<xs:element name="a">
    <xs:complexType mixed="true">
        <xs:choice minOccurs="0" maxOccurs="unbounded">
            <xs:element ref="xhtml:br" />
            <xs:element ref="xhtml:span" />
            <xs:element ref="xhtml:em" />
            <xs:element ref="xhtml:strong" />
            <xs:element ref="xhtml:dfn" />
            <xs:element ref="xhtml:code" />
            <xs:element ref="xhtml:samp" />
            <xs:element ref="xhtml:kbd" />
            <xs:element ref="xhtml:var" />
            <xs:element ref="xhtml:cite" />
            <xs:element ref="xhtml:abbr" />
            <xs:element ref="xhtml:acronym" />
            <xs:element ref="xhtml:q" />
            <xs:element ref="xhtml:b" />
            <xs:element ref="xhtml:big" />
            <xs:element ref="xhtml:i" />
            <xs:element ref="xhtml:small" />
            <xs:element ref="xhtml:sub" />
            <xs:element ref="xhtml:sup" />
            <xs:element ref="xhtml:tt" />
            <xs:element ref="pam:media" />
            <xs:element ref="pim:timePeriod" />
        </xs:choice>
        <xs:attribute name="id" type="xs:ID" />
        <xs:attribute name="title" type="xs:string" />
        <xs:attribute name="dir">
            <xs:simpleType>
                <xs:restriction base="xs:NMTOKEN">
                    <xs:enumeration value="ltr" />
                    <xs:enumeration value="rtl" />
                </xs:restriction>
            </xs:simpleType>
        </xs:attribute>
        <xs:attribute ref="xml:lang" />
        <xs:attribute name="href" type="xs:string" />
        <xs:attribute name="charset" type="xs:string" />
        <xs:attribute name="type" type="xs:string" />
        <xs:attribute name="hreflang" type="xs:NMTOKEN" />
        <xs:attribute name="rel" type="xs:NMTOKENS" />
        <xs:attribute name="rev" type="xs:NMTOKENS" />
        <xs:attribute name="accesskey" type="xs:string" />
        <xs:attribute name="tabindex" type="xs:string" />
    </xs:complexType>
</xs:element>