The TEXbook
The Z notation: a reference manual
The Z notation: a reference manual
Comparative analysis of six XML schema languages
ACM SIGMOD Record
X-ray: towards integrating XML and relational database systems
ER'00 Proceedings of the 19th international conference on Conceptual modeling
Automatic Construction of XML-Based Tools Seen as Meta-Programming
Automated Software Engineering
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Designing and implementing modeling frontends for domains in which text is predominant (it may be informal, semi-formal or formal) can and should benefit from using the evolving standard markup languages (SMGML and XML), since standardization of interfaces, transmission and storage protocols as well as many valuable tools "come for free".But the idiosyncratics of the existing mark-up concepts neither provide a structure clean enough to serve as foundation for syntax and semantics of exact modeling frontends, nor do they offer an input format feasible for text-based data maintanance.Direct Document Denotation (DDD) as presented in this paper tries to remedy these defects: (1) it abstracts from the rough edges of XML, (2) it realizes a practical frontend processor for denotation of structured documents with special considerations to disabled users and voice controlled input, - and (3) is described completely and mathematically precise as a small system of transformation relations.The theoretical basics and practical issues of DDD are discussed and a case study is reported.