markup-language As a command 10 categories below markup-language Narrow by file-format 4 data-serialization-format 3 geographic-data-format 2 xml 2 authentication-protocol 1 communications-protocol 1 image-file-format 1 xml 2gps-exchange-formathtmlkeyhole-markup-languagelatexmarkdownrestructuredtextsamlstandard-generalized-markup-languagesvg