"alesj" wrote : Is there a way to annotate your metadata to apply validation on attribute, e.g. the following regular expression: | | | <xsd:simpleType name="versionType"> | | <xsd:restriction base="xsd:token"> | | <xsd:pattern value="[0-9]+(\.[0-9]+)*"/> | | </xsd:restriction> | | </xsd:simpleType> | | No that is a job for schema validation not xml mapping. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4144891#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...