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  <pre><span class="ruby-comment cmt"># File lib/eml.rb, line 67</span>
  <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">metadata</span>)
    <span class="ruby-keyword kw">if</span>(<span class="ruby-identifier">metadata</span>.<span class="ruby-identifier">class</span> <span class="ruby-operator">!=</span> <span class="ruby-constant">REXML</span><span class="ruby-operator">::</span><span class="ruby-constant">Document</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">metadata</span>.<span class="ruby-identifier">root</span>.<span class="ruby-identifier">name</span> <span class="ruby-operator">!=</span> <span class="ruby-value str">'eml'</span>)
      <span class="ruby-identifier">raise</span> <span class="ruby-constant">ArgumentError</span>, <span class="ruby-value str">'Must initialize with REXML::Document representation of EML metadata'</span>
    <span class="ruby-keyword kw">else</span>
      <span class="ruby-ivar">@doc</span> = <span class="ruby-identifier">metadata</span>
      <span class="ruby-ivar">@docid</span> = <span class="ruby-ivar">@doc</span>.<span class="ruby-identifier">root</span>.<span class="ruby-identifier">attributes</span>[<span class="ruby-value str">'packageId'</span>]
    <span class="ruby-keyword kw">end</span>
  <span class="ruby-keyword kw">end</span></pre>
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