The TopLeaf Plugin for XMetaL adds the publishing power of TopLeaf to the author/editing capabilities of XMetaL Author Enterprise. The result is a full featured out of the box DITA publishing tool.
Download the plugin here
First install TopLeaf.
You must also have the Enterprise edition of XMetaL Author version 6.0 or later installed.
Run the TopLeaf XMetaL Plugin installer and a TopLeaf PDF option will appear in the XMetaL Generate Output dialog.