<section><title>Document Revisions</title>

  <para>

   The attribute <sgmltag>revisionflag</sgmltag> is usefull to identify the changes between two revisions of a document. This information is managed by dblatex, that adds revision bars in the margin of the paragraphs changed, such like in this <phrase revisionflag="changed">paragraph</phrase>.

  </para>

  <para>

   Adding the revision flags can be manual, but its is tedious and error prone. The <ulink url="http://sourceforge.net/projects/diffmk/">diffmk</ulink> tool by Norman Walsh can do the work for you. See <ulink url="http://www.sagehill.net/docbookxsl/Changebars.html"/> for more details about how to use it.

  </para>

<note><para>

With old changebar packages the revision bars only appear when using the "dvips"

driver. This limitation has been fixed with changebar greater or equal 

to v3.5c.

</para></note>

  </section>