IBM System 360 User Manual page 30

the following EDIT command specifies that you are going to create a new
data set named ACCTS.DATA. After you enter the command the system
enters input mode.
READY
edit accts.data new
INPUT
In the following example, the OLD operand of the EDIT command
specifies that you want to edit an existing data set named PARTS. TEXT.
After you enter the command, the system enters edit mode.
READY
edit parts. text old
EDIT
As you can see. the NEW operand specifies that you are going to
create a data set. and t.he OLD operand specifies that the data set
already exists.
The name you give a data set should follow certain conventions. A
data set name has three fields.
1. Identification qualifier.
2. User-supplied name.
3. Descriptive qualifier.
The fields must be separated by periods. The total length of the
name, including periods, must not exceed 44 characters. For example, a
typical data set name is:
SMITH.ACCTS .. DATA
Identification qualifier _ _ _ _ _ _
---' t
1
I
User-supplied name -
Descriptive qualifier----------------------~
When you create a data set you need only specify the user-supplied
name. The system supplies values for the other two fields. The
identification qualifier is the user identification you specified with
the LOGON command. The descriptive qualifier is one of those listed in
Figure 3. The system infers the descriptive qualifier from the data set
type operand entered with the EDIT command. If you do not specify a
data set type the system prompts you for it. (You should carefully note
the distinction, as shown in the following paragraphs, between data set
type and descriptive qualifier.) If you prefer you can specify the
descriptive qualifier as part of a data set name, for example:
PARTS. DATA
You may specify a fully qualified name (a name with all three
qualifiers) by enclosing it in apostrophes. For example,
'JONES.PROG1.ASM'
This is a useful procedure when you have to use a data set with an
identification qualifier other than your own user identification.
30 TSO Terminal User's Guide (Release 21)