duplicate dcterms:date

Hi all,

    

    I'm getting duplicate dcterms:date in the epub3 package.opf

    

    <meta property="dcterms:date">2012</meta>

    <dc:date>2012</dc:date>

    <meta property="dcterms:date">2012</meta>

    <dc:date>2012</dc:date>

    

    The validator at http://validator.idpf.org/ gives me this.

    

    
      
        

          ERROR
          OEBPS/package.opf
          20
          14
          element "dc:date" not
            allowed here; expected the element end-tag or element
            "dc:contributor", "dc:coverage", "dc:creator",
            "dc:description", "dc:format", "dc:identifier",
            "dc:language", "dc:publisher", "dc:relation", "dc:rights",
            "dc:source", "dc:subject", "dc:title", "dc:type", "link" or
            "meta"
        

      
    
    

    I'm just wondering if anyone else is getting this or if it is a bug
    in my stylesheet.

    I'm using docbook-xsl-ns-1.78.1 stylesheets.

    

    Thanks,

    

    Peter