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The similarities between HTML 4.01 and XHTML 1.0 led many websites and content management systems to adopt the initial W3C XHTML 1.0 Recommendation. To aid authors in the transition, the W3C provided guidance on how to publish XHTML 1.0 documents in an HTML-compatible manner, and serve them to browsers that were not designed for XHTML. [28] [29]
XHTML5 is simply XML-serialized HTML5 data (that is, HTML5 constrained to XHTML's strict requirements, e.g., not having any unclosed tags), sent with one of XML media types. HTML that has been written to conform to both the HTML and XHTML specifications and therefore produces the same DOM tree whether parsed as HTML or XML is known as polyglot ...
Converters exist for TeX/LaTeX and XHTML+Mathml: Textile: 2002 [3] Dean Allen Text editor: Web browser (XHTML or HTML output), reference and tester (uses latest PHP-Textile version 3.5.5) Text Encoding Initiative (TEI) 1990 Text Encoding Initiative Consortium Text/XML editor: Web Browser (using XHTML), PDF, Word Processor (using ODF) or EPUB
Aside from the different opening declarations for a document, the differences between an HTML 4.01 and XHTML 1.0 document—in each of the corresponding DTDs—are largely syntactic. The underlying syntax of HTML allows many shortcuts that XHTML does not, such as elements with optional opening or closing tags, and even empty elements which must ...
A markup language, like HTML and less XUL, may define some primitive elements to style a document, for example <emphasis> to bold. CSS post styles a document to "screen media" or "paged media". Screen media, displayed as a single page (possibly with hyperlinks), that has a fixed horizontal width but a virtually unlimited vertical height.
Today, HTML5 provides a unified platform for creating websites that work across all devices, making XHTML Basic largely irrelevant in modern web development. One significant advantage of XHTML Basic over WML and C-HTML is that XHTML Basic pages can be rendered differently in web browsers and on handheld devices, eliminating the need for ...
The “very strange similarities” could be coincidental, McMahill said, but added “we’re not prepared to rule in or rule out anything,” noting the investigation is in an early stage.
RDFa was defined in 2008 with the "RDFa in XHTML: Syntax and Processing" Recommendation. [16] Its first application was to be a module of XHTML.. The HTML applications remained, "a collection of attributes and processing rules for extending XHTML to support RDF" expanded to HTML5, are now expressed in a specialized standard, the "HTML+RDFa" (the last is "HTML+RDFa 1.1 - Support for RDFa in ...