Validation of XML data against an EXPRESS schema using XSLT translation to part 21 format

This paper describes an approach for validating XML data that are governed by an ISO 10303-11 EXPRESS schema. The approach relies on transformation from XML to a temporary file in ISO 10303-21 format. The approach does not require tailoring the transformation script to a particular EXPRESS schema, so long as one follows a regular pattern when mapping the EXPRESS schema to XML. The original motivation for this work was the EXPRESS schemata defined in the IEEE AI-ESTATE standard, but the approach should work for other schemata as well.