Hi, Is there a way to define constants in XML Schemas a reuse them in other places. I want to do something like this (look that in the "order" pattern I want to reuse de "vcdef" pattern): <simpleType name="vcdef"> <restriction base="string"> <pattern value="col=[\w\.]{0,8}"/> </restriction> </simpleType> <simpleType name="order"> <restriction base="string"> <pattern value="(\w{1,10})|(vcdef([,;]vcdef)*)"/> </restriction> </simpleType> Thank you. Federico. --------------------------------------------------------------------- In case of troubles, e-mail: [EMAIL PROTECTED] To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]