Numbered Headings, clarification required (ODF all versions)

["Alex Brown" <alexb@griffinbrown.co.uk>]

Dear all,

Consider the following document which is I believe a valid (draft 1.2 in
this case) ODF document.

By my reading of the spec it is unclear whether a fully-conformant
application should display numbers alongside the headings. This
difficulty revolves around whether it is sufficient simply to create a
<number:number-style>, or whether some descendant elements are in fact
needed. The schema says not; so in that case what happens when no
descendant elements are present?

<?xml version="1.0" encoding="UTF-8"?>
<office:document-content
xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0"
  xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" 
  xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0"
  xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0"
office:version="1.2">
  <office:automatic-styles>
   <number:number-style style:name="NumbHead"></number:number-style>
  </office:automatic-styles>
  <office:body>
    <office:text>
      <text:h text:outline-level="1" text:style-name="NumbHead">First
Heading</text:h>
      <text:p>Some text</text:p>
      <text:h text:outline-level="1" text:style-name="NumbHead">Second
Heading</text:h>
      <text:p>Some text</text:p>
      <text:h text:outline-level="1" text:style-name="NumbHead">Third
Heading</text:h>
      <text:p>Some text</text:p>
    </office:text>
  </office:body>
</office:document-content>

- Alex.