SGML meaning in Information Technology ?

Answer: What is Standard Generalized Markup Language mean?

The Standard Generalized Markup Language (SGML; ISO 8879:1986) is a standard for defining generalized markup languages for documents. ISO 8879 Annex A.1 states that generalized markup is "based on two postulates":

Declarative: Markup should describe a document's structure and other attributes rather than specify the processing that needs to be performed, because it is less likely to conflict with future developments.Rigorous: In order to allow markup to take advantage of the techniques available for processing markup should rigorously define objects like programs and databases.

DocBook SGML and LinuxDoc are examples which were used almost exclusively with actual SGML tools.

reference

Full Form	Category
System Generalized Markup Language	Academic & Science
Standard Generalized Markup Language Document	File Type
The Standard Generalized Markup Langua	General
Standard Generalized Markup Language	Information Technology
Sounds Great, Maybe Later	Messaging