How do you dynamically customize the programming language available in a context within an existing system, without changing the underlying system? This dissertation introduces a language design approach that addresses this problem. The basic idea is to structure programs as systems of multiple interacting levels of abstraction, where all of the…

This paper has shown how XML (extensible Markup Language) can be used to mark up content. Since XML documents, with meaningful tags, can be interpreted easily by humans as well as computers, they are ideal for the interchange of information. Because XML tags can be defined by an individual or organization, XML documents have proven useful in a…

Describes the basics of Standard Generalized Markup Language (SGML), an international standard which separates structure and content of a document; states background information and objectives; presents an SGML document; discusses the movement from conventional documents to integrated document bases; defines hypermedia/time-based structuring…