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.

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