<xsd:element name="protocol" minOccurs="1" maxOccurs="1">
    <xsd:annotation>
        <xsd:documentation>This element specifies the type of listening port.  It is restricted to either TCP or UDP.</xsd:documentation>
        <xsd:appinfo>
            <parent_test>Port Test</parent_test>
            <cardinality>1</cardinality>
            <content>string</content>
            <valid_datatypes>string</valid_datatypes>
            <valid_operators>equals, not equal</valid_operators>
        </xsd:appinfo>
    </xsd:annotation>
    <xsd:complexType>
        <xsd:simpleContent>
            <xsd:restriction base="oval_results:subtestStringType">
                <xsd:enumeration value="TCP" />
                <xsd:enumeration value="UDP" />
            </xsd:restriction>
        </xsd:simpleContent>
    </xsd:complexType>
</xsd:element>

• oval_results:subtestStringType
  • protocol