code: StringVector processSTRINGLIST(StylesheetHandler handler, String uri,
                                   String name, String rawName, String value)
    {
  
      StringTokenizer tokenizer = new StringTokenizer(value, " \t\n\r\f");
      int nStrings = tokenizer.countTokens();
      StringVector strings = new StringVector(nStrings);
  
      for (int i = 0; i < nStrings; i++)
      {
        strings.addElement(tokenizer.nextToken());
      }
  
      return strings;
    }
docs: Process an attribute string of type T_STRINGLIST into
  a vector of XPath match patterns.
  
  @param handler non-null reference to current StylesheetHandler that is constructing the Templates.
  @param uri The Namespace URI, or an empty string.
  @param name The local name (without prefix), or empty string if not namespace processing.
  @param rawName The qualified name (with prefix).
  @param value a whitespace delimited list of string values.
  
  @return A StringVector of the tokenized strings.