In http://forrest.apache.org/docs/validation.html it says The document-v13 entities are defined in a reusable 'module': forrest/src/core/context/resources/schema/dtd/document-v13.mod The forrest/src/core/context/resources/schema/dtd/document-v13.dtd file provides a full description and basic example of how to pull in modules. In our example, our DTD reuses modules common-charents-v10.mod and document-v13.mod. Here is the full DTD, with explanation to follow. Yet in my checked out source tree I have found no such dir. Does this path refer to the packeged version of forrest. And if so is %forrest%\main\webapp\resources\schema\dtd\document-v13.dtd the correct file to look at? Would it make sense to add this as a note to the document? Cheers, Ferdinand Soethe