This repository contains the XML Checker Framework (XCF) which allows to check XML files according to certain defined constraints/rules.
The constraints are described in a custom XML format that allows to reuse them for other purposes.
The rules are written using Schematron, to allow the implementation of sophisticated checks of the related constraints and to detailed diagnostic data feedback.
A sample set of constraints/rules is contained in the
xcf_suite_sample repository.
Constraints/rules for TTML subtitles can be found in the
xcf_suite_ttml repository.
The repository xcf_web_app contains the XCF web app from BaseX that
allows to easily execute an XCF check in a browser window, resulting in
a visual presentation of the check results.
The files are described in more detail here.
This XSD restricts the constraints XML file of XCF.
This XSD restricts the report XML file that is used by XCF.
This XSD restricts the rules configuration XML file that is used by XCF.
This XSLT transforms the SVRL result of XCF into a custom XML representation which acts as "View Model" for other components (e.g. the XCF web app).
The result needs to be valid against the reportview.xsd.
This folder contains a customized Schematron-to-XSLT set of XSLT files that is used to transform the Schematron rules into a more convenient XSLT file. It is based on the Schematron reference implementation.
Only small parts have been changed (e.g. to bug fix known issues). Compared to the unmodified reference implementation, also the files targetting XSLT1 have been removed, as the fixes have only been implemented for the XSLT2 version.
The XSLTs in the customized Schematron-to-XSLT folder are used to
stepwise compile the rules.sch (not stored in this repo) to an XSLT
version. The required steps are all explained in the readme.txt of the
mentioned folder. The process also allows to skip certain steps if
specific features are not used.
For example a rules.sch file may have to be transformed only with the
iso_svrl_for_xslt2.xsl here in order to get the compiled XSLT rules.
Parts of the XCF were developed in the European collaborative research project HBB4ALL (Grant Agreement no 621014). This project has received funding from the European Union ICT Policy Support Programme (ICT PSP) under the Competitiveness and Innovation Framework Programme (CIP).
The XCF offered by Institut für Rundfunktechnik GmbH is subject to the MIT license.
In case the source code is modified and re-distributed we would welcome a short note (please email to open DOT source AT irt.de). This way we can keep track of opportunities to collaborate and to improve the project.