Sgml

Indicates the default generalized markup language. SGML is a markup language used to define the structure of a document. SGML is not often mentioned, but it is a markup language that serves as the basis for XML and HTML.

Indicates the default generalized markup language. It is a markup language used to define the structure of a document. SGML is not often mentioned, but it is a markup language that serves as the basis for XML and HTML.