Hello, I undestand the choice tag allows one or the other element to be valid from an xml document. <xs:choice> <xsd:element name="full" Pricetype="fullPriceType"/> <xsd:element name="salePrice" type="salePriceType"/> </xs:choice> Code (markup): Is there a way to make a choice between having an element and having nothingif you understand what i mean. eg. <xs:choice> <xsd:element name="full" Pricetype="fullPriceType"/> "or no element at all" </xs:choice> Code (markup): or to substitute an element with no element using subtitution group attributes on a schema?? Thanks