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-DocBook XML [DEPRECATED]
-========================
-
-.. attention::
-
- This section describes the deprecated DocBook XML toolchain. Please do not
- create new DocBook XML template files. Please consider converting existing
- DocBook XML templates files to Sphinx/reStructuredText.
-
-Converting DocBook to Sphinx
-----------------------------
-
-Over time, we expect all of the documents under ``Documentation/DocBook`` to be
-converted to Sphinx and reStructuredText. For most DocBook XML documents, a good
-enough solution is to use the simple ``Documentation/sphinx/tmplcvt`` script,
-which uses ``pandoc`` under the hood. For example::
-
- $ cd Documentation/sphinx
- $ ./tmplcvt ../DocBook/in.tmpl ../out.rst
-
-Then edit the resulting rst files to fix any remaining issues, and add the
-document in the ``toctree`` in ``Documentation/index.rst``.
-
-Components of the kernel-doc system
------------------------------------
-
-Many places in the source tree have extractable documentation in the form of
-block comments above functions. The components of this system are:
-
-- ``scripts/kernel-doc``
-
- This is a perl script that hunts for the block comments and can mark them up
- directly into reStructuredText, DocBook, man, text, and HTML. (No, not
- texinfo.)
-
-- ``Documentation/DocBook/*.tmpl``
-
- These are XML template files, which are normal XML files with special
- place-holders for where the extracted documentation should go.
-
-- ``scripts/docproc.c``
-
- This is a program for converting XML template files into XML files. When a
- file is referenced it is searched for symbols exported (EXPORT_SYMBOL), to be
- able to distinguish between internal and external functions.
-
- It invokes kernel-doc, giving it the list of functions that are to be
- documented.
-
- Additionally it is used to scan the XML template files to locate all the files
- referenced herein. This is used to generate dependency information as used by
- make.
-
-- ``Makefile``
-
- The targets 'xmldocs', 'psdocs', 'pdfdocs', and 'htmldocs' are used to build
- DocBook XML files, PostScript files, PDF files, and html files in
- Documentation/DocBook. The older target 'sgmldocs' is equivalent to 'xmldocs'.
-
-- ``Documentation/DocBook/Makefile``
-
- This is where C files are associated with SGML templates.
-
-How to use kernel-doc comments in DocBook XML template files
-------------------------------------------------------------
-
-DocBook XML template files (\*.tmpl) are like normal XML files, except that they
-can contain escape sequences where extracted documentation should be inserted.
-
-``!E<filename>`` is replaced by the documentation, in ``<filename>``, for
-functions that are exported using ``EXPORT_SYMBOL``: the function list is
-collected from files listed in ``Documentation/DocBook/Makefile``.
-
-``!I<filename>`` is replaced by the documentation for functions that are **not**
-exported using ``EXPORT_SYMBOL``.
-
-``!D<filename>`` is used to name additional files to search for functions
-exported using ``EXPORT_SYMBOL``.
-
-``!F<filename> <function [functions...]>`` is replaced by the documentation, in
-``<filename>``, for the functions listed.
-
-``!P<filename> <section title>`` is replaced by the contents of the ``DOC:``
-section titled ``<section title>`` from ``<filename>``. Spaces are allowed in
-``<section title>``; do not quote the ``<section title>``.
-
-``!C<filename>`` is replaced by nothing, but makes the tools check that all DOC:
-sections and documented functions, symbols, etc. are used. This makes sense to
-use when you use ``!F`` or ``!P`` only and want to verify that all documentation
-is included.