index_X

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x-height descriptor
XHTML 2nd
    authoring tools
    case sensitivity in style rule elements
    deciding to use
    documents in [See XHTML documents]
    DTDs
        deprecated elements, and
    HTML conversion software
    HTML vs.
    machine-generated content and
    tags, quick reference
    Version 1.0 and HTML 4.01
    Version 1.1
        elements to avoid
        modules
        ruby text
    well-formed documents and
    XML, using to define
XHTML documents
    content
        appearance vs.
        types of
    creating
        DTDs, declaring
        example document
    ending tags in
    nesting elements in
XML (Extensible Markup Language) 2nd 3rd
    DTDs
    as markup metalanguage
    special processing directives
    uses for
        connecting systems
        document exchange
        HTML, standardizing with
xmlns attribute, defining namespaces with
<xmp> tags