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Posted by / 11-Sep-2020 12:25

Validating business requirements

This paper provides an introduction to Schematron; an innovative XML validation language developed by Rick Jelliffe.This innovation stems from selecting an alternative approach to validation than existing schema languages: Schematron uses a tree pattern based paradigm, rather than the regular grammars used in DTDs and XML schemas.As an extensible, easy to use, open source tool Schematron is an extremely useful addition to the XML developers toolkit.The initial section of this paper conducts a brief overview of tree pattern validation, and some of the advantages it has in comparison to a regular grammar approach.

While XML does include an ID/IDREF mechanism which allows for cross-referencing between elements, and hence another form of relationships, it only weakly binds those elements.The Schematron conformance language for custom implementation is also introduced.The paper completes with some suggestions of possible future extensions.This is followed by an outline of Schematron and the intended uses which have guided its design.The Schematron language is then discussed, covering all major elements in the language with examples of their usage.

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This paper introduces the Schematron language and the available implementations.