<literal>point[1]</literal>.
    Note that
    this facility only works for fixed-length types whose internal form
    is exactly a sequence of identical fixed-length fields.
    For historical reasons (i.e., this is clearly wrong but it's far too
    late to change it), subscripting of fixed-length array types starts from
    zero, rather than from one as for variable-length arrays.
   </para>

   <para>
    Specifying the <option>SUBSCRIPT</option> option allows a data type to
    be subscripted, even though the system does not otherwise regard it as
    an array type.  The behavior just described for fixed-length arrays is
    actually implemented by the <option>SUBSCRIPT</option> handler
    function <function>raw_array_subscript_handler</function>, which is
    used automatically if you specify <option>ELEMENT</option> for a
    fixed-length type without also writing <option>SUBSCRIPT</option>.
   </para>

   <para>
    When specifying a custom <option>SUBSCRIPT</option> function, it is
    not necessary to specify <option>ELEMENT</option> unless
    the <option>SUBSCRIPT</option> handler function needs to
    consult <structfield>typelem</structfield> to find out what to return.
    Be aware that specifying <option>ELEMENT</option> causes the system to
    assume that the new type contains, or is somehow physically dependent on,
    the element type; thus for example changing properties of the element
    type won't be allowed if there are any columns of the dependent type.
   </para>
  </refsect2>
 </refsect1>

 <refsect1>
  <title>Parameters</title>

  <variablelist>
   <varlistentry>
    <term><replaceable class="parameter">name</replaceable></term>
    <listitem>
     <para>
      The name (optionally schema-qualified) of a type to be created.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">attribute_name</replaceable></term>
    <listitem>
     <para>
      The name of an attribute (column) for the composite type.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">data_type</replaceable></term>
    <listitem>
     <para>
      The name of an existing data type to become a column of the
      composite type.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">collation</replaceable></term>
    <listitem>
     <para>
      The name of an existing collation to be associated with a column of
      a composite type, or with a range type.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">label</replaceable></term>
    <listitem>
     <para>
      A string literal representing the textual label associated with
      one value of an enum type.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">subtype</replaceable></term>
    <listitem>
     <para>
      The name of the element type that the range type will represent ranges
      of.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">subtype_operator_class</replaceable></term>
    <listitem>
     <para>
      The name of a b-tree operator class for the subtype.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">canonical_function</replaceable></term>
    <listitem>
     <para>
      The name of the canonicalization function for the range type.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">subtype_diff_function</replaceable></term>
    <listitem>
     <para>
      The name of a difference function for the subtype.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">multirange_type_name</replaceable></term>
    <listitem>
     <para>
      The name of the corresponding