title: Modification timestamp for documents in a BaseX database
body: <p>I have a gnu make system, and would like to trigger rules based on updates to documents in a BaseX XML database. In other words, something like <code>archive(member)</code> can be used in gnu make to refer to a member of an archive, I would like to use <code>db(foo.xml)</code>. Or, since that's probably not possible, some workaround involving creating dummy files with the correct timestamps, but I can't even figure out how to retrieve the modification date from a document in a BaseX database.</p>