Antenna House is pleased to announce the availability of 'focheck' as an add-on oXygen framework for validating XSL-FO and Antenna House extensions. 'focheck' bundles a Relax NG schema and a Schematron grammar in an oXygen framework for detailed validation of XSL-FO within oXygen XML Editor. You can, of course, also use the 'focheck' Relax NG and Schematron outside of oXygen, either together or separately. The Relax NG handles structural validation and the Schematron handles the additional constraints that cannot be expressed in Relax NG. The Schematron parses property value expressions using an XSLT-based parser generated by the REx parser generator plus an XSLT library for reducing the parse tree to XSL-FO datatypes. 'focheck' is available on GitHub at https://github.com/AntennaHouse/focheck. If you want to go straight to installing it as an add-on, the Update Site URL to use is https://github.com/AntennaHouse/focheck/raw/master/add-on.xml 'focheck' is a work in progress. It does not (yet) handle every XSL-FO property or every requirement in the XSL-FO spec, nor does it evaluate either functions or relative lengths. Pull requests and new issues are welcome. I will also be talking about 'focheck' at XML London 2015 in June. [1] And, of course, thanks go to the folks at Oxygen XML Editor Support for helping with some of the issues encountered. 'focheck' is open source licensed under the Apache License, Version 2.0. Regards, Tony Graham. -- Senior Architect XML Division Antenna House, Inc. ---- Skerries, Ireland tgraham@antenna.co.jp [1] http://xmllondon.com/programme#Tony-Graham