9.2. FreeBSD Extensions
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## 9.2. FreeBSD Extensions

The FreeBSD Documentation Project has extended the DocBook DTD by adding some new elements. These elements serve to make some of the markup more precise.

Where a FreeBSD-specific element is listed below, it is clearly marked.

Throughout the rest of this document, the term “DocBook” is used to mean the FreeBSD-extended DocBook DTD.

### Note:

There is nothing about these extensions that is FreeBSD specific, it was just felt that they were useful enhancements for this particular project. Should anyone from any of the other *nix camps (NetBSD, OpenBSD, Linux, …) be interested in collaborating on a standard DocBook extension set, please get in touch with Documentation Engineering Team `<doceng@FreeBSD.org>`.

The FreeBSD extensions are not (currently) in the Ports Collection. They are stored in the FreeBSD Subversion tree, as head/share/xml/freebsd.dtd.

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All FreeBSD documents are available for download at http://ftp.FreeBSD.org/pub/FreeBSD/doc/

Questions that are not answered by the documentation may be sent to <freebsd-questions@FreeBSD.org>.
Send questions about this document to <freebsd-doc@FreeBSD.org>.