A language for marking up information, usually used for interchange between programs and for FileFormats. It differs from a ProgrammingLanguage in that it is not TuringComplete?.

RTF, SGML, XML are MarkupLanguages, while C, Java, and PostScript are ProgrammingLanguages.

lib/main.php:944: Notice: PageInfo: Cannot find action page

lib/main.php:839: Notice: PageInfo: Unknown action