Using datatypes

Adding an integer:
age=element age {xsd:integer}
Adding a date:
birthdate=element birthdate {xsd:date}
Social Security Number
ssn=element ssn{xsd:string {pattern = "\d{3}-\d{2}-\d{4}" } }
Can use facets, but not create new types All of the pre-defined types in W3C XML Schema Part 2: Datatypes are available, but there's no (current) mechanism for using user-defined types. You can, use the facets of the predefined types (as shown in ssn), but you can't derive types from derived types.