FTAM/9000 Programmer's Guide

450 Glossary
Glossary
Data Element The smallest piece
of data whose identity is preserved
when transferred by the
Presentation Service. A data
element may convey file contents
information or protocol control
information.
Data Unit (DU) The file unit that
contains the actual file contents; a
data unit may contain file
structuring information or data
elements.
Document Type The
specification that defines the type
of file contents by specifying the
allowable constraint sets.
Empty File An FTAM file that
contains only a root node with no
associated data unit or node name.
Event The synchronous or
asynchronous invocation of an
FTAM function.
Event Name A value used to
uniquely define an event; returned
on asynchronous calls.
FADU Identifier A means of
identifying the FADU; location is
the only valid value.
File Access The inspection,
modification, replacement, or
erasure of a file's contents or a
portion of it.
File Access Data Unit (FADU)
The smallest unit of the file access
structure on which you can
transfer, delete, extend, replace, or
insert; contains zero or more data
unit; each FTAM file consists of
one or more FADUs.
File Attribute The name and
other identifiable properties that
describe a file, excluding file
contents.
File Contents A file's data units,
node names, and structuring
information that you can
manipulate during the File Open
regime.
File Management The creation
and deletion of files; the inspection
or manipulation of file attributes.
File Model A view of a file's
structure.
File Protocol Data Unit
(FPDU) The blocks of information
transferred between FTAM
initiators and FTAM responders.