Document Analysis, Modelling, and Markup  

Standard Generalized Markup Language (SGML) is an ISO standard for document publishing. SGML allows you to port your documentation from one plagorm to another easily. Another benefit is that SGML lets you write the information one time and use it in many places. After planning your SGML implementation, the first step in your implementation is to create a Document Type Definition( DTD). In order to create a DTD, you must complete several steps: identify project parameters, analyze your documents, model your document, convert your model to DTD mark up, and test your DTD.

Dimick, Sharlyn A. and Lori A. Stertzbach. STC Proceedings (1997). Articles>Information Design>SGML