National foreword
Committees responsible
Specification
0 Introduction
1 Scope and field of application
2 Conformance
3 References
4 Definitions
5 Interchange file
6 Description of user data types and structures
7 Coded character set extensions
Annexes
A Guidelines for implementation
B Data field examples
C DDF model and logical record structure
Tables
1 Delimiters and their uses
2 Compound data field descriptors
Figures
1 File and file label schematic representation
2 Expanded logical schematic representation of data
    descriptive file
3 DDR schematic
4 DDR leader schematic
5 DDR entry map schematic
6 DDR directory entry schematic
7 File control field schematic
8 DR leader schematic
9 DR leader schematic
10 DR entry map schematic
11 DR directory entry schematic
12 Level 2 data descriptive area schematic
    representation
13 Examples of ordered rooted trees
14 Generic structure of a logical record
15 Instance of a user data tree
16 Binary tree corresponding to the rooted tree shown
    in figure 15