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module com {   module sun {   module star {   module rdf {

/** marks an object representing an ODF element that may have RDF meta data
    attached.

    <p>
    To make using ODF elements as part of RDF statements more convenient,
    this interface inherits from XURI.
    The URI is constructed by concatenating the URI of the document, the
    stream name, a fragment separator, and the XML ID.
    </p>

    <p>
    Note that using the XURI interface on an instance of
    XMetadatable may have the side effect of creating a metadata
    reference for the instance.
    </p>

    @since OOo 3.2

    @see XRepository
    @see XDocumentMetadataAccess
 */
interface XMetadatable : XURI
{
    /** a metadata reference, comprising the stream name and the XML ID.

        <p>
        Note that this metadata reference must be unique for the ODF document.
        This implies that the XML ID part must be unique for every stream.
        A pair of two empty strings signifies "no metadata reference".
        For example: Pair("content.xml", "foo-element-1")
        </p>

        @throws com::sun::star::lang::IllegalArgumentException
            if the given metadata reference is invalid, or not unique
     */
    [attribute] com::sun::star::beans::StringPair MetadataReference {
        set raises ( com::sun::star::lang::IllegalArgumentException );
    };

    /** creates a metadata reference for this object, if necessary.

        <p>
        If this object already has a metadata reference, do nothing;
        otherwise, create metadata reference with a fresh, unique XML ID
        and assign it to the MetadataReference attribute.
        </p>
     */
    void ensureMetadataReference();

};


}; }; }; };

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