Updating DTD to agree with its use in doc's

[cc_brewster]

A few years ago my department defined a DTD for a projected class of documents. Like the unused parts of the US Constitution, this DTD has details that are never actually used in the documents we've made. I want to clean it up. Is there any tool that looks at existing documents and compares with the DTD they use? [I can think of other possible uses for such a tool, so I thought someone might have invented it.]

Christopher Brewster

[Charles]

The folks who built Saxon have a DTD generator (http://saxon.sourceforge.net/dtdgen.html) that might do the trick.