These examples are not exhaustive—they do not contain all the elements that might be desirable to use, particularly in a document's front matter. For more examples of DocBook markup, examine the XML source for this and other documents available in the Subversion doc repository, or available online starting at http://svnweb.FreeBSD.org/doc/. <!DOCTYPE book PUBLIC "-//FreeBSD//DTD DocBook XML V5.0-Based Extension//EN" "http://www.FreeBSD.org/XML/share/xml/freebsd50.dtd"> book xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0" xml:lang="en" info titleAn Example Booktitle author personname firstnameYour first namefirstname surnameYour surnamesurname personname affiliation address emailfoo@example.comemail address affiliation author copyright year2000year holderCopyright string hereholder copyright abstract paraIf your book has an abstract then it should go here.para abstract info preface titlePrefacetitle paraYour book may have a preface, in which case it should be placed here.para preface chapter titleMy First Chaptertitle paraThis is the first chapter in my book.para sect1 titleMy First Sectiontitle paraThis is the first section in my book.para sect1 chapter book <!DOCTYPE article PUBLIC "-//FreeBSD//DTD DocBook XML V5.0-Based Extension//EN" "http://www.FreeBSD.org/XML/share/xml/freebsd50.dtd"> article xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0" xml:lang="en" info titleAn Example Articletitle author personname firstnameYour first namefirstname surnameYour surnamesurname personname affiliation address emailfoo@example.comemail address affiliation author copyright year2000year holderCopyright string hereholder copyright abstract paraIf your article has an abstract then it should go here.para abstract info sect1 titleMy First Sectiontitle paraThis is the first section in my article.para sect2 titleMy First Sub-Sectiontitle paraThis is the first sub-section in my article.para sect2 sect1 article