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    1   /*
    2    * Copyright (c) 2004 World Wide Web Consortium,
    3    *
    4    * (Massachusetts Institute of Technology, European Research Consortium for
    5    * Informatics and Mathematics, Keio University). All Rights Reserved. This
    6    * work is distributed under the W3C(r) Software License [1] in the hope that
    7    * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
    8    * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    9    *
   10    * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
   11    */
   12   
   13   package org.w3c.dom;
   14   
   15   /**
   16    *  The <code>DOMImplementationList</code> interface provides the abstraction 
   17    * of an ordered collection of DOM implementations, without defining or 
   18    * constraining how this collection is implemented. The items in the 
   19    * <code>DOMImplementationList</code> are accessible via an integral index, 
   20    * starting from 0. 
   21    * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document Object Model (DOM) Level 3 Core Specification</a>.
   22    * @since DOM Level 3
   23    */
   24   public interface DOMImplementationList {
   25       /**
   26        *  Returns the <code>index</code>th item in the collection. If 
   27        * <code>index</code> is greater than or equal to the number of 
   28        * <code>DOMImplementation</code>s in the list, this returns 
   29        * <code>null</code>. 
   30        * @param index Index into the collection.
   31        * @return  The <code>DOMImplementation</code> at the <code>index</code>
   32        *   th position in the <code>DOMImplementationList</code>, or 
   33        *   <code>null</code> if that is not a valid index. 
   34        */
   35       public DOMImplementation item(int index);
   36   
   37       /**
   38        *  The number of <code>DOMImplementation</code>s in the list. The range 
   39        * of valid child node indices is 0 to <code>length-1</code> inclusive. 
   40        */
   41       public int getLength();
   42   
   43   }

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