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Locating a schema

nXML mode has a configurable set of rules to locate a schema for the file being edited. The rules are contained in one or more schema locating files, which are XML documents.

The variable rng-schema-locating-files specifies the list of the file-names of schema locating files that nXML mode should use. The order of the list is significant: when file x occurs in the list before file y then rules from file x have precedence over rules from file y. A filename specified in rng-schema-locating-files may be relative. If so, it will be resolved relative to the document for which a schema is being located. It is not an error if relative file-names in rng-schema-locating-files do not not exist. You can use M-x customize-variable <RET> rng-schema-locating-files <RET> to customize the list of schema locating files.

By default, rng-schema-locating-files list has two members: schemas.xml, and dist-dir/schema/schemas.xml where dist-dir is the directory containing the nXML distribution. The first member will cause nXML mode to use a file schemas.xml in the same directory as the document being edited if such a file exist. The second member contains rules for the schemas that are included with the nXML distribution.