
  CONST
    amc$block_number = 1,
    amc$current_byte_address = 2,
    amc$duplicate_value_inserted = 3,
    amc$eoi_byte_address = 4,
    amc$error_count = 5, {Supported only for indexed_sequential files}
    amc$error_status = 6,
    amc$file_position = 7,
    amc$last_access_operation = 8,
    amc$last_op_status = 9,
    amc$levels_of_indexing = 10, {Supported only for indexed_sequential files}
    amc$null_item = 11,
    amc$number_of_nested_files = 12,
    amc$number_of_volumes = 13,
    amc$previous_record_address = 14,
    amc$previous_record_length = 15,
    amc$primary_key = 16,
    amc$residual_skip_count = 17,
    amc$selected_key_name = 18,
    amc$selected_nested_file = 19,
    amc$tape_failure_isolation = 20,
    amc$volume_description = 21,
    amc$volume_number = 22,
    amc$volume_position = 23,
    amc$lock_file_residence = 24,
    amc$altered_not_closed = 25,
    amc$segment_count = 26,
    amc$segment_information = 27,
    amc$size_in_blocks = 28,
    amc$physical_volume_position = 29,
    amc$tape_element_name = 30,
{}
    amc$max_info = 01ff(16);

  TYPE
    amt$access_info_keys = 1 .. amc$max_info;

