sgml The Standard Generalized Markup Language (ISO 8879:1986 SGML) is an ISO-standard technology for defining generalized markup languages for documents. ISO 8879 Annex A.1 defines generalized markup: Generalized markup is based on two novel postulates: 1) Markup should describe a document's structure and other attributes, rather than specify the processing to be performed on it, as descriptive markup needs to be done only once, and will suffice for future processing. 2) Markup should be rigorous so that the techniques available for processing rigorously-defined objects like programs and databases can be used for processing documents as well. (Excerpt from Wikipedia article: SGML) 56 270 3.3 http://www.ariadne.ac.uk/sites/all/datacharts/hc/1187-chart-wp.html