I would not expect grammar-driven editors to be able to use the pattern to guide authoring but to always be able to use the enumeration.

Cheers,

E.

Hi Folks,

Below are two XML Schema element declarations. Both enumerate a set of values for the <type> element. The first uses the pattern facet to enumerate the set of values. The second uses the enumeration facet. Is there a reason to prefer one over the other? Or, are they identical for all practical purposes?  /Roger

<xs:element name="type">
    <xs:simpleType>
        <xs:restriction base="xs:string">
            <xs:pattern value="contact|acquaintance|friend|met|co\-worker|colleague|co\-resident|neighbor|child|parent|sibling|spouse|kin|muse|crush|date|sweetheart|me|agent|emergency" />
        </xs:restriction>
    </xs:simpleType>
</xs:element>

<xs:element name="type">
    <xs:simpleType>
        <xs:restriction base="xs:string">
            <xs:enumeration value="contact" />
            <xs:enumeration value="acquaintance" />
            <xs:enumeration value="friend" />
            <xs:enumeration value="met" />
            <xs:enumeration value="co-worker" />
            <xs:enumeration value="colleague" />
            <xs:enumeration value="co-resident" />
            <xs:enumeration value="neighbor" />
            <xs:enumeration value="child" />
            <xs:enumeration value="parent" />
            <xs:enumeration value="sibling" />
            <xs:enumeration value="spouse" />
            <xs:enumeration value="kin" />
            <xs:enumeration value="muse" />
            <xs:enumeration value="crush" />
            <xs:enumeration value="date" />
            <xs:enumeration value="sweetheart" />
            <xs:enumeration value="me" />
            <xs:enumeration value="agent" />
            <xs:enumeration value="emergency" />
        </xs:restriction>
    </xs:simpleType>
</xs:element>