FTAM/9000 Programmer's Guide

40 Chapter 1
HP FTAM/9000 Overview
Overview of FTAM Concepts
Constraint Sets
Document types restrict the type of file by specifying constraint sets.
Constraint sets specify the allowable file structures and the ways in
which access actions can modify the structure. Constraint sets are either
Unstructured or Sequential Flat. (Refer to Figure 1-5 and Figure 1-6
for file structure information of these two types.) For more information
on constraint sets, refer to the “Document Types and Constraint Sets”
chapter.
Access Contexts
Constraint sets restrict the type of access contexts available. Access
contexts specify how the information in the file is accessed. You specify
access contexts only when reading a file.
Figure 1-4 FTAM Document Types
Document Types
Constraint Sets
Access
Contexts