<xs:simpleType name="EquipmentTypeCode"><xs:annotation><xs:appinfo>Equipment Type Code</xs:appinfo><xs:documentation>Pattern that represents Equipment Type Codes as defined by the Umler System used by AAR.</xs:documentation><xs:documentation>Relevant code examples (as defined by AAR): U (Container) Z (Trailer) Z1 (Chassis)</xs:documentation><xs:documentation>https://www.railinc.com/rportal/alf_docs/UmlerReference/UmlerDataSpecs.pdf</xs:documentation></xs:annotation><xs:restriction base="xs:string"><xs:pattern value="[UZ](\d{0,3})?"/><xs:maxLength value="4"/></xs:restriction></xs:simpleType>