<structfield>object_type</structfield> <type>character_data</type>
      </para>
      <para>
       The type of the object that uses the array being described: one
       of <literal>TABLE</literal> (the array is used by a column of
       that table), <literal>USER-DEFINED TYPE</literal> (the array is
       used by an attribute of that composite type),
       <literal>DOMAIN</literal> (the array is used by that domain),
       <literal>ROUTINE</literal> (the array is used by a parameter or
       the return data type of that function).
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>collection_type_identifier</structfield> <type>sql_identifier</type>
      </para>
      <para>
       The identifier of the data type descriptor of the array being
       described.  Use this to join with the
       <literal>dtd_identifier</literal> columns of other information
       schema views.
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>data_type</structfield> <type>character_data</type>
      </para>
      <para>
       Data type of the array elements, if it is a built-in type, else
       <literal>USER-DEFINED</literal> (in that case, the type is
       identified in <literal>udt_name</literal> and associated
       columns).
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_maximum_length</structfield> <type>cardinal_number</type>
      </para>
      <para>
       Always null, since this information is not applied to array element data types in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_octet_length</structfield> <type>cardinal_number</type>
      </para>
      <para>
       Always null, since this information is not applied to array element data types in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_set_catalog</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Applies to a feature not available in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_set_schema</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Applies to a feature not available in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>character_set_name</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Applies to a feature not available in <productname>PostgreSQL</productname>
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>collation_catalog</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Name of the database containing the collation of the element
       type (always the current database), null if default or the data
       type of the element is not collatable
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>collation_schema</structfield> <type>sql_identifier</type>
      </para>
      <para>
       Name of the schema containing the collation of the element
       type, null if default or the data type of the element is not
       collatable
      </para></entry>
     </row>

     <row>
      <entry role="catalog_table_entry"><para role="column_definition">
       <structfield>collation_name</structfield>