SGML stands for stands for standard generalized markup language. SGML is a meta language in which one can define markup language for documents.
Markup:
Markup language means a set of conventions used together for encoding texts. It must specify what effect is allowed, what is required and how style or effect is to be distinguished for text.
Need for SGML :
SGML was orginally designed to enable the sharing of machine readble documents in large products in Government legal and aerspace industry.
It is primarly used for text and database publishing.
Example :
Oxford English dictionary which was marked up completely in SGML.
SGML has no predefined tags of its own user can create tags of their own.
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