| Free-Form Syntax |
For data structures,
specify the EXT keyword
or the EXTNAME keyword
as the first keyword.
For subfields, use the EXTFLD keyword
as the first keyword. |

This position is used to identify a data structure or data-structure subfield
as externally described. If a data structure or subfield is not being defined
on this specification, then this field must be left blank.
- Entry
- Explanation for Data Structures
- E
- Identifies a data structure as externally described: subfield definitions
are defined externally. If the EXTNAME keyword is not specified, positions
7-21 must contain the name of the externally described file containing the
data structure definition.
- Blank
- Program described: subfield definitions for this data structure follow
this specification.
- Entry
- Explanation for Subfields
- E
- Identifies a data-structure subfield as externally described. The specification
of an externally described subfield is necessary only when keywords such as
EXTFLD and INZ are used.
- Blank
- Program described: the data-structure subfield is defined on this specification
line.