-18 May 2000
+19 June 2000
-Changes from DocBook V3.1 to DocBook V4.0:
+Changes from DocBook V3.1 to DocBook V4.1:
Markup:
- Added synopsis markup for modern programming languages (e.g, object
oriented languages like Java, C++, and IDL)
- Renamed DocInfo to PrefaceInfo, ChapterInfo, AppendixInfo, etc.
+- Comment was renamed Remark
+- InterfaceDefinition was removed
Other:
--- /dev/null
+19 June 2000
+
+Changes from DocBook V4.0 to DocBook V4.1:
+
+No user-visible changes; removed some 4.0 future use comments that had
+accidentally been left in the DTD and fixed a couple of incorrect FPIs.
+See 40chg.txt for a list of the significant changes.
-18 January 2000
+19 June 2000
Backwards-incompatible changes to DocBook that are planned for V5.0:
- DocBook V5.0 will be an XML DTD. This will require a wide range of
changes. As a result, DocBook V5.0 will more closely resemble
- The XML version of DocBook V4.0 than the SGML version.
+ The XML version of DocBook V4.1 than the SGML version.
- Parameter entity reorganization may greatly reduce many
content models. The goal of this effort is to remove a large
This ChangeLog is all that remains from the previous incarnation of
this CVS repository that was irretrievably lost.
-1999-02-01 Norman Walsh <ndw@nwalsh.com>
+2000-06-19 Norman Walsh <ndw@nwalsh.com>
- * readme.txt: Updated readme, DocBook 3.1 released.
+ * 40chg.txt: Added notes about comment and interfacedefinition
- * docbook.dtd, docbook.dcl, docbook.cat, dbnotn.mod, dbhier.mod, dbgenent.mod, dbcent.mod, dbpool.mod:
- Updated version number
+ * 41chg.txt: New file.
- * cals-tbl.dtd: For DocBook 3.1
+ * 50issues.txt, dbcent.mod, dbgenent.mod, dbhier.mod, dbnotn.mod, dbpool.mod, docbook.cat, docbook.dcl, readme.txt:
+ Updated version numbers to 4.1
- * 50issues.txt, 40issues.txt: Fixed date
+ * dbhier.mod, dbpool.mod: Removed 4.0 future use comments
- * 31chg.txt: Changed date, updated owner identifier
+ * docbook.cat: Fixed version number in comment
-1999-01-31 Norman Walsh <ndw@nwalsh.com>
+ * docbook.dtd: DocBook V4.1 released.
- * dbpool.mod:
- Added missing semicolons to several parameter entity references.
- Changed Constant and VarName to be * not + since they contain #PCDATA.
+2000-05-18 Norman Walsh <ndw@nwalsh.com>
- * dbhier.mod: Added missing semicolon to a parameter entity reference
+ * 40chg.txt, dbcent.mod, dbgenent.mod, dbhier.mod, dbnotn.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd, readme.txt:
+ Removed references to beta6
-1999-01-21 Norman Walsh <ndw@nwalsh.com>
+ * docbook.dtd: DocBook V4.0 released.
- * dbhier.mod: Added missing semicolon in PE invokation.
+2000-04-10 Norman Walsh <ndw@nwalsh.com>
-1999-01-14 Norman Walsh <ndw@nwalsh.com>
+ * 40chg.txt, dbcent.mod, dbgenent.mod, dbhier.mod, dbnotn.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd, readme.txt:
+ Updated release date and version to 4.0beta6
- * readme.txt: New file.
+ * dbpool.mod: Added support for EBNF hook; fixed equation content bug
- * dbcent.mod, dbgenent.mod, dbhier.mod, dbnotn.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd:
- BETA1 Release
+2000-04-03 Norman Walsh <ndw@nwalsh.com>
- * 50issues.txt: Added known changes.
+ * 40chg.txt: Added note about renaming DocInfo to *Info.
- * docbook.dtd: Fixed copyright and contact info
+ * 40chg.txt, dbcent.mod, dbgenent.mod, dbhier.mod, dbnotn.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd, readme.txt:
+ Updated version numbers
- * dbpool.mod:
- Updated copyright notice. Added IndexTerms to many parameter
- entities and a couple of content models. Removed yes.attval
- and linkendsreq.attrib.
+2000-03-24 Norman Walsh <ndw@nwalsh.com>
- * dbnotn.mod: Fixed copyright and contact info
+ * 40chg.txt, dbcent.mod, dbgenent.mod, dbhier.mod, dbnotn.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd, readme.txt:
+ Updated version numbers
- * dbhier.mod:
- Updated copyright notice. Added IndexTerms to several elements.
- Changed order of SubTitle outside of *Info elements to:
- Title, Subtitle?, TitleAbbrev? (in earlier test releases, it
- was Title, TitleAbbrev?, Subtitle?).
+ * 50issues.txt: Added note about PE reorg
- * dbcent.mod: Fixed copyright and contact info
+ * dbefsyn.mod: Removed
- * 31chg.txt: Improved wording, updated
+ * dbpool.mod: Removed ELEMENT from comments to ease text searching of the DTD.
+ Merged dbefsyn.mod into dbpool.mod
+ Added Modifier as an optional element at the end of MethodSynopsis
+ and MethodParam.
- * dbpool.mod: Added "Journal", "Series", "Set", and "Manuscript" to the
- list of allowed values in Pubwork on CiteTitle.
+2000-03-07 Norman Walsh <ndw@nwalsh.com>
-1998-12-15 Norman Walsh <ndw@nwalsh.com>
+ * 40chg.txt, dbcent.mod, dbgenent.mod, dbhier.mod, dbnotn.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd, readme.txt:
+ Updated internal versions to beta3
- * docbook.dtd:
- Corrected copyright notice, contact info, and owner identifiers
- in examples
+2000-03-03 Norman Walsh <ndw@nwalsh.com>
- * docbook.cat: Corrected contact info
+ * dbpool.mod: Removed erroneous comment about inline synopses
- * dbpool.mod, dbnotn.mod, dbhier.mod:
- Corrected copyright notice and contact info
+2000-03-02 Norman Walsh <ndw@nwalsh.com>
- * dbcent.mod: Corrected copyright notice
+ * 30chg.txt, 31chg.txt, 40issues.txt, 50issues.txt, announce.txt, cals-tbl.dtd, dbcent.mod, dbgenent.mod, dbhier.mod, dbnotn.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd, readme.txt:
+ Version 3.1
- * 50issues.txt:
- Added note that this list needs to be filled out before V4.0
+ * 30chg.txt, 40issues.txt, announce.txt, cals-tbl.dtd, dbgenent.mod, dbhier.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd:
+ branches: 1.1.1;
+ Initial revision
- * 31chg.txt:
- Fixed date, added QAndASet, MediaObject, and InlineMediaObject.
+ * 30chg.txt, 40issues.txt, announce.txt, cals-tbl.dtd, dbgenent.mod, dbhier.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd:
+ New file.
- * docbook.dcl: Changed version number to 3.1
+ * 31chg.txt, 40chg.txt, 40issues.txt, 50issues.txt, cals-tbl.dtd, dbcent.mod, dbefsyn.mod, dbgenent.mod, dbhier.mod, dbnotn.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd, readme.txt:
+ Version 4.0beta2
-1998-12-14 Norman Walsh <ndw@nwalsh.com>
+ * 50issues.txt: Added warning about exchange table model
- * dbpool.mod: Fixed typo in definition of qandaset.mix.
+ * dbefsyn.mod, dbpool.mod: Added ooclass, oointerface, and ooexception as wrappers for modifiers
+ and names in classsynopsis. Also allow them inline.
+
+ Fixed SGML PE parsing problem with hook PEs.
- * dbhier.mod: Removed setinfo.char.mix. It was unused.
+ * dbhier.mod, dbpool.mod: Added hook PEs for future module extension
- * dbpool.mod: Added CiteTitle to bibliocomponent.mix
+ * dbpool.mod, docbook.dtd: Removed reference to sgml-features PE
- Reworked QAndASet. DefaultLabel loses the Label value. Label
- on Question and Answer becomes an element. The semantics are
- that a Label, if present, is always used (which you can override
- with your stylesheet, if required).
-
-1998-12-07 Norman Walsh <ndw@nwalsh.com>
-
- * dbpool.mod:
- DefaultMark/Mark become DefaultLabel/Label on QandASet/Question/Answer
-
-1998-12-06 Norman Walsh <ndw@nwalsh.com>
-
- * dbpool.mod:
- Added InformalFigure to informal.class, where it had accidentally
- been left out.
-
- * dbpool.mod:
- Changed the 'label' value of DefaultMark on QandASet to 'mark'
- since the attribute is 'mark'.
-
- * dbpool.mod: Revised QandASet. QandAEntry now recurses in Answer, not
- QandAEntry. Question and Answer no longer have a Title,
- they have a Mark attribute. Renamed Mark attribute on
- QandASet to DefaultMark.
-
-1998-12-01 Norman Walsh <ndw@nwalsh.com>
-
- * 50issues.txt: Branch for 3.1
-
- * 50issues.txt: Initial version
-
- * dbgenent.mod, dbhier.mod, docbook.cat, docbook.dcl, docbook.dtd, dbpool.mod:
- 3.1 changes
-
- * 31chg.txt: Branch for 3.1 testing
-
- * 31chg.txt: Initial version
-
- * dbcent.mod, dbnotn.mod: Branch for 3.1 testing
-
- * dbcent.mod, dbnotn.mod: Initial version
-
- * 40issues.txt, cals-tbl.dtd, dbgenent.mod, dbhier.mod, dbpool.mod, docbook.cat, docbook.dcl, docbook.dtd:
- Branch for 3.1 testing
<!-- ...................................................................... -->
-<!-- DocBook character entities module V4.0 ............................... -->
+<!-- DocBook character entities module V4.1 ............................... -->
<!-- File dbcent.mod ...................................................... -->
<!-- Copyright 1992-2000 HaL Computer Systems, Inc.,
declaration that uses the public identifier shown below:
<!ENTITY % dbcent PUBLIC
- "-//OASIS//ENTITIES DocBook Character Entities V4.0//EN">
+ "-//OASIS//ENTITIES DocBook Character Entities V4.1//EN">
%dbcent;
See the documentation for detailed information on the parameter
<!-- ...................................................................... -->
-<!-- DocBook additional general entities V4.0 ............................. -->
+<!-- DocBook additional general entities V4.1 ............................. -->
<!-- Copyright 1992-2000 HaL Computer Systems, Inc.,
O'Reilly & Associates, Inc., ArborText, Inc., Fujitsu Software
declaration that uses the public identifier shown below:
<!ENTITY % dbgenent PUBLIC
- "-//OASIS//ENTITIES DocBook Additional General Entities V4.0//EN"
+ "-//OASIS//ENTITIES DocBook Additional General Entities V4.1//EN"
%dbgenent;
-->
%all-titles;
-->
-<!-- End of DocBook additional general entities V4.0 ...................... -->
+<!-- End of DocBook additional general entities V4.1 ...................... -->
<!-- ...................................................................... -->
<!-- ...................................................................... -->
-<!-- DocBook document hierarchy module V4.0 ............................... -->
+<!-- DocBook document hierarchy module V4.1 ............................... -->
<!-- File dbhier.mod ...................................................... -->
<!-- Copyright 1992-2000 HaL Computer Systems, Inc.,
declaration that uses the public identifier shown below:
<!ENTITY % dbhier PUBLIC
- "-//OASIS//ELEMENTS DocBook Document Hierarchy V4.0//EN">
+ "-//OASIS//ELEMENTS DocBook Document Hierarchy V4.1//EN">
%dbhier;
See the documentation for detailed information on the parameter
<![ %book.content.module; [
<!ENTITY % book.module "INCLUDE">
<![ %book.module; [
-<!--FUTURE USE (V4.0):
-......................
-The %article.class; entity *may* be removed from the Book content model.
-(Article may be made part of a new top-level document hierarchy.)
-......................
--->
<!ENTITY % local.book.attrib "">
<!ENTITY % book.role.attrib "%role.attrib;">
<!ENTITY % part.module "INCLUDE">
<![ %part.module; [
-<!-- Note that Part was to have its content model reduced in V4.0. This
+<!-- Note that Part was to have its content model reduced in V4.1. This
change will not be made after all. -->
<!ENTITY % local.part.attrib "">
<![ %article.module; [
<!-- An Article is a chapter-level, stand-alone document that is often,
but need not be, collected into a Book. -->
-<!--FUTURE USE (V4.0):
-......................
-The %nav.class; entity now allows ToC; ToCchap will be allowed instead.
-RefEntry will be removed from the main content of Article.
-......................
--->
<!ENTITY % local.article.attrib "">
<!ENTITY % article.role.attrib "%role.attrib;">
<!--end of article.attlist-->]]>
<!--end of article.module-->]]>
-<!-- End of DocBook document hierarchy module V4.0 ........................ -->
+<!-- End of DocBook document hierarchy module V4.1 ........................ -->
<!-- ...................................................................... -->
<!-- ...................................................................... -->
-<!-- DocBook notations module V4.0 ........................................ -->
+<!-- DocBook notations module V4.1 ........................................ -->
<!-- File dbnotn.mod ...................................................... -->
<!-- Copyright 1992-2000 HaL Computer Systems, Inc.,
declaration that uses the public identifier shown below:
<!ENTITY % dbnotn PUBLIC
- "-//OASIS//ENTITIES DocBook Notations V4.0//EN">
+ "-//OASIS//ENTITIES DocBook Notations V4.1//EN">
%dbnotn;
See the documentation for detailed information on the parameter
<!-- ...................................................................... -->
-<!-- DocBook information pool module V4.0 ................................. -->
+<!-- DocBook information pool module V4.1 ................................. -->
<!-- File dbpool.mod ...................................................... -->
<!-- Copyright 1992-2000 HaL Computer Systems, Inc.,
declaration that uses the public identifier shown below:
<!ENTITY % dbpool PUBLIC
- "-//OASIS//ELEMENTS DocBook Information Pool V4.0//EN">
+ "-//OASIS//ELEMENTS DocBook Information Pool V4.1//EN">
%dbpool;
See the documentation for detailed information on the parameter
below. -->
<!ENTITY % local.person.ident.mix "">
-<!--FUTURE USE (V4.0):
-......................
-AuthorBlurb and Affiliation will be removed from %person.ident.mix; and a new
-wrapper element created to allow association of those two elements with
-Author name information.
-......................
--->
<!ENTITY % person.ident.mix
"Honorific|FirstName|Surname|Lineage|OtherName|Affiliation
|AuthorBlurb|Contrib %local.person.ident.mix;">
<!--end of glossentry.attlist-->]]>
<!--end of glossentry.module-->]]>
-<!--FUTURE USE (V4.0):
-......................
-GlossTerm *may* be split into an element that appears in a
-Glossary and an element that can appear in the main text.
-......................
--->
<!-- GlossTerm (defined in the Inlines section, below)-->
<!ENTITY % glossdef.module "INCLUDE">
<![ %glossdef.module; [
<!ENTITY % author.module "INCLUDE">
<![ %author.module; [
-<!--FUTURE USE (V4.0):
-......................
-AuthorBlurb and Affiliation will be removed from %person.ident.mix; and a new
-wrapper element created to allow association of those two elements with
-Author name information.
-......................
--->
<!ENTITY % local.author.attrib "">
<!ENTITY % author.role.attrib "%role.attrib;">
<!ENTITY % editor.module "INCLUDE">
<![ %editor.module; [
-<!--FUTURE USE (V4.0):
-......................
-AuthorBlurb and Affiliation will be removed from %person.ident.mix; and a new
-wrapper element created to allow association of those two elements with
-Editor name information.
-......................
--->
<!ENTITY % local.editor.attrib "">
<!ENTITY % editor.role.attrib "%role.attrib;">
<!ENTITY % othercredit.module "INCLUDE">
<![ %othercredit.module; [
-<!--FUTURE USE (V4.0):
-......................
-AuthorBlurb and Affiliation will be removed from %person.ident.mix; and a new
-wrapper element created to allow association of those two elements with
-OtherCredit name information.
-......................
--->
<!ENTITY % local.othercredit.attrib "">
<!ENTITY % othercredit.role.attrib "%role.attrib;">
<!ENTITY % person.ident.module "INCLUDE">
<![ %person.ident.module; [
-<!--FUTURE USE (V4.0):
-......................
-AuthorBlurb and Affiliation will be removed from %person.ident.mix; and
-a new wrapper element created to allow association of those two elements
-with Contrib name information.
-......................
--->
<!ENTITY % contrib.module "INCLUDE">
<![ %contrib.module; [
<!ENTITY % local.contrib.attrib "">
<!--end of seeseealso.module-->]]>
<!--end of indexterm.content.module-->]]>
-<!-- End of DocBook information pool module V4.0 .......................... -->
+<!-- End of DocBook information pool module V4.1 .......................... -->
<!-- ...................................................................... -->
-- ...................................................................... --
- -- Catalog data for DocBook V4.0 ........................................ --
+ -- Catalog data for DocBook V4.1 ........................................ --
-- File docbook.cat ..................................................... --
-- Please direct all questions, bug reports, or suggestions for
information, see http://www.oasis-open.org/.
--
- -- This is the catalog data file for Version 3.1 of the DocBook DTD.
- It is provided as a convenience in building your own catalog files.
- You need not use the filenames listed here, and need not use the
- filename method of identifying storage objects at all. See the
- documentation for detailed information on the files associated with
- the DocBook DTD. See SGML Open Technical Resolution 9401 for
- detailed information on supplying and using catalog data.
+ -- This is the catalog data file for DocBook V4.1. It is provided as
+ a convenience in building your own catalog files. You need not use
+ the filenames listed here, and need not use the filename method of
+ identifying storage objects at all. See the documentation for
+ detailed information on the files associated with the DocBook DTD.
+ See SGML Open Technical Resolution 9401 for detailed information
+ on supplying and using catalog data.
--
-- ...................................................................... --
-- SGML declaration associated with DocBook ............................. --
-DTDDECL "-//OASIS//DTD DocBook V4.0//EN" "docbook.dcl"
+DTDDECL "-//OASIS//DTD DocBook V4.1//EN" "docbook.dcl"
-- ...................................................................... --
-- DocBook driver file .................................................. --
-PUBLIC "-//OASIS//DTD DocBook V4.0//EN" "docbook.dtd"
+PUBLIC "-//OASIS//DTD DocBook V4.1//EN" "docbook.dtd"
-- ...................................................................... --
-- DocBook modules ...................................................... --
PUBLIC "-//USA-DOD//DTD Table Model 951010//EN" "cals-tbl.dtd"
-PUBLIC "-//OASIS//ELEMENTS DocBook Information Pool V4.0//EN" "dbpool.mod"
-PUBLIC "-//OASIS//ELEMENTS DocBook Document Hierarchy V4.0//EN" "dbhier.mod"
-PUBLIC "-//OASIS//ENTITIES DocBook Additional General Entities V4.0//EN" "dbgenent.mod"
-PUBLIC "-//OASIS//ENTITIES DocBook Notations V4.0//EN" "dbnotn.mod"
-PUBLIC "-//OASIS//ENTITIES DocBook Character Entities V4.0//EN" "dbcent.mod"
+PUBLIC "-//OASIS//ELEMENTS DocBook Information Pool V4.1//EN" "dbpool.mod"
+PUBLIC "-//OASIS//ELEMENTS DocBook Document Hierarchy V4.1//EN" "dbhier.mod"
+PUBLIC "-//OASIS//ENTITIES DocBook Additional General Entities V4.1//EN" "dbgenent.mod"
+PUBLIC "-//OASIS//ENTITIES DocBook Notations V4.1//EN" "dbnotn.mod"
+PUBLIC "-//OASIS//ENTITIES DocBook Character Entities V4.1//EN" "dbcent.mod"
-- ...................................................................... --
-- ISO entity sets ...................................................... --
PUBLIC "ISO 8879:1986//ENTITIES Russian Cyrillic//EN" "iso-cyr1.gml"
PUBLIC "ISO 8879:1986//ENTITIES Non-Russian Cyrillic//EN" "iso-cyr2.gml"
- -- End of catalog data for DocBook V4.0 ................................. --
+ -- End of catalog data for DocBook V4.1 ................................. --
-- ...................................................................... --
<!SGML "ISO 8879:1986"
-- ...................................................................... --
- -- DocBook SGML declaration V4.0 ........................................ --
+ -- DocBook SGML declaration V4.1 ........................................ --
-- file docbook.dcl ..................................................... --
CHARSET
APPINFO NONE
- -- End of DocBook SGML declaration V4.0 ................................. --
+ -- End of DocBook SGML declaration V4.1 ................................. --
-- ...................................................................... --
>
<!-- ...................................................................... -->
-<!-- DocBook DTD V4.0 ..................................................... -->
+<!-- DocBook DTD V4.1 ..................................................... -->
<!-- File docbook.dtd ..................................................... -->
<!-- Copyright 1992-2000 HaL Computer Systems, Inc.,
<!-- ...................................................................... -->
-<!-- This is the driver file for V4.0 of the DocBook DTD.
+<!-- This is the driver file for V4.1 of the DocBook DTD.
Please use the following formal public identifier to identify it:
- "-//OASIS//DTD DocBook V4.0//EN"
+ "-//OASIS//DTD DocBook V4.1//EN"
For example, if your document's top-level element is Book, and
you are using DocBook directly, use the FPI in the DOCTYPE
declaration:
- <!DOCTYPE Book PUBLIC "-//OASIS//DTD DocBook V4.0//EN" [...]>
+ <!DOCTYPE Book PUBLIC "-//OASIS//DTD DocBook V4.1//EN" [...]>
Or, if you have a higher-level driver file that customizes DocBook,
use the FPI in the parameter entity declaration:
- <!ENTITY % DocBookDTD PUBLIC "-//OASIS//DTD DocBook V4.0//EN">
+ <!ENTITY % DocBookDTD PUBLIC "-//OASIS//DTD DocBook V4.1//EN">
%DocBookDTD;
The DocBook DTD is accompanied by an SGML declaration.
<!ENTITY % dbnotn.module "INCLUDE">
<![ %dbnotn.module; [
<!ENTITY % dbnotn PUBLIC
-"-//OASIS//ENTITIES DocBook Notations V4.0//EN">
+"-//OASIS//ENTITIES DocBook Notations V4.1//EN">
%dbnotn;
<!--end of dbnotn.module-->]]>
<![ %dbcent.module; [
<!ENTITY euro SDATA "[euro ]"><!-- euro sign, U+20AC NEW -->
<!ENTITY % dbcent PUBLIC
-"-//OASIS//ENTITIES DocBook Character Entities V4.0//EN">
+"-//OASIS//ENTITIES DocBook Character Entities V4.1//EN">
%dbcent;
<!--end of dbcent.module-->]]>
<!ENTITY % dbpool.module "INCLUDE">
<![ %dbpool.module; [
<!ENTITY % dbpool PUBLIC
-"-//OASIS//ELEMENTS DocBook Information Pool V4.0//EN">
+"-//OASIS//ELEMENTS DocBook Information Pool V4.1//EN">
%dbpool;
<!--end of dbpool.module-->]]>
<!ENTITY % dbhier.module "INCLUDE">
<![ %dbhier.module; [
<!ENTITY % dbhier PUBLIC
-"-//OASIS//ELEMENTS DocBook Document Hierarchy V4.0//EN">
+"-//OASIS//ELEMENTS DocBook Document Hierarchy V4.1//EN">
%dbhier;
<!--end of dbhier.module-->]]>
<!ENTITY % dbgenent.module "INCLUDE">
<![ %dbgenent.module; [
<!ENTITY % dbgenent PUBLIC
-"-//OASIS//ENTITIES DocBook Additional General Entities V4.0//EN">
+"-//OASIS//ENTITIES DocBook Additional General Entities V4.1//EN">
%dbgenent;
<!--end of dbgenent.module-->]]>
-<!-- End of DocBook DTD V4.0 .............................................. -->
+<!-- End of DocBook DTD V4.1 .............................................. -->
<!-- ...................................................................... -->
-README for DocBook V4.0
+README for DocBook V4.1
-This is DocBook V4.0, released 18 May 2000.
+This is DocBook V4.1, released 19 June 2000.
See 40chg.txt for information about what has changed since DocBook 3.1.