DocBook V4.5b1 is now available.
DocBook V4.5b1 is now available from OASIS and the docbook.org mirror.
The principle motivation for DocBook V4.5 is process-related, the TC wants to publish a version of DocBook under the new OASIS TC Process now that the process has been officially adopted. The Technical Committee expects to take V4.5 through the entire process to OASIS Standard. Once V4.5 has been reviewed and accepted as a Committee Specification, the various customizations and modules (Simplified, EBNF, etc.) will be updated to be based on V4.5.
Making another release was an opportunity to incorporate some recently approved enhancements:
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RFE 1055480: Allow <revnumber> to be optional in <revision> per the November, 2004 meeting.
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RFE 1070458: Allow <colophon> in <article> per the November, 2004 meeting.
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RFE 1070770: Allow <procedure> in <example> per the November, 2004 meeting.
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RFE 1071686: Add isrn as a value of class attribute on <biblioid>, <citebiblioid>, <bibliosource>, and <bibliorelation> per the December, 2004 meeting.
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Added <mathphrase> per the February, 2005 meeting.
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Added <termdef> per the March, 2005 meeting.
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Allow common attributes on HTML table elements (<tr>, <td>, etc.) per the April, 2005 meeting.
Most of these changes have already been reflected in recent versions of DocBook NG.