<revisionid>
The <revisionid> element indicates the revision number
         or revision ID of the book. The processing implementation determines
         how the level is displayed. Common methods include using a dash, for
         example "-01", or a period, such as ".01".
      
      Content models
See appendix for information about this element in OASIS document type shells.
Inheritance
- topic/ph bookmap/revisionid
Example
<bookchangehistory>
  <edited>
    <person>Joe T. Editor</person>
    <revisionid>1</revisionid>
    <completed><year>2008</year><month>03</month><day>15</day></completed>
  </edited>
  <edited>
    <person>Joe T. Editor</person>
    <revisionid>2</revisionid>
    <completed><year>2008</year><month>10</month><day>13</day></completed>
  </edited>
</bookchangehistory>Attributes
The following attributes are available on this element: Universal attribute group, @outputclass, and @keyref.