Project

General

Profile

1
#
2
#  '$RCSfile$'
3
#   '$Author: daigle $'
4
# '$Revision: 4639 $'
5
#     '$Date: 2008-12-01 15:57:11 -0800 (Mon, 01 Dec 2008) $'
6
#
7

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

    
11
Version: 1.9.0 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/user/metacat-install.html" for detailed instructions.
54

    
55
Release Notes for 1.9.0:
56
------------------------
57
This release focuses on simplifying the Metacat installation process by 
58
creating a binary (war) installation.  The need to build the application
59
on the server has been removed (although the option is still available).
60
In order to facilitate this method of installation, a few major modifications
61
were made to the code:
62

    
63
  -- Ant token replacement was removed for all non-build variables in the 
64
     application (most of this was already done in 1.8.1).
65

    
66
  -- The Metacat properties confguration was moved into the application
67
     itself.
68

    
69
  -- Database schema version detection and install/upgrade utilities were 
70
     added to the application.
71

    
72
Also, this release includes several enhancements:
73
  -- it supports the new EML 2.1.0 version.  
74

    
75
  -- Documents are now stored on the local filesystem as well as in the 
76
     database in order to preserve document integrity.
77
     
78
  -- Metacat verifies new schemas when they are added.
79

    
80
  -- Additional access is propegated with documents during replication.
81

    
82
High priority bugs were addressed in this release as well.
83

    
84
The enhancements/bugs addressed are:
85

    
86
* escaped "less than" in inlinedata causes invalid eml output (Bug 2564)
87
* need to set filename for download files (Bug 2566)
88
* add ability for search engines to index metacat documents (Bug 2826)
89
* EML citation section should include both organizationNames and individualNames (Bug 3059)
90
* refactor skins to get organization list from metacat getOrganizations() function (Bug 3114)
91
* Update dataknp.sanparks.org packageId attributes to match Metacat Ids (Bug 3258)
92
* New documents explicitly set as public access don't show up correctly (Bug 3262)
93
* Modify confguration utility in metacat (Bug 3371)
94
* Integrate perl token replacement changes (Bug 3372)
95
* Create skin specific configuration utility (Bug 3373)
96
* Add authentication for configuration utility (Bug 3374)
97
* Create a sorted properties utility (Bug 3375)
98
* Add DB upgrade/install functionality to java code (Bug 3376)
99
* Create ANT install target for developers (Bug 3377)
100
* Create LSID server installation (Bug 3380)
101
* Create unit test code for 1.9 additions (Bug 3381)
102
* create simple turnkey installer for metacat Phase I (Bug 3461)
103
* Maps do not display in Firefox version 3 (Bug 3462)
104
* Replicate access rules in replication (Bug 3464)
105
* Metacat casesensitive="true" option in pathquery expressions is broken (Bug 3472)
106
* Add full schema checking when metacat register new schema (Bug 3474)
107
* Incorporate EML 2.1.0 access changes in metacat (Bug 3495)
108
* getprincipals action returns invalid XML document (Bug 3527)
109
* Update knbweb to serve new metacat install (Bug 3545)
110
* Replication should write to disk (Bug 3554)
111
* Update acknowlegements in metacat readme (Bug 3588)
112
* Validate the ldap administrator field. (Bug 3616)
113
* Allow for different authentication services in metacat configuration (Bug 3680)
114
* Tag utilities module and have metacat check out that tag (Bug 3685)
115

    
116
Release Notes for 1.8.1:
117
------------------------
118
This release focuses on bug fixes. In this release, the problem that Metacat 1.8.0 and previous 
119
versions use illegitimate EML 2.0.1 schemas is addressed: first, Metacat 1.8.1 comes with
120
legitimate EML 2.0.1 schemas; second, existing invalid EML 2.0.1 documents will be 
121
automatically fixed while maintaining their package ID during the Metacat 1.8.1 upgrading process. 
122
Details please see:
123
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=3239
124
http://bugzilla.ecoinformatics.org/show_bug.cgi?id=3241
125

    
126
Note: after upgrading the Metacat to version 1.8.1, some replication issues may be seen, e.g., the 
127
EML 2.0.1 documents from Metacat 1.8.0 or ealier verions may be rejected since Metacat 1.8.1 uses
128
different EML 2.0.1 schemas (see bug 3239). If this is case, Metacat administrators should notify
129
their counterparts to upgrade previous version Metacats to 1.8.1. 
130

    
131
The fixed bugs include:
132

    
133
*Character set (charset) problem when filling out form (Bug2797)
134
*Charset bug: > "less than" symbol does not display correctly (Bug2517)
135
*Metacat performance issue in Sanparks skin (Bug 3174)
136
*Metacat using illegitimate versions of EML schema (Bug 3239)
137
*Update older invalidated eml201 document in Metacat (Bug 3241)
138
*Verify existing token changes to skins (Bug 3176)
139
*The edit feature in the NCEAS Data Repoistory does not work (Bug 2644)
140
*Expose permission options for registry uploads (Bug 3014)
141
*ESA registry doesn't have LTER in login dropdown menu (Bug 2647)
142
*Data Catalog Map is slow when selecting (Bug2732)
143
*Only one attribute per element returned with pathquery results(Bug 2999)
144
*The field "skinconfigs" in the MetacatUtil class is public (Bug 3057)
145
*Generalize the reading of skin.configs in DBTransform (Bug3058)
146
*The query example in metacatquery.html document need to be changed (Bug3137)
147
*Add upload method into Metacat tour (Bug 3139)
148
*Query resultset doesn't show component name in kepler skin (Bug 3178)
149
*Add fields used in Morpho search to the default indexPaths property (Bug 3259)
150
*Private data cannot be downloaded from metadata display page (xsl) (Bug 3263)
151
*An error message happen during the metacat start up (Bug 3279)
152
*Replication: Timed replication failures occur twice instead of once (Bug 3304)
153
*Inline Data does not work correctly without the <pre> tag (Bug 3088)
154
*Include FGDC metadata in KNB and NCEAS skin search results (Bug 3146)
155

    
156
Release Notes for 1.8.0:
157
------------------------
158
This release focuses on improving query performance.  Both the selection 
159
and access control queries were rewritten to execute efficiently.
160
To improve search performance, a query caching mechanism was introduced. 
161
Cached queries are currently supported only for public users.
162

    
163
New Features:
164
* Data registries now support uploading of data objects along with data 
165
  packages (Bug 1982)
166
  
167
Bug Fixes:
168
* Metacat Performace: Rewrite the xml_nodes queries (Bug 2155)
169
* Metacat Performace: Rewrite the xml_access part of the query (Bug 2557)
170
* Query cache mechanism (Bug 2905)
171
* Metacat Performance: updates from Morpho of data packages are taking 
172
   longer than five minutes (Bug 2805)
173
* Metacat Performance: Optimize Postgres and Tomcat (Bug 2157)
174
* Metacat Performace: Upgrading hardware setup (Bug 2175)
175
* Metacat Performace: Add/drop indices on key columns (Bug 2153)
176
* Display of metadata documents reorganized, including a new citation format,
177
  obvious download options, and a redesigned data table layout (Bugs 2981, 2832)
178
* I.E. display fixes on default skin (Bug 2579)
179
* Web Address links fixed (Bug 2147)
180
* NCEAS skin redesigned to use IFRAME-less layout, match new website.
181
* Spatial query:  data packages must be fully contained by the selection 
182
  bounding box in order to appear in the search results (Bugs 2972, 2732).
183
* FGDC support: upload, delete, update, access control, and download
184
  (Bugs 2807, 2925, 2926, 2929, 2030).
185
Compatibility Notices:
186
* Tomcat 3 and 4 are no longer tested or supported. Users are 
187
  highly encouraged to upgrade to Tomcat 5.5
188

    
189
Release Notes for 1.7.0:
190
------------------------
191
This release features only a few minor changes to the core Metacat engine. 
192
The major focus of this release is the addition of the spatial functionality.
193
The geographic coverage of metadata documents can now be cached in a GIS-
194
accessible format and published via web mapping services and an online
195
interactive map. 
196

    
197
New Features:
198
* Three new open source libraries have been integrated with Metacat:
199
  - Geoserver:  A standards-compliant web map server to publish
200
                geographic data to the web.
201
               (http://docs.codehaus.org/display/GEOS/Home)
202
  - GeoTools:   A java-based GIS toolkit to programatically
203
                manipulate spatial datasets.
204
                (http://geotools.codehaus.org/)
205
  - Mapbuilder: A javascript application to provide an interactive
206
                web map front-end to Geoserver.
207
                (http://docs.codehaus.org/display/MAP/Home)
208
* Spatial Caching/Indexing mechanism; documents with geographic
209
  coverages will be added to the spatial cache.
210
* Spatial Query action in metacat servlet. 
211
* Interactive Web map to visualize and query the spatial 
212
  distribution of metadata documents.
213
* Experimental python, ruby and php client libraries to interface with metacat.
214
* Preliminary process in place for web based configuration of metacat.
215

    
216
Compatibility Notices:
217
* Tomcat 3 and 4 are no longer tested or supported. Users are 
218
  highly encouraged to upgrade to Tomcat 5.5
219

    
220
Bug Fixes:
221
* Metacat administrators are able to modify and delete documents 
222
  created by other users.
223
* Fixed problems with indexing XML attributes, see bug 2469
224

    
225

    
226
Release Notes for 1.6.0:
227
------------------------
228

    
229
This release comes with more performance improvements, initial support for 
230
LSIDs (Life Sciences Identifiers) and FGDC standard, more controls for 
231
Metacat administrators and bug fixes. Below is the list of bug fixes and
232
performance improvements.
233

    
234
Bug Fixes: 
235
* Improved the indexing algorithm. Earlier indexing failed for some documents 
236
  randomly and used to take a lot of time to complete for others. The 
237
  code for indexing was changed to take care of both these problems.
238
* Earlier, xmlns prefix was used to determine the namespace of the document. 
239
  Now schemaLocation is used instead xmlns prefix to determine the namespace 
240
  of the document as that is a better indicator of document type. 
241
* INSTR was used in some SQL statements and it is not supported by Postgres. 
242
  So SQL statements were modified so that INSTR is not used.
243
* Replication was changed to include replication of deleted documents also.
244
* Fixed bug in squery which didnt allow use of not-contains 
245

    
246
New Features:
247
* Added FGDC schema and XSLT so that Metacat can handle FGDC standard
248
* Added support for LSID. This includes modifying the stylesheets to 
249
  display the LSIDs, modifying the build to include a new target 
250
  'install-ldap'.
251
* Added following access control levels to Metacat:
252
    1. Administrators - users who can do the following:
253
       a. Run replication
254
       b. Delete any document
255
       c. Modify any document
256
       d. run indexing for any document
257
       e. check the logs
258
    2. allowedUsers - User who are allowed to submit
259
    3. deniedUsers - Users not allowed to submit
260
* Added a new skin for Ecological Society of America. 
261
* Created an Advanced search servlet which can be used from the web. 
262
* Various connections have been modified to be secure. e.g. connection between 
263
ldaps is made secure now, replication is done over secure channels.  
264

    
265
Performance:
266
* Reduced size of xml_nodes by creating a new table for holding nodes from 
267
  deleted documents and old revisions of the documents. 
268
* Provided a new variable in metacat.properties where more frequently searched 
269
  for paths can be specified. Seperate indexes are created for these paths 
270
  - so that search is faster.
271
* Included log4j for logging and debuging to prevent wasting of time in printing log statements. 
272

    
273
Release Notes for 1.5.0:
274
------------------------
275

    
276
This release comes with performace improvement, user interface enhancements,
277
and bug fixes. Below is the list of bug fixes and performance improvements. 
278

    
279
Bug Fixes:
280
* Modify property values of harvester registration servlets to match the
281
  servlet-mapping URL values in web.xml. The old values used the servlet
282
  class names. This worked in Tomcat 4 but seems to break in Tomcat 5 on
283
  Windows. The new values use the servlet-mapping URL values. This should
284
  work in both Tomcat 4 and Tomcat 5. (Bug 162)
285
* Re-implement logic to prune old log entries from the HARVEST_LOG and
286
  HARVEST_DETAIL_LOG tables. The old logic caused integrity constraint
287
  violations in the database because it tried to delete parent records from
288
  HARVEST_LOG prior to deleting child records from
289
  HARVEST_DETAIL_LOG. (Bug 162)
290
* In data registry, minor bugs fixed like the error page shows the link back
291
  to the form when error page was generated because of a document read
292
  request from search results page,  the successful delete button leading
293
  to a blank screen and the old ACL overwritten by the registry.
294
  (Bugs 1307, 1310, 1322, 1344, 1551)
295
* Changed the code to support insertion of following characters: ', `,
296
  charcters in the Numeric Character Reference format (&#xyz;) and
297
  characters like µ. Characters like µ will be converted to and stored in
298
  Numeric Character Reference format(&#xyz;). They will also be returned
299
  in Numeric Character Reference and it is upto the client to convert them
300
  and display them accordingly in the application. Partial fix provided by
301
  Johnoel Ancheta. (Bug 1538,1711)
302
* Spatial search failed on Oracle because of invalid entries made by
303
  some documents in the nodedata column of xml_nodes for paths involving
304
  'eastBoundingCoordinate', 'westBoundingCoordinate',
305
  'northBoundingCoordinate', 'southBoundingCoordinate'. A new column
306
  nodedatanumerical was added to xml_nodes table such that all the numerical
307
  nodedata is stored in this column and this column is now used for spatial
308
  search. (Bug 1703, 1718)
309
* In the default skin, clicking on the keywords on the home page did not
310
  result is a search being done. Fix provided by Owen Jones. (Bug 1768)
311
* Metacat generated a success message even when a document which didnt
312
  exsist was requested for deletion. This has been fixed. (Bug 1850)
313
* "packagetype" in xml-relation table was entered as eml200 namespace when
314
  an eml201 document was inserted. This is fixed now so that "packagetype"
315
  in xml-relation table points to eml201 namespace. (Bug 1979)
316
* System_id in xml_catalog pointed to http://knb.ecoinformatics.org/knb/
317
  earlier. Fixed such that it points to the locally installed metacat url. 
318
  (Bug 1986)
319
* Changes to the Query subsystem fix bugs that prevented attributes from 
320
  being expressed solely in the xpath query statement and the returnfield 
321
  values. For instance, a query URL may now include search strings like 
322
  '@packageId=sbclter%25' and return strings like 'returnfield=@packageId'.
323
  Previously, the attribute had to be appended to an element: 
324
  '/eml/@packageId=sbclter%25'. These fixes change DBQuery.java, 
325
  QuerySpecification.java, and QueryTerm.java (Bug 2052)
326
* Search query failed in case of Oracle if number of documents in the result
327
  were more than 1000. This has been fixed. (Bug 2000)
328
* Removed any occurence of enum which is now a keyword in Java 1.5
329

    
330

    
331
Enhancements:
332
* Major improvements done in user interface for the data registeries and
333
  various other skins. Improvements done based on suggestions from Mark
334
  Stromberg, Laura Downey and others. Improvements also done in resultset.xsl,
335
  the default skin and ldap templates. (Bug 1948)
336
* Coded added such that administrator can delete documents irrespective of
337
  who the document belongs to.
338
* Performance impovement done in searching of datasets. A part of the search
339
  time was taken up because of generation of resultset after the search had be
340
  done. So this was the sequence of events in earlier metacat
341
  1) Search for the given text
342
  2) A list of docids generated
343
  3) For each of the docids
344
     3a) Use xml_index and xml_nodes table to generate the string descibing
345
         the document including the returnfields requested in the search
346
  4) Add all the strings from step 3a to send back the resultant
347
     document. Here a decent amount of time was being taken by step 3a. 
348
  The algorithm is now modified by addition of two tables xml_queryresult and
349
  xml_returnfields and a user defined parameter xml_returnfield_count. The
350
  new algorithm works as follows:
351
  1) Search for the given text
352
  2) A list of docids is generated
353
  3) For the given set of return fields generate a unique string and check
354
     if that string exists in xml_returnfields
355
     3a) If string does not exist in xml_returnfield, then enter a new
356
         record usage_count as 1 and returnfield_string as the unique string
357
         generated above.
358
     3b) Else if the string exists, increment usage_count
359
  4) Given the docids from step 2 and the id of the returnfield record from
360
     step 3, query for any docids that already exist in xml_queryresult.
361
     For the docids that do exist, get the queryresult_string.
362
  5) For rest of the docids from step2 which were not found in step 4, do
363
     the following for each of the documents:
364
     5a) Use xml_index and xml_nodes table to generate the string descibing
365
         the document including the returnfields requested in the search
366
     5b) If usage_count of the record from step is more than
367
         xml_returnfield_count set in metacat.properties, then store the
368
         string in xml_queryresult as a record which has the returnfield_id
369
         representing the set of returnfields, docid representing the
370
         document and the string as queryresult_string.
371
  6) Add all the strings from step 4 and step 5a to send back the resultant
372
     document
373
  So the results from step 3a in previous algorithm are effectively cached
374
  and hence same computation is not done again and again for each search.
375
  When a document is deleted, all the entries for that document in
376
  xml_queryresult table are also deleted. When a document is updated, all
377
  the entries for that document in xml_queryresult table are deleted. This
378
  works fine because those entries will be generated and cached again the
379
  next time the document is part of a search is requested.
380
* Performance impovement done for % search.
381
* Following new functions added to metacat client API: a method to set access
382
  on an xml document and a method to get newest version for a given document.
383
* Implement a new HarvesterServlet for running Harvester as a servlet. This
384
  eliminates the need to run Harvester in a terminal window. By default, the
385
  HarvesterServlet is commented out in lib/web.xml.tomcat(3,4,5). The user
386
  documentation will be modified to instruct Harvester administrators to
387
  uncomment the HarvesterServlet entry.
388
* Minor enhancement to support multiple email addresses for harvester
389
  administrator and site contact. Each address is separated by a comma or
390
  semicolon.
391
* Increase number of rows in Harvest List Editor from 300 to 1200.
392
* Changed default maxHarvests value to 0. Added logic to ignore maxHarvests
393
  value when it is set to 0 or a negative number. This allows Harvester to
394
  run indefinitely without shutting down after reaching a maximum number of
395
  harvests. The previous default value of 30 would cause Harvester to
396
  terminate after 30 harvests.
397

    
398
Details of all changes can be found in the bug database here:
399
http://bugzilla.ecoinformatics.org/buglist.cgi?product=Metacat&target_milestone=1.5
400

    
401

    
402
Release Notes for 1.4.0:
403
------------------------
404

    
405
This is a major release, and is the first to introduce many new features to
406
Metacat.  Some of the major new features in this version of Metacat include:
407

    
408
* Added a new 'Harvester' that allows documents to be periodically pulled
409
  from distributed sources into metacat, useful for interfacing with other
410
  system types. See the Metacat Tour for details.
411
* Added new 'skins' capability to allow the GUI for the metacat web interface
412
  to be more easily customized to fit into site needs.  The skin is based on
413
  a flexible mix of XSLT, CSS, and Javascript.
414
* Added a web-based metadata entry form for submitting limited EML documents
415
  as part of a data registry.  The GUI for the registry is customizable and 
416
  is integrated with the 'skins' system for the main metacat interface.  The
417
  registry subsystem is written in Perl, and can simultaneously be used to 
418
  present multiple 'registry' interfaces.
419
* A new 'client API' has been developed and implemented in Java and in Perl 
420
  so that metacat functions can be accessed from any program in those
421
  languages.  The client API supports the major metacat servlet actions,
422
  including login(), logout(), query(), insert(), update(), delete(), and 
423
  upload(). See the Metacat Tour for details.
424
* Added a new 'getlog' action that produces a usage history for all major
425
  events.  So now an XML report can be generated for document reads, inserts,
426
  deletes, etc.  See the new section in the Metacat Tour.
427
* Added a new 'buildindex' action that can rebuild the index entries for any
428
  document in the database.
429
* The configuration file for metacat (metacat.properties) has been moved out
430
  of the jar file and into the WEB-INF directory, allowing far easier changes
431
  to the configuration parameters.
432
* Results in default web interface are sorted by title in the XSLT 
433
  (configurable)
434
* Many bugs were fixed.
435

    
436
Details of all changes can be found in the bug database here:
437
http://bugzilla.ecoinformatics.org/buglist.cgi?product=Metacat&target_milestone=1.4
438

    
439
Release Notes for 1.3.1:
440
------------------------
441

    
442
This is a simple interim bug fix. No major functionality changes. Bugs fixed 
443
include:
444
 1) Metacat 1.3.0 doesn't work in Java 1.3 because a subtle API differnce in 
445
    Java 1.3 and Java 1.4. Currently, Metacat 1.3.1 will work in both Java 1.3 
446
    and Java 1.4.
447
 2) Distribution package size was reduced.
448

    
449

    
450
Release Notes for 1.3.0
451
------------------------
452

    
453
In 1.3.0 release, the structure of the xml_access table was changed and a new
454
table, xml_accesssubtree was added. If you try to update a previously 
455
installed Metacat, you should run a script file to updated the table structure 
456
before installation.
457
For Oracle user: At the SQLPLUS prompt type the following -
458
@src/reviseformetacat13.sql
459
For Postgresql user: At install directory prompt type the following -
460
psql exp < src/reviseformetacat13_postgres.sql
461
(where 'exp' is the database name).
462

    
463
After installation, user should run "ant schemasql" command to register EML2
464
schema in xml_catalog table.
465

    
466
If you are a new Metacat user, this step is unneeded.
467

    
468
Note: 1) We recommend to use Tomcat 4 and JAVA 1.4 to run Metacat. Otherwise, 
469
         it will cause potential replication issues.
470
      2) Delete the xercesImpl.jar and xmlParserAPIs.jar files 
471
         which are in $CATALINA_HOME/common/endorsed. They are old version and
472
         don't support XML schema validation.
473

    
474
New Features in 1.3.0
475
  1) Partialy support EML2 document. User can store, query, read and write
476
     EML2 documents. However, Metacat only support access control in resource
477
     level. The subtree level access control will be ignored.
478
  2) Support other xml document base on namespace/schema.
479
  3) Support query for attribute value
480
  4) Assign MIME type to data file base on metadata when user try to read it.
481
  5) Owner can assign access rules to a document which does not have access 
482
     document to apply it.
483
  6) Support exporting single file, not only whole package
484
  7) Resupport Microsoft SQL Server.
485

    
486
Fixes in 1.3.0:
487
  1) Couldn't finish delta T replication for large set of documents.
488
  2) Couldn't create access control during delta T replication.
489
  3) Eorr will be written to a seperated log file if some documents
490
     were failed in replication.
491
  4) Decrease the time to create access rules during insert or update 
492
     a package.
493
     
494
Documentation
495
-------------
496
See the docs directory for detailed documentation and installation
497
instructions.
498

    
499
Details of the Metacat architecture can be found on the website for
500
the Knowledge Network for Biocomplexity (KNB):
501

    
502
  http://knb.ecoinformatics.org/software/metacat/
503

    
504
Contributions to this work are welcome.  Please see the above web site
505
for details on how to contribute.
506

    
507
Major Known Bugs or Feature Requests (see http://bugzilla.ecoinformatics.org)
508
-----------------------------------------------------------------------------
509
If you discover a bug please report it, either by email (above) or by using
510
our bug tracking system (http://bugzilla.ecoinformatics.org). There is a
511
list of currently unimplemented features in Bugzilla that we are working on
512
for the next release.
513

    
514
Legalese
515
--------
516
This software is copyrighted by The Regents of the University of California
517
and the National Center for Ecological Analysis and Synthesis
518
and licensed under the GNU GPL; see the 'LICENSE' file for
519
details.
520

    
521
This material is based upon work supported by the
522
National Science Foundation under Grant No. DEB99-80154, DBI99-04777, and
523
0225676 for SEEK.  Any opinions, findings and conclusions or recomendations 
524
expressed in this material are those of the author(s) and do not necessarily 
525
reflect the views of the National Science Foundation (NSF).
526

    
527
This software is partially supported by a grant from the Andrew W. 
528
Mellon Foundation.
529

    
530
This product includes software developed by the Apache Software
531
Foundation (http://www.apache.org/). See the LICENSE file in lib/apache
532
for details.
533

    
534
The source code, object code, and documentation in the com.oreilly.servlet
535
package is copyright and owned by Jason Hunter. See the cos-license.html file
536
for details of the license.  Licensor retains title to and ownership of the
537
Software and all enhancements, modifications, and updates to the Software.
538

    
539
This software includes the JDBC driver for PostgreSQL.  See the 
540
postgresql-license.txt file for details.
(2-2/5)