Scoping Element Contents with Context

• Multiple definitions for a role, different labels   

  <elementRule role="description" label="book-content">
     <sequence>
        <hedgeRef label="document_metadata" />
        <ref label="binding" />
     </sequence>
  </elementRule>
  <elementRule role="description" label="article=content">
     <sequence>
        <ref label="magazine" />
        <hedgeRef label="document_metadata" />
     </sequence>
  </elementRule>

• Applying multiple definitions   

  <elementRule role="magazineArticle">
     <sequence>
        <ref label="article-description" />
        <ref label="article-content" />
     </sequence>
  </elementRule>
  <elementRule role="book">
     <sequence>
        <ref label="book-description" />
        <ref label="book-content" />
     </sequence>
  </elementRule>
  

• Results    Both the magazineArticle element and the book element must now have a description element as their first child element, but the content types are different

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