Home >Online Product Documentation >Table of Contents >Constraint Element Type Properties in XML Schemas < Previous| Next > Constraint Element Type Properties in XML Schemas Constraint Element types have the properties described in Table 85. See Adding an Identity Constraint to an Element for more information. Table 85. Constraint Element Type Properties Property Description Type The type is always Constraint Element. XPath Expression An XPath expression that returns the element for which you are defining a constraint. < Previous| Next >