is not thread safe.
312 * Added nmem_init and nmem_exit to initialize and release
313 NMEM resources. Function nmem_init should be called once in the
314 initial thread before NMEM/ODR is used. statserv.c and client.c
315 have been changed accordingly. The change was necessary to make
316 NMEM thread safe. The NMEM memory pool is shared amongst threads
317 in a process. Unix-based applications will still work fine without
320 Added NT Services interface for the the Z39.50 (statserv) Server.
321 Refer to the ztest.c source on the usage.
323 Windows 95/NT port using MSVC5.0. Project files are included in the
326 * Defined new 'global' handle for the retrieval (data1) system. The
327 new handled, data1_handle, describes the state of the data1 system.
328 This handle is passed as first argument to virtually all
329 data1 related routines. The functions data1_create and data1_destroy
330 creates and destroys a data1 handle respectively.
332 Added ODR encode stream member to all backend request structures
333 init, search, scan etc. This stream should be used to allocate all
334 memory used for the response when thread safe operation is needed.
336 Changed the comstack utility, cs_addstr, to be thread safe. The
337 returned hostname string returned by the function is now part the
340 Added comstack utility, cs_straddr, which replaces the tcpip_strtoaddr
341 function. The cs_straddr takes a COMSTACK handle as argument, so this
342 function must be used after cs_create and before bind/connect.
343 This function is thread safe.
345 Moved test server to 'ztest' directory - generic server code still
346 in 'server' directory.
348 Made prefix query (pquery.c) utility thread safe.
350 Added new function modifier YAZ_EXPORT to 'export' public DLL
351 functions when using windows (see include/yconfig.h).
353 Added definitions to the OID database (util/oid.c) (RVDM).
355 Added new BIB-1 diagnostic messages to the handler diagbib1_str.
357 Added call to ccl_rpn_delete in client program.
359 Added ODR argument to ccl_rpn_query and ccl_scan_query to provide
360 release of RPN structure.
362 Added support for C++, headers uses extern "C" for public definitions.
363 With input from RVDM.
365 In handling of SEQUENCE OF: Counter set to zero when SEQUENCE OF is absent.
366 Thanks to Ronald van der Meer (RVDM).
368 Added initializers (zget_ routines) for a number of PDUs. Thanks to RVDM.
370 Added support for private extensions to the OID database
371 (oid_setprivateoids()). Thanks to RVDM.
373 Added optional, physical ANY (key replication)
375 Fixed null-reference problem in GRS-1 output filter.
377 Proximity operator added to Prefix Query Format (PQF).
379 In test client command "base" accepts multiple databases.
381 Fixed bug in cs_close stack that caused trouble with WINSOCK.
385 Fixed tagging bug in ResourceReportResponse PDU encoder/decode.
387 Smallish bug-fixes in the new encoders/decoders (explain).
389 Bug fixed in DeleteRequest.
391 Fixed tagging bug of type 101 query in SearchRequest-Query PDU encoder/decoder.
393 Fixed tagging bug in ResourceReportResponse PDU encoder/decode.
395 Added SOIF syntax (using private OID for now) to retrieval module and client.
397 Added Update extended service.
399 Added SearchResult-1 additional info structure.
401 Added optional CCL (ISO8777) interpreter as separate module. Available
404 --- 1.2 1996/6/10 (1st anniversary release)
406 Added Summary record syntax. Lightly tested.
408 Added OPAC record syntax. Untested.
410 Added ResourceReport service encoders/decoders. Untested.
412 Fixed bug in z_Unit - wrong tagging on unitSystem.
414 Fixed bug in the DiagRecs decoder.
416 Added options for max PDU size and session timeout to frontend-server.
418 Added documentation of query-language parsers and other supporting utilities.
420 [frontend-server] Added Attribute set to the bend_scanrequest API.
422 [frontend-server] NextResultSetPosition was sometimes set incorrectly when
423 surrogate diagnostics were generated.
425 [retrieval] Allow multiple local values for attribute.
427 [retrieval] Allow multiple attributes per element in .abs files. index type.
429 [retrieval] Added Summary tagset, abstract syntax, and d1-node/ASN filter.
433 Minor changes, mostly specific to Zebra's requirements (retrieval)
437 Repaired bug in frontend server when running multiple listening
438 endpoints in dynamic mode.
440 z_External() now won't break if a known, ASN.1 value comes encapsulated
441 in an octet-string. The value will pass through unmodified in an Odr_oct.
443 Added a bit of code to the demo client to decode & display
444 ASN.1-structured records represented in the octet-aligned branch of
445 the EXTERNAL CHOICE. Thanks to CAS for prodding us to finally do this.
447 Added z_ext_getentbyref() to the ASN module. Doc updated.
449 * Completed the SCAN definition in the ASN module. This may break SCAN
450 code based on older YAZ-versions at compile-time. The fix is easy -
453 * Added 'displayTerm' and OtherInformation to the TermInfo structure
454 under the SCAN definition. Remember to initialize this, server-people.
456 Comstack should now support the WAIS protocol in TCP/IP mode. Note
457 that this does not extend to ODR and ASN.
459 Comstack allows insertion of established socket (primarily for
460 inetd-operation of servers). Doc updated.
462 Front-end server can now start from the inetd in TCP mode. Doc
469 Fixed small problem in SUTRS-filter. A newline was sometimes inserted before
470 the rank and record number.
472 Adjustments to the frontend server.
474 Fixed diagnostic BER dumper. It ignored the file argument.
478 Various changes to retrieval module.
480 Changed the union discriminators of the protocol files from enums to
481 ints paired with #defines.
483 *Changed oident.class to oident.oclass to avoid a reserved word in C++
486 *Changed operator in the RPN structure to 'roperator', again to avoid a
489 Fixed problems in Explain decoders/encoders.
493 Memory bug in log module fixed.
497 Occasional malloc() of 0 bytes fixed in d1_espec.c.
499 Bug in Explain DatabaseInfo module fixed.
501 Some '\r' snuck into one or two of the ret'l config tables. A curse on Windows.
505 The shift to v1.0 signals that we now consider the *core* functionality
506 of YAZ reasonably stable (the core being more or less equivalent to
507 Z39.50-1992). Some of the really nifty v3 stuff is still not heavily
508 tested (Explain not at all - though that will happen soonish).
510 Minor changes to code to support Windows port.
512 Various minor changes after we're getting to use GRS-1 & co. more.
514 Added Espec-1 format.
516 Added VisibleString field body type to GRS-1. It is illegal acc. to my copy
517 of the protocol and it cannot be selected when encoding (maps into 'string'
518 when decoding). Needed to talk to some servers.
520 Demo client can request simple element set names.
522 Added Diagnostic Format encoders/decoders.
524 Added simple Close handling to frontend server (no hooks for resource
525 reporting yet), and demonstration client.
527 Added cs_addrstr() command to COMSTACK to retrieve peer hostname/address.
531 Fixed bug in the frontend-server. The numberOfRecordsReturned field was
532 handled incorrectly when records were requested in the searchResponse. This
533 will only affect you if you use the frontend-server.
535 Added GRS-1 encoders/decoders to the service-level API. Lightly tested.
536 Test-client will ask for and print GRS1. Ztest will return dummy records
539 Added Explain encoders/decoders to the service-level API. Untested.
541 Added Extended Services: Item Order encoders and decoders to the Service-
542 level API. Untested. We could use a recent copy of the pertinent bits
543 of the ILL protocol to add those bits.
545 Added diagnostic format 1 encoders/decoders to the service-level API.
548 Moved pretty-printing of structure-wrappers ({..}) from odr_seq.c to
549 odr_cons.c, which causes a more correct output.
551 Fixed handling of searchRequest in frontend server. NextResultSetPosition
552 was always set to 0 when no records were requested in the searchRequest.
554 * Added better external-handling. This shouldn't harm old code that
555 *encodes* externals. It can break code that looks for a
556 'single-ASN1-type' representation, since those types that are known
557 are now decoded immediately. Look at the SUTRS sample code in
558 seshigh.c and client.c. Documentation updated.
560 Handling of structured records in bend_fetchresponse. Length -1 marks
561 structured record, type is deduced from format field.
564 Fairly quick maintenance release to add SUTRS support.
566 Fixed handling of SUTRS records in the demonstration client.
568 * Added format field to the bend_fetchrequest and bend_fetchresponce
569 structures of the backend API (frontend server). When the record is
570 returned, the value of the format field is mapped to an OID. The
571 value VAL_SUTRS will also cause a slightly different ASN.1 packaging
572 of the record. The special value VAL_NONE in the bend_request means
573 that no specific format was requested by the client. Documentation
574 updated accordingly. Test server (ztest) will return a fixed dummy
575 SUTRS record if your client requests SUTRS.
577 Documentation updated accordingly.
579 You can now set external libraries and RANLIB support in the top-level
583 First public release.