DocBook NG is really more of an appetizer for the main DocBook 5.0 course to come later, but Norm Walsh has released the DocBook NG: "Lillet" release.
As of the April DocBook TC meeting, we've also adopted an official namespace for DocBook NG and 5.0: http://docbook.org/ns/docbook
Norm has Lillet releases for full DocBook NG, Simplified NG (Thanks, Norm!), Slides NG and Website NG! From Norm's post, changes in this release include:
Support
<annotation>s as per the 20 Apr 2005 DocBook TC meeting.Allow
<alt>in more placesAllow
<area>to have eitherlinkendsorxlink:href.Allow
floatstyleon<table>and<informaltable>. Removefloat.Restore
<caption>to<mediaobject>; add it to<figure>,<example>,<table>,<informalfigure>,<informalexample>, and<informaltable>.Change
methodattribute values to lowercase; makeactionanxsd:anyURIon<html:form>. Addenctypeandacceptattributes to<html:form>; support<fieldset>.Move the HTML form elements to a separate extended schema.
Allow common attributes on HTML table elements; allow
orient,pgwide,tabstyle, andfloatstyleon HTML table element.Allow
<title>to be optional on<equation>.Restored
<olink>.
The files for this release can be downloaded at: http://docbook.org/docbook-ng/lillet/index.html or Simplified NG at: http://docbook.org/docbook-ng/simple/lillet/index.html.
Bon Appétit!
See also: DocBook