Because SGML markup is done with text
tags, you can create SGML documents using any plain-text editor. Documents consist of the text of
your document and tags that identify each type of information in the text.
RGB or Palette color
TIFF image
Type 1 PostScript font
(binary MS-DOS)
574
Running Applications Part IV
Unlike markup languages such as Groff and TeX, SGML markup is not intended to enforce a particular
look when you are creating the document. So, for example, instead of marking a piece of
text as being bold or italic, you would identify it as an address, a paragraph, or a name. Later, a
style sheet would be applied to the document to assign a look and presentation to the tagged text.
HTML is an example of SGML markup.
Because SGML consists of many tags, other projects have cropped up to simplify producing
documents based on SGML and to better focus the ways in which SGML is used. In particular, the
Extensible Markup Language (XML) was created to offer a manageable subset of SGML that would
be specifically tailored to work well with Web-based publishing.
So far in this description of SGML and XML, I??™ve discussed only the frameworks that are used to
produce structured documents. Specific documentation projects need to create and, to some extent,
enforce specific markup definitions for the type of documents they need to produce.
Pages:
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087