Schematron Schematron is a Schematron schema that checks XPath expressions in your Schematron. It uses parsers for XPath 2.0 or XPath 3.1 depeding on the @queryBinding attribute to check the syntax of XPath expressions.
It checks the following attributes:
sch:assert/@testsch:let/@valuesch:path/@namesch:pattern/@documentssch:report/@testsch:rule/@contextsch:value-of/@namexsl:copy-of/@select
Starting with version 1.1 it also performs a static analysis of the expression and warns about the following potential problems:
- QNames with prefixes that are not declared by a
sch:nselement - function in the null namespaces that are not defined by the XPath function and operator specifications
The idea of Schematron Schematron was conceived during the TEI 2022 Conference in a discussion with Martin Holmes.
Note Schematron Schematron relies on a Schematron processor that supports the xsl:include element. This is
non-conformant behaviour but supported by both, the Skeleton and
SchXslt.
Note Contrary to the specification it uses xslt2 as default value when no @queryBinding is defined. You can override
the default value by passing the parameter queryBinding to the validation stylesheet.
Schematron Schematron is copyright (c) by David Maus <[email protected]> and released under the terms of the MIT license.
The XPath 2.0 and XPath 3.1 parsers are generated by the REx Parser Generator by Gunther Rademacher and contain fragments of REx source code supplied under the Apache 2.0 license.
The function and operator libraries where extract from the respective documents, the XPath 2.0 specification, the XPath 3.1 function catalog, the XSLT 3.0 specification, and the XSLT 2.0 specification.
David Maus <[email protected]>
Kosek, Jirka. 2017. “Improving Validation of Structured Text.” In XML London 2017 Conference Proceedings, 56–67. London, United Kingdom: XML London. https://doi.org/10.14337/XMLLondon17.Kosek01.