When a document is released, a PDF of the document is stored in the tags tree, tagged with a new version number. If, for example, the SCMP is released, a PDF of trunk/doc/scmp/scmp.tex should be stored as tags/doc/scmp/scmp-version.pdf, and the version information inside the document should be updated to reflect the new version. The revision number should be removed from the version information in released documents.