Project

General

Profile

metacat / README @ 7444

1
#
2
#  '$RCSfile$'
3
#   '$Author: leinfelder $'
4
# '$Revision: 7431 $'
5
#     '$Date: 2012-11-23 10:14:59 -0800 (Fri, 23 Nov 2012) $'
6
#
7

    
8
Metacat: XML Metadata and Data Management System
9
------------------------------------------------                      
10

    
11
Version: 2.0.5 Release
12

    
13
Send feedback and bugs to: metacat-dev@ecoinformatics.org
14
                           http://bugzilla.ecoinformatics.org
15

    
16
Contributors: Matt Jones (jones@nceas.ucsb.edu)
17
              Chad Berkley (berkley@nceas.ucsb.edu)
18
              Jing Tao (tao@nceas.ucsb.edu)
19
              Jivka Bojilova (bojilova@nceas.ucsb.edu)
20
              Dan Higgins (higgins@nceas.ucsb.edu)
21
              Saurabh Garg (sgarg@nceas.ucsb.edu)
22
              Duane Costa (dcosta@lternet.edu)
23
              Veronique Connolly (connolly@nceas.ucsb.edu)
24
              John Harris (harris@nceas.ucsb.edu)
25
              Callie Bowdish (bowdish@ecoinformatics.org)
26
              Will Tyburczy (tyburczy@ecoinformatics.org)
27
              Matthew Perry (perry@nceas.ucsb.edu)
28
              Chad Burt (underbluewaters@gmail.com)
29
              Ben Leinfelder (leinfelder@nceas.ucsb.edu)
30
              Chris Barteau (barteau@nceas.ucsb.edu)
31
              Shaun Walbridge (walbridge@nceas.ucsb.edu)
32
              Michael Daigle (daigle@nceas.ucsb.edu) 
33

    
34
Patch contributors:
35
              Andrea Chadden (chadden@nceas.ucsb.edu)
36
              Chris Jones (cjones@msi.ucsb.edu)
37
              Johnoel Ancheta (johnoel@hawaii.edu)
38
              Owen Jones (owen.jones@imperial.ac.uk)
39

    
40
Metacat is a flexible database storage system for XML formatted
41
documents and associated binary files. Metacat models the structure of the
42
XML document, therefore allowing storage of XML documents with arbitrary
43
schemas. Metacat supports several databases on the back-end, including Oracle,
44
PostgreSQL and SQL Server (limited).  The server supports XML document
45
storage, retrieval, query, validation, and transformation (using the XSLT
46
stylesheet language).  In addition, there is a mechanism for replicating the
47
database to other metacat instances for backup and load balancing purposes.
48
Metacat currently uses an LDAP database for authenticating users, but was
49
written to accomodate other authentication services as well.
50

    
51
Installation
52
------------
53
See the file "docs/install.html" for detailed instructions
54
for your OS.
55

    
56
Release Notes for 2.0.5:
57
------------------------
58
This patch release focuses on Metacat support for Oracle
59
*SystemMetadata table names have been shortened to comply with Oracle limits.
60
*SANParks/SAEON spatial zip file download fixed
61
*Pathquery performance fix
62
*Hazelcast 2.x upgrade
63
*Correct handling for deleted and archived objects for both Metacat and DataONE APIs
64

    
65
Release Notes for 2.0.4:
66
------------------------
67
This patch release focuses on Metacat-Metacat replication.
68
*Allows Metacat to stream replication update information between servers to avoid connection timeout issues
69
*Allows Metacat replication when source host does not provide SystemMetadata (DataONE)
70
*Fixes an access control issue that could allow search results to include protected documents
71

    
72
Release Notes for 2.0.3:
73
------------------------
74
This is another critical patch release of Metacat 2.0.
75
*Addresses a bug that prevented Metacat replication from completing (timeout error)
76
*Uses more efficient SystemMetadata synchronization using shared Hazelcast map
77

    
78
Release Notes for 2.0.2:
79
------------------------
80
This is a critical patch release of Metacat 2.0.
81
*Addresses a bug that prevented updates to DataONE identified datapackages (e.g., using DOIs)
82
*Addresses a bug that prevented the use of the Metacat API 'getaccesscontrol' action
83
*Updates the Foresite ORE library to correctly serialize resource map documents
84

    
85
Release Notes for 2.0.1:
86
------------------------
87
This is a minor patch release of Metacat 2.0. Please see the previous release notes for complete information.
88
*Addresses an identifier issue during ORE generation for DataONE services
89
*Increases compatibility with older EML content and the Xalan XSLT processor
90
*Removes XSLT 2.0 support (Saxon)
91

    
92
Release Notes for 2.0.0:
93
------------------------
94
This major release includes support for DataONE.
95
*The DataONE v1.0.0 Member Node service APIs are now the preferred method for communicating with Metacat
96
*The existing EcoGrid and Metacat Servlet APIs are deprecated but still available.
97
*EML-embedded access control rules using permOrder="denyFirst" are no longer supported (https://redmine.dataone.org/issues/2614) 
98
*Replication now utilizes client certificates to establish SSL connections between replication source and target servers
99
*Access control rules now apply to objects on a per-revision basis rather than per-docid
100
*Bugs fixed include:
101
-SANParks skin/TPC (5561, 5530, 5533, 5542, 5543, 5544, 5551, 5563, 5566, 5567, 5569, 5353)
102
-Registry (5114, 5244)
103
-Replication (4907, 5537, 5536, 5534, 5520, 5519, 3296)
104
-Spatial cache regeneration can be skipped during reconfiguration/redeployment/upgrade (3811)
105
-Pathquery support for temporal search criteria (2084)
106
-Character encoding of XML now respected (internationalization) (2495, 4083, 3815)
107

    
108

    
109
Release Notes for 1.9.5:
110
------------------------
111
This release fixes those bugs:
112
*Metacat could not download the included schemas in an external schema file during inserting.
113
*Workflow scheduler could not work since the metadata standard of kepler kar file was changed. 
114
*Earthgrid could not transform the Earthgrid query with concept "/" to the Metacat path query correctly.
115
*Document access rules are now preserved when documents are archived during the 'delete' action.
116

    
117
Release Notes for 1.9.4:
118
------------------------
119
This release fixes bugs in the FGDC data package upload and download interface utilized
120
by the SANParks and SAEON skins.
121

    
122
Release Notes for 1.9.3:
123
------------------------
124
This release fixes a harvester bug that prevented the EML harvester from processing
125
harvest lists.
126
The Kepler skin has been updated to support KarXML 2.1.
127
Ecogrid query services now support multiple namespace searches.
128

    
129
Release Notes for 1.9.2:
130
------------------------
131
This release primarily holds the addition of the Threshold of Potential
132
Concern workflow functionality (TPC).  The following issues were addressed:
133

    
134
* Create a properties file for use by JUnit Tests (Bug 2994)
135
* security issue with skins (Bug 3368)
136
* reorganize classes into a more functional specific structure (Bug 3510)
137
* Add admin names as dropdown in configuration login (Bug 3729)
138
* KNB metacat replication error log file is empty (Bug 3885)
139
* Create TPC Report web browse/search pages (Bug 4165)
140
* Create archive extraction functionality (Bug 4166)
141
* Create Workflow Scheduler (Bug 4167)
142
* metacat didn't update xml_path_index table while a document was updated (Bug 4367)
143
* Enforce permissions for tpc workflow viewing and scheduling (Bug 4420)
144
* Fix cross platform TPC GUI issues (Bug 4556)
145
* TPC Sanparks page content lenth issue (Bug 4557)
146
* Create validate and isAuthorized unit tests (Bug 4558)
147
* Cannot insert replication server via gui (Bug 4594)
148
* Timed Replication takes many hours and drives the load up on KNB (Bug 4616)
149
* [ESA] Update fails when document rev number is missing (Bug 4627)
150
* fails to catch some insert and update failures (Bug 4637)
151
* must support java 1.6 (Bug 4641)
152
* Convert build to pull eml from svn instead of cvs (Bug 4644)
153
* handleGetRevisionAndDocTypeAction should search both xml_documents and xml_revisions table (Bug 4645)
154
* Metacat couldn't update a document from client, which previous versions only stay in xml_revisions table (Bug 4649)
155
* metacat runs out of memory (Bug 4658)
156
* ESA skin links are hard coded to data.esa.org (Bug 4698)
157
* Update release 1.9.2 release notes (Bug 4707)
158
* Handle writing a text node > 4000 characters to the db. (Bug 4708)
159
* Metacat should run against Tomcat 6 (Bug 4716)
160

    
161
Release Notes for 1.9.1:
162
------------------------
163
The 1.9.1 release holds the bug fixes found after releasing 1.9.0 beta.  
164
These bugs were primarily replication issues.  There is no difference 
165
in functionality between 1.9.0 and 1.9.1 
166

    
167
Release Notes for 1.9.0:
168
------------------------
169
This release focuses on simplifying the Metacat installation process by 
170
creating a binary (war) installation.  The need to build the application
171
on the server has been removed (although the option is still available).
172
In order to facilitate this method of installation, a few major modifications
173
were made to the code:
174

    
175
  -- Ant token replacement was removed for all non-build variables in the 
176
     application (most of this was already done in 1.8.1).
177

    
178
  -- The Metacat properties confguration was moved into the application
179
     itself.
180

    
181
  -- Database schema version detection and install/upgrade utilities were 
182
     added to the application.
183

    
184
Also, this release includes several enhancements:
185
  -- it supports the new EML 2.1.0 version.  
186

    
187
  -- Documents are now stored on the local filesystem as well as in the 
188
     database in order to preserve document integrity.
189
     
190
  -- Metacat verifies new schemas when they are added.
191

    
192
  -- Additional access is propegated with documents during replication.
193

    
194
High priority bugs were addressed in this release as well.
195

    
196
The enhancements/bugs addressed are:
197

    
198
* escaped "less than" in inlinedata causes invalid eml output (Bug 2564)
199
* need to set filename for download files (Bug 2566)
200
* add ability for search engines to index metacat documents (Bug 2826)
201
* EML citation section should include both organizationNames and individualNames (Bug 3059)
202
* refactor skins to get organization list from metacat getOrganizations() function (Bug 3114)
203
* Update dataknp.sanparks.org packageId attributes to match Metacat Ids (Bug 3258)
204
* New documents explicitly set as public access don't show up correctly (Bug 3262)
205
* Modify confguration utility in metacat (Bug 3371)
206
* Integrate perl token replacement changes (Bug 3372)
207
* Create skin specific configuration utility (Bug 3373)
208
* Add authentication for configuration utility (Bug 3374)
209
* Create a sorted properties utility (Bug 3375)
210
* Add DB upgrade/install functionality to java code (Bug 3376)
211
* Create ANT install target for developers (Bug 3377)
212
* Create LSID server installation (Bug 3380)
213
* Create unit test code for 1.9 additions (Bug 3381)
214
* create simple turnkey installer for metacat Phase I (Bug 3461)
215
* Maps do not display in Firefox version 3 (Bug 3462)
216
* Replicate access rules in replication (Bug 3464)
217
* Metacat casesensitive="true" option in pathquery expressions is broken (Bug 3472)
218
* Add full schema checking when metacat register new schema (Bug 3474)
219
* Incorporate EML 2.1.0 access changes in metacat (Bug 3495)
220
* getprincipals action returns invalid XML document (Bug 3527)
221
* Update knbweb to serve new metacat install (Bug 3545)
222
* Replication should write to disk (Bug 3554)
223
* Update acknowlegements in metacat readme (Bug 3588)
224
* Validate the ldap administrator field. (Bug 3616)
225
* Allow for different authentication services in metacat configuration (Bug 3680)
226
* Tag utilities module and have metacat check out that tag (Bug 3685)
227

    
228
Release Notes for 1.8.1:
229
------------------------
230
This release focuses on bug fixes. In this release, the problem that Metacat 1.8.0 and previous 
231
versions use illegitimate EML 2.0.1 schemas is addressed: first, Metacat 1.8.1 comes with
232
legitimate EML 2.0.1 schemas; second, existing invalid EML 2.0.1 documents will be 
233
automatically fixed while maintaining their package ID during the Metacat 1.8.1 upgrading process. 
234
Details please see:
235
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=3239
236
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=3241
237

    
238
Note: after upgrading the Metacat to version 1.8.1, some replication issues may be seen, e.g., the 
239
EML 2.0.1 documents from Metacat 1.8.0 or ealier verions may be rejected since Metacat 1.8.1 uses
240
different EML 2.0.1 schemas (see bug 3239). If this is case, Metacat administrators should notify
241
their counterparts to upgrade previous version Metacats to 1.8.1. 
242

    
243
The fixed bugs include:
244

    
245
*Character set (charset) problem when filling out form (Bug2797)
246
*Charset bug: > "less than" symbol does not display correctly (Bug2517)
247
*Metacat performance issue in Sanparks skin (Bug 3174)
248
*Metacat using illegitimate versions of EML schema (Bug 3239)
249
*Update older invalidated eml201 document in Metacat (Bug 3241)
250
*Verify existing token changes to skins (Bug 3176)
251
*The edit feature in the NCEAS Data Repoistory does not work (Bug 2644)
252
*Expose permission options for registry uploads (Bug 3014)
253
*ESA registry doesn't have LTER in login dropdown menu (Bug 2647)
254
*Data Catalog Map is slow when selecting (Bug2732)
255
*Only one attribute per element returned with pathquery results(Bug 2999)
256
*The field "skinconfigs" in the MetacatUtil class is public (Bug 3057)
257
*Generalize the reading of skin.configs in DBTransform (Bug3058)
258
*The query example in metacatquery.html document need to be changed (Bug3137)
259
*Add upload method into Metacat tour (Bug 3139)
260
*Query resultset doesn't show component name in kepler skin (Bug 3178)
261
*Add fields used in Morpho search to the default indexPaths property (Bug 3259)
262
*Private data cannot be downloaded from metadata display page (xsl) (Bug 3263)
263
*An error message happen during the metacat start up (Bug 3279)
264
*Replication: Timed replication failures occur twice instead of once (Bug 3304)
265
*Inline Data does not work correctly without the <pre> tag (Bug 3088)
266
*Include FGDC metadata in KNB and NCEAS skin search results (Bug 3146)
267

    
268
Release Notes for 1.8.0:
269
------------------------
270
This release focuses on improving query performance.  Both the selection 
271
and access control queries were rewritten to execute efficiently.
272
To improve search performance, a query caching mechanism was introduced. 
273
Cached queries are currently supported only for public users.
274

    
275
New Features:
276
* Data registries now support uploading of data objects along with data 
277
  packages (Bug 1982)
278
  
279
Bug Fixes:
280
* Metacat Performace: Rewrite the xml_nodes queries (Bug 2155)
281
* Metacat Performace: Rewrite the xml_access part of the query (Bug 2557)
282
* Query cache mechanism (Bug 2905)
283
* Metacat Performance: updates from Morpho of data packages are taking 
284
   longer than five minutes (Bug 2805)
285
* Metacat Performance: Optimize Postgres and Tomcat (Bug 2157)
286
* Metacat Performace: Upgrading hardware setup (Bug 2175)
287
* Metacat Performace: Add/drop indices on key columns (Bug 2153)
288
* Display of metadata documents reorganized, including a new citation format,
289
  obvious download options, and a redesigned data table layout (Bugs 2981, 2832)
290
* I.E. display fixes on default skin (Bug 2579)
291
* Web Address links fixed (Bug 2147)
292
* NCEAS skin redesigned to use IFRAME-less layout, match new website.
293
* Spatial query:  data packages must be fully contained by the selection 
294
  bounding box in order to appear in the search results (Bugs 2972, 2732).
295
* FGDC support: upload, delete, update, access control, and download
296
  (Bugs 2807, 2925, 2926, 2929, 2030).
297
Compatibility Notices:
298
* Tomcat 3 and 4 are no longer tested or supported. Users are 
299
  highly encouraged to upgrade to Tomcat 5.5
300

    
301
Release Notes for 1.7.0:
302
------------------------
303
This release features only a few minor changes to the core Metacat engine. 
304
The major focus of this release is the addition of the spatial functionality.
305
The geographic coverage of metadata documents can now be cached in a GIS-
306
accessible format and published via web mapping services and an online
307
interactive map. 
308

    
309
New Features:
310
* Three new open source libraries have been integrated with Metacat:
311
  - Geoserver:  A standards-compliant web map server to publish
312
                geographic data to the web.
313
               (http://docs.codehaus.org/display/GEOS/Home)
314
  - GeoTools:   A java-based GIS toolkit to programatically
315
                manipulate spatial datasets.
316
                (http://geotools.codehaus.org/)
317
  - Mapbuilder: A javascript application to provide an interactive
318
                web map front-end to Geoserver.
319
                (http://docs.codehaus.org/display/MAP/Home)
320
* Spatial Caching/Indexing mechanism; documents with geographic
321
  coverages will be added to the spatial cache.
322
* Spatial Query action in metacat servlet. 
323
* Interactive Web map to visualize and query the spatial 
324
  distribution of metadata documents.
325
* Experimental python, ruby and php client libraries to interface with metacat.
326
* Preliminary process in place for web based configuration of metacat.
327

    
328
Compatibility Notices:
329
* Tomcat 3 and 4 are no longer tested or supported. Users are 
330
  highly encouraged to upgrade to Tomcat 5.5
331

    
332
Bug Fixes:
333
* Metacat administrators are able to modify and delete documents 
334
  created by other users.
335
* Fixed problems with indexing XML attributes, see bug 2469
336

    
337

    
338
Release Notes for 1.6.0:
339
------------------------
340

    
341
This release comes with more performance improvements, initial support for 
342
LSIDs (Life Sciences Identifiers) and FGDC standard, more controls for 
343
Metacat administrators and bug fixes. Below is the list of bug fixes and
344
performance improvements.
345

    
346
Bug Fixes: 
347
* Improved the indexing algorithm. Earlier indexing failed for some documents 
348
  randomly and used to take a lot of time to complete for others. The 
349
  code for indexing was changed to take care of both these problems.
350
* Earlier, xmlns prefix was used to determine the namespace of the document. 
351
  Now schemaLocation is used instead xmlns prefix to determine the namespace 
352
  of the document as that is a better indicator of document type. 
353
* INSTR was used in some SQL statements and it is not supported by Postgres. 
354
  So SQL statements were modified so that INSTR is not used.
355
* Replication was changed to include replication of deleted documents also.
356
* Fixed bug in squery which didnt allow use of not-contains 
357

    
358
New Features:
359
* Added FGDC schema and XSLT so that Metacat can handle FGDC standard
360
* Added support for LSID. This includes modifying the stylesheets to 
361
  display the LSIDs, modifying the build to include a new target 
362
  'install-ldap'.
363
* Added following access control levels to Metacat:
364
    1. Administrators - users who can do the following:
365
       a. Run replication
366
       b. Delete any document
367
       c. Modify any document
368
       d. run indexing for any document
369
       e. check the logs
370
    2. allowedUsers - User who are allowed to submit
371
    3. deniedUsers - Users not allowed to submit
372
* Added a new skin for Ecological Society of America. 
373
* Created an Advanced search servlet which can be used from the web. 
374
* Various connections have been modified to be secure. e.g. connection between 
375
ldaps is made secure now, replication is done over secure channels.  
376

    
377
Performance:
378
* Reduced size of xml_nodes by creating a new table for holding nodes from 
379
  deleted documents and old revisions of the documents. 
380
* Provided a new variable in metacat.properties where more frequently searched 
381
  for paths can be specified. Seperate indexes are created for these paths 
382
  - so that search is faster.
383
* Included log4j for logging and debuging to prevent wasting of time in printing log statements. 
384

    
385
Release Notes for 1.5.0:
386
------------------------
387

    
388
This release comes with performace improvement, user interface enhancements,
389
and bug fixes. Below is the list of bug fixes and performance improvements. 
390

    
391
Bug Fixes:
392
* Modify property values of harvester registration servlets to match the
393
  servlet-mapping URL values in web.xml. The old values used the servlet
394
  class names. This worked in Tomcat 4 but seems to break in Tomcat 5 on
395
  Windows. The new values use the servlet-mapping URL values. This should
396
  work in both Tomcat 4 and Tomcat 5. (Bug 162)
397
* Re-implement logic to prune old log entries from the HARVEST_LOG and
398
  HARVEST_DETAIL_LOG tables. The old logic caused integrity constraint
399
  violations in the database because it tried to delete parent records from
400
  HARVEST_LOG prior to deleting child records from
401
  HARVEST_DETAIL_LOG. (Bug 162)
402
* In data registry, minor bugs fixed like the error page shows the link back
403
  to the form when error page was generated because of a document read
404
  request from search results page,  the successful delete button leading
405
  to a blank screen and the old ACL overwritten by the registry.
406
  (Bugs 1307, 1310, 1322, 1344, 1551)
407
* Changed the code to support insertion of following characters: ', `,
408
  charcters in the Numeric Character Reference format (&#xyz;) and
409
  characters like µ. Characters like µ will be converted to and stored in
410
  Numeric Character Reference format(&#xyz;). They will also be returned
411
  in Numeric Character Reference and it is upto the client to convert them
412
  and display them accordingly in the application. Partial fix provided by
413
  Johnoel Ancheta. (Bug 1538,1711)
414
* Spatial search failed on Oracle because of invalid entries made by
415
  some documents in the nodedata column of xml_nodes for paths involving
416
  'eastBoundingCoordinate', 'westBoundingCoordinate',
417
  'northBoundingCoordinate', 'southBoundingCoordinate'. A new column
418
  nodedatanumerical was added to xml_nodes table such that all the numerical
419
  nodedata is stored in this column and this column is now used for spatial
420
  search. (Bug 1703, 1718)
421
* In the default skin, clicking on the keywords on the home page did not
422
  result is a search being done. Fix provided by Owen Jones. (Bug 1768)
423
* Metacat generated a success message even when a document which didnt
424
  exsist was requested for deletion. This has been fixed. (Bug 1850)
425
* "packagetype" in xml-relation table was entered as eml200 namespace when
426
  an eml201 document was inserted. This is fixed now so that "packagetype"
427
  in xml-relation table points to eml201 namespace. (Bug 1979)
428
* System_id in xml_catalog pointed to http://knb.ecoinformatics.org/knb/
429
  earlier. Fixed such that it points to the locally installed metacat url. 
430
  (Bug 1986)
431
* Changes to the Query subsystem fix bugs that prevented attributes from 
432
  being expressed solely in the xpath query statement and the returnfield 
433
  values. For instance, a query URL may now include search strings like 
434
  '@packageId=sbclter%25' and return strings like 'returnfield=@packageId'.
435
  Previously, the attribute had to be appended to an element: 
436
  '/eml/@packageId=sbclter%25'. These fixes change DBQuery.java, 
437
  QuerySpecification.java, and QueryTerm.java (Bug 2052)
438
* Search query failed in case of Oracle if number of documents in the result
439
  were more than 1000. This has been fixed. (Bug 2000)
440
* Removed any occurence of enum which is now a keyword in Java 1.5
441

    
442

    
443
Enhancements:
444
* Major improvements done in user interface for the data registeries and
445
  various other skins. Improvements done based on suggestions from Mark
446
  Stromberg, Laura Downey and others. Improvements also done in resultset.xsl,
447
  the default skin and ldap templates. (Bug 1948)
448
* Coded added such that administrator can delete documents irrespective of
449
  who the document belongs to.
450
* Performance impovement done in searching of datasets. A part of the search
451
  time was taken up because of generation of resultset after the search had be
452
  done. So this was the sequence of events in earlier metacat
453
  1) Search for the given text
454
  2) A list of docids generated
455
  3) For each of the docids
456
     3a) Use xml_index and xml_nodes table to generate the string descibing
457
         the document including the returnfields requested in the search
458
  4) Add all the strings from step 3a to send back the resultant
459
     document. Here a decent amount of time was being taken by step 3a. 
460
  The algorithm is now modified by addition of two tables xml_queryresult and
461
  xml_returnfields and a user defined parameter xml_returnfield_count. The
462
  new algorithm works as follows:
463
  1) Search for the given text
464
  2) A list of docids is generated
465
  3) For the given set of return fields generate a unique string and check
466
     if that string exists in xml_returnfields
467
     3a) If string does not exist in xml_returnfield, then enter a new
468
         record usage_count as 1 and returnfield_string as the unique string
469
         generated above.
470
     3b) Else if the string exists, increment usage_count
471
  4) Given the docids from step 2 and the id of the returnfield record from
472
     step 3, query for any docids that already exist in xml_queryresult.
473
     For the docids that do exist, get the queryresult_string.
474
  5) For rest of the docids from step2 which were not found in step 4, do
475
     the following for each of the documents:
476
     5a) Use xml_index and xml_nodes table to generate the string descibing
477
         the document including the returnfields requested in the search
478
     5b) If usage_count of the record from step is more than
479
         xml_returnfield_count set in metacat.properties, then store the
480
         string in xml_queryresult as a record which has the returnfield_id
481
         representing the set of returnfields, docid representing the
482
         document and the string as queryresult_string.
483
  6) Add all the strings from step 4 and step 5a to send back the resultant
484
     document
485
  So the results from step 3a in previous algorithm are effectively cached
486
  and hence same computation is not done again and again for each search.
487
  When a document is deleted, all the entries for that document in
488
  xml_queryresult table are also deleted. When a document is updated, all
489
  the entries for that document in xml_queryresult table are deleted. This
490
  works fine because those entries will be generated and cached again the
491
  next time the document is part of a search is requested.
492
* Performance impovement done for % search.
493
* Following new functions added to metacat client API: a method to set access
494
  on an xml document and a method to get newest version for a given document.
495
* Implement a new HarvesterServlet for running Harvester as a servlet. This
496
  eliminates the need to run Harvester in a terminal window. By default, the
497
  HarvesterServlet is commented out in lib/web.xml.tomcat(3,4,5). The user
498
  documentation will be modified to instruct Harvester administrators to
499
  uncomment the HarvesterServlet entry.
500
* Minor enhancement to support multiple email addresses for harvester
501
  administrator and site contact. Each address is separated by a comma or
502
  semicolon.
503
* Increase number of rows in Harvest List Editor from 300 to 1200.
504
* Changed default maxHarvests value to 0. Added logic to ignore maxHarvests
505
  value when it is set to 0 or a negative number. This allows Harvester to
506
  run indefinitely without shutting down after reaching a maximum number of
507
  harvests. The previous default value of 30 would cause Harvester to
508
  terminate after 30 harvests.
509

    
510
Details of all changes can be found in the bug database here:
511
http://bugzilla.ecoinformatics.org/buglist.cgi?product=Metacat&target_milestone=1.5
512

    
513

    
514
Release Notes for 1.4.0:
515
------------------------
516

    
517
This is a major release, and is the first to introduce many new features to
518
Metacat.  Some of the major new features in this version of Metacat include:
519

    
520
* Added a new 'Harvester' that allows documents to be periodically pulled
521
  from distributed sources into metacat, useful for interfacing with other
522
  system types. See the Metacat Tour for details.
523
* Added new 'skins' capability to allow the GUI for the metacat web interface
524
  to be more easily customized to fit into site needs.  The skin is based on
525
  a flexible mix of XSLT, CSS, and Javascript.
526
* Added a web-based metadata entry form for submitting limited EML documents
527
  as part of a data registry.  The GUI for the registry is customizable and 
528
  is integrated with the 'skins' system for the main metacat interface.  The
529
  registry subsystem is written in Perl, and can simultaneously be used to 
530
  present multiple 'registry' interfaces.
531
* A new 'client API' has been developed and implemented in Java and in Perl 
532
  so that metacat functions can be accessed from any program in those
533
  languages.  The client API supports the major metacat servlet actions,
534
  including login(), logout(), query(), insert(), update(), delete(), and 
535
  upload(). See the Metacat Tour for details.
536
* Added a new 'getlog' action that produces a usage history for all major
537
  events.  So now an XML report can be generated for document reads, inserts,
538
  deletes, etc.  See the new section in the Metacat Tour.
539
* Added a new 'buildindex' action that can rebuild the index entries for any
540
  document in the database.
541
* The configuration file for metacat (metacat.properties) has been moved out
542
  of the jar file and into the WEB-INF directory, allowing far easier changes
543
  to the configuration parameters.
544
* Results in default web interface are sorted by title in the XSLT 
545
  (configurable)
546
* Many bugs were fixed.
547

    
548
Details of all changes can be found in the bug database here:
549
http://bugzilla.ecoinformatics.org/buglist.cgi?product=Metacat&target_milestone=1.4
550

    
551
Release Notes for 1.3.1:
552
------------------------
553

    
554
This is a simple interim bug fix. No major functionality changes. Bugs fixed 
555
include:
556
 1) Metacat 1.3.0 doesn't work in Java 1.3 because a subtle API differnce in 
557
    Java 1.3 and Java 1.4. Currently, Metacat 1.3.1 will work in both Java 1.3 
558
    and Java 1.4.
559
 2) Distribution package size was reduced.
560

    
561

    
562
Release Notes for 1.3.0
563
------------------------
564

    
565
In 1.3.0 release, the structure of the xml_access table was changed and a new
566
table, xml_accesssubtree was added. If you try to update a previously 
567
installed Metacat, you should run a script file to updated the table structure 
568
before installation.
569
For Oracle user: At the SQLPLUS prompt type the following -
570
@src/reviseformetacat13.sql
571
For Postgresql user: At install directory prompt type the following -
572
psql exp < src/reviseformetacat13_postgres.sql
573
(where 'exp' is the database name).
574

    
575
After installation, user should run "ant schemasql" command to register EML2
576
schema in xml_catalog table.
577

    
578
If you are a new Metacat user, this step is unneeded.
579

    
580
Note: 1) We recommend to use Tomcat 4 and JAVA 1.4 to run Metacat. Otherwise, 
581
         it will cause potential replication issues.
582
      2) Delete the xercesImpl.jar and xmlParserAPIs.jar files 
583
         which are in $CATALINA_HOME/common/endorsed. They are old version and
584
         don't support XML schema validation.
585

    
586
New Features in 1.3.0
587
  1) Partialy support EML2 document. User can store, query, read and write
588
     EML2 documents. However, Metacat only support access control in resource
589
     level. The subtree level access control will be ignored.
590
  2) Support other xml document base on namespace/schema.
591
  3) Support query for attribute value
592
  4) Assign MIME type to data file base on metadata when user try to read it.
593
  5) Owner can assign access rules to a document which does not have access 
594
     document to apply it.
595
  6) Support exporting single file, not only whole package
596
  7) Resupport Microsoft SQL Server.
597

    
598
Fixes in 1.3.0:
599
  1) Couldn't finish delta T replication for large set of documents.
600
  2) Couldn't create access control during delta T replication.
601
  3) Eorr will be written to a seperated log file if some documents
602
     were failed in replication.
603
  4) Decrease the time to create access rules during insert or update 
604
     a package.
605
     
606
Documentation
607
-------------
608
See the docs directory for detailed documentation and installation
609
instructions.
610

    
611
Details of the Metacat architecture can be found on the website for
612
the Knowledge Network for Biocomplexity (KNB):
613

    
614
  http://knb.ecoinformatics.org/software/metacat/
615

    
616
Contributions to this work are welcome.  Please see the above web site
617
for details on how to contribute.
618

    
619
Major Known Bugs or Feature Requests (see http://bugzilla.ecoinformatics.org)
620
-----------------------------------------------------------------------------
621
If you discover a bug please report it, either by email (above) or by using
622
our bug tracking system (http://bugzilla.ecoinformatics.org). There is a
623
list of currently unimplemented features in Bugzilla that we are working on
624
for the next release.
625

    
626
Legalese
627
--------
628
This software is copyrighted by The Regents of the University of California
629
and the National Center for Ecological Analysis and Synthesis
630
and licensed under the GNU GPL; see the 'LICENSE' file for
631
details.
632

    
633
This material is based upon work supported by the
634
National Science Foundation under Grant No. DEB99-80154, DBI99-04777, and
635
0225676 for SEEK.  Any opinions, findings and conclusions or recomendations 
636
expressed in this material are those of the author(s) and do not necessarily 
637
reflect the views of the National Science Foundation (NSF).
638

    
639
This software is partially supported by a grant from the Andrew W. 
640
Mellon Foundation.
641

    
642
This product includes software developed by the Apache Software
643
Foundation (http://www.apache.org/). See the LICENSE file in lib/apache
644
for details.
645

    
646
The source code, object code, and documentation in the com.oreilly.servlet
647
package is copyright and owned by Jason Hunter. See the cos-license.html file
648
for details of the license.  Licensor retains title to and ownership of the
649
Software and all enhancements, modifications, and updates to the Software.
650

    
651
This software includes the JDBC driver for PostgreSQL.  See the 
652
postgresql-license.txt file for details.