{
{   The purpose of this request is to retrieve the value of one or
{ more file attributes subsequent to the file being opened.  This
{ request is similar to amp$get_file_attributes except the file_identifier
{ is used to distinguish from among what may be several instances
{ of open of the same file.
{
{       AMP$FETCH (FILE_IDENTIFIER, FILE_ATTRIBUTES, STATUS)
{
{ FILE_IDENTIFIER: (input) This parameter specifies the file access
{       identifier established when the file was opened.
{
{ FILE_ATTRIBUTES: (input-output) This parameter specifies one or more
{       attributes whose value is sought.
{
{ STATUS: (output) This parameter specifies the request status.
{       CONDITION:  ame$ring_validation_error,
{                   ame$improper_file_attrib_key,
{                   ame$improper_file_id.
{       IDENTIFIER: amc$access_method_id.
{
