The following tables compare general and technical information for a number of document markup languages. Please see the individual markup languages' articles for further information.
^ Many markup languages have purposely avoided presentational markups. For markup languages based on SGML and XML, CSS is used as a presentation layer.
^ Presentational markup is deprecated as of XHTML 1.0 and no longer allowed as of XHTML 1.1
^ Presentational markup is deprecated as of HTML 4.0
^MathML comes in two mark-up syntaxes: a semantic and a presentational.
^ uses Content MathML, OpenMath or other formats for formulae
^ Exact presentation of symbols can be specified in OMDoc; these specifications are used when transforming OMDoc to a presentational format.