> IMHO this was not necessary. We have only internal entities. From the > DocBook - The Definitiv Guide on page 610 or online in the Glossary: > > external entity > An external entity is a general entity that refers to another document. > Externals entities are often used to incorporate parsable text > documents, like legal notices or chapters, into larger units, like > chapters or books. And errm, well, this external entity definition is all right, as we are using the separate files (like the ones in the chapters directory) to incorporate those documents into a larger unit as it can be seen in manual.xml (or manual.xml.in). Manual.xml is actually defines a <book>, and the files are the chapters, references, etc... Goba