/** Parse Definition Attributes for a LDAP matching rule */
  static LDAPMatchingRuleSchema parseDefAttributes(Attributes attrs) throws NamingException {
    String name = null, oid = null, desc = null, syntax = null;
    boolean obsolete = false;
    Vector applies = new Vector();

    for (Enumeration attrEnum = attrs.getAll(); attrEnum.hasMoreElements(); ) {
      Attribute attr = (Attribute) attrEnum.nextElement();
      String attrName = attr.getID();
      if (attrName.equals(NAME)) {
        name = getSchemaAttrValue(attr);
      } else if (attrName.equals(NUMERICOID)) {
        oid = getSchemaAttrValue(attr);
      } else if (attrName.equals(SYNTAX)) {
        syntax = getSchemaAttrValue(attr);
      } else if (attrName.equals(DESC)) {
        desc = getSchemaAttrValue(attr);
      } else if (attrName.equals(APPLIES)) {
        for (Enumeration valEnum = attr.getAll(); valEnum.hasMoreElements(); ) {
          applies.addElement((String) valEnum.nextElement());
        }
      } else if (attrName.equals(OBSOLETE)) {
        obsolete = parseTrueFalseValue(attr);
      } else {
        throw new NamingException(
            "Invalid schema attribute type for matching rule definition " + attrName);
      }
    }

    LDAPMatchingRuleSchema mrule =
        new LDAPMatchingRuleSchema(name, oid, desc, vectorToStringAry(applies), syntax);

    if (obsolete) {
      mrule.setQualifier(OBSOLETE, "");
    }
    return mrule;
  }