<xsd:simpleType name="TelephoneExtension">
    <xsd:annotation>
        <xsd:documentation source="Description">Extension to reach a specific party at the phone number</xsd:documentation>
        <xsd:documentation source="Implementer">Assigned XSD Type: {http://www.w3.org/2001/XMLSchema}string</xsd:documentation>
        <xsd:appinfo>
            <otm:OTA2Entity type="Simple" xmlns:otm="http://www.OpenTravel.org/ns/OTA2/AppInfo_v01_00">TelephoneExtension</otm:OTA2Entity>
            <otm:Equivalent context="Common" xmlns:otm="http://www.OpenTravel.org/ns/OTA2/AppInfo_v01_00">NumericStringLength1to5</otm:Equivalent>
            <otm:Example context="Common" xmlns:otm="http://www.OpenTravel.org/ns/OTA2/AppInfo_v01_00">237</otm:Example>
        </xsd:appinfo>
    </xsd:annotation>
    <xsd:restriction base="xsd:string">
        <xsd:pattern value="[0-9]{1,5}" />
    </xsd:restriction>
</xsd:simpleType>

• TelephoneExtension
• ota2-0400:extension