<xsd:element name="source">
    <xsd:complexType mixed="true">
        <xsd:group maxOccurs="unbounded" minOccurs="0" ref="xlf:ElemGroup_TextContent" />
        <xsd:attribute ref="xml:lang" use="optional" />
        <xsd:anyAttribute namespace="##other" processContents="strict" />
    </xsd:complexType>
    <xsd:unique name="U_source_bpt_rid">
        <xsd:selector xpath=".//xlf:bpt" />
        <xsd:field xpath="@rid" />
    </xsd:unique>
    <xsd:keyref name="KR_source_ept_rid" refer="xlf:U_source_bpt_rid">
        <xsd:selector xpath=".//xlf:ept" />
        <xsd:field xpath="@rid" />
    </xsd:keyref>
    <xsd:unique name="U_source_bx_rid">
        <xsd:selector xpath=".//xlf:bx" />
        <xsd:field xpath="@rid" />
    </xsd:unique>
    <xsd:keyref name="KR_source_ex_rid" refer="xlf:U_source_bx_rid">
        <xsd:selector xpath=".//xlf:ex" />
        <xsd:field xpath="@rid" />
    </xsd:keyref>
</xsd:element>