config BR2_PACKAGE_DOCBOOK_XML bool "docbook-xml" help Document type definitions for verification of XML data files against the DocBook rule set, it ships with the latest DocBook 4.5 XML DTD, as well as a selected set of legacy DTDs for use with older documents, including 4.0, 4.1.2, 4.2, 4.3 and 4.4 http://www.docbook.org/xml/