dc_lang.xml

<!--
Description:  title value
Expect:       title_detail.language == 'en-us'
-->

<rdf:RDF
  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
  xmlns:dc="http://purl.org/dc/elements/1.1/"
  xmlns="http://purl.org/rss/1.0/">
<item>
  <title>foo</title>
  <dc:language>en-us</dc:language>
</item>
</rdf:RDF>