~ LanguageStem follows rfc4647

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@@ -958,7 +958,7 @@ <h4>Values Constraint</h4>
           <ul>
             <li><span class="math">s</span> is a <span class="jobjref"><a class="obj">IriStem</a></span> and <span class="math">n</span> is an <a>IRI</a> and <span class="math function" ><a data-cite="xpath-functions-31#func-starts-with">fn:starts-with</a>(n, st)</span>.</li>
             <li><span class="math">s</span> is a <span class="jobjref"><a class="obj">LiteralStem</a></span> and <span class="math">n</span> is an <a>RDF Literal</a> with a lexical value <span class="math">l</span> and <span class="math function" ><a data-cite="xpath-functions-31#func-starts-with">fn:starts-with</a>(l, st)</span>.</li>
-            <li><span class="math">s</span> is a <span class="jobjref"><a class="obj">LanguageStem</a></span> and <span class="math">n</span> is a <a>language-tagged string</a> with a <a>language tag</a> <span class="math">l</span> and <span class="math function" ><a data-cite="xpath-functions-31#func-starts-with">fn:starts-with</a>(l, st)</span>.</li>
+            <li><span class="math">s</span> is a <span class="jobjref"><a class="obj">LanguageStem</a></span>, <span class="math">n</span> is a <a>language-tagged string</a> with a <a>language tag</a> <span class="math">l</span>, <span class="math">st</span> is a basic language range  per <a class="norm" href="http://www.ietf.org/rfc/rfc4647.txt">Matching of Language Tags</a> [[!rfc4647]] section 2.1 and <span class="math">l</span> matches <span class="math">st</span> per the basic filtering scheme defined in [[!rfc4647]] section 3.3.1.</li>
             <li><span class="math">n</span> is a <a>blank node</a> with identifier <span class="math">l</span> and <span class="math function" ><a data-cite="xpath-functions-31#func-starts-with">fn:starts-with</a>(l, st)</span>.</li>
           </ul></li>
         </ul>