def get_pandoc_formats():
    """
    Dynamic preprocessor for Pandoc formats.
    Return 2 lists. "from_formats" and "to_formats".
    """
    from_formats = ['markdown', 'texttile', 'rst', 'html', 'docbook', 'latex']
    to_formats = ['markdown', 'rst', 'html', 'latex', 'context',
        'mediawiki', 'textile', 'org', 'texinfo', 'docbook', 'docx', 'epub',
        'mobi', 'asciidoc', 'rtf']
    return from_formats, to_formats
