Dear All, Could any one help me on how to resolve the error, I pasted the error as an XML file below. I am validating the XML file using rules.sch file. -------------------- <?xml version="1.0" encoding="UTF-8"?> <report xmlns="http://www.oxygenxml.com/ns/report"> <incident> <engine>ISO Schematron (XSLT 2.0)</engine> <severity>error</severity> <description>Failed to compile stylesheet. 4 errors detected.</description> <systemID>C:\DATA\Rule-based validation\rules.sch</systemID> <operationDescription> <mainValidationFile>C:\DATA\sample.xml</mainValidationFile> </operationDescription> </incident> <incident> <engine>ISO Schematron (XSLT 2.0)</engine> <severity>fatal</severity> <description>The filtered expression in an XSLT 2.0 pattern must be a simple step</description> <systemID>C:\DATA\Rule-based validation\rules.sch</systemID> <operationDescription> <mainValidationFile>C:\DATA\sample.xml</mainValidationFile> </operationDescription> </incident> <incident> <engine>ISO Schematron (XSLT 2.0)</engine> <severity>fatal</severity> <description>The filtered expression in an XSLT 2.0 pattern must be a simple step</description> <systemID>C:\DATA\Rule-based validation\rules.sch</systemID> <operationDescription> <mainValidationFile>C:\DATA\sample.xml</mainValidationFile> </operationDescription> </incident> <incident> <engine>ISO Schematron (XSLT 2.0)</engine> <severity>fatal</severity> <description>The filtered expression in an XSLT 2.0 pattern must be a simple step</description> <systemID>C:\DATA\Rule-based validation\rules.sch</systemID> <operationDescription> <mainValidationFile>C:\DATA\sample.xml</mainValidationFile> </operationDescription> </incident> <incident> <engine>ISO Schematron (XSLT 2.0)</engine> <severity>fatal</severity> <description>The filtered expression in an XSLT 2.0 pattern must be a simple step</description> <systemID>C:\DATA\Rule-based validation\rules.sch</systemID> <operationDescription> <mainValidationFile>C:\DATA\sample.xml</mainValidationFile> </operationDescription> </incident> <incident> <engine>ISO Schematron (XSLT 2.0)</engine> <severity>fatal</severity> <description>Got a fatal error trying to create a transformer from the stylesheet!</description> <systemID>C:\DATA\sample.xml</systemID> <operationDescription> <mainValidationFile>C:\DATA\sample.xml</mainValidationFile> </operationDescription> </incident> </report> ------------- Regards Anantha