The -DC Lines tab is dedicated to the description of the CODASYL, DMSII, and TANDEM Database Blocks. You can declare the areas, call the records, and distribute them within the AREAS, call the SETS and describe them (name, label, parent, and child Segments).
The Comments column is displayed only in the table of the tab. It does not correspond to a field of the call line definition section. It contains an asterisk on the call lines that have been assigned -G lines. These secondary-level -G lines have been entered with the -G Lines button in the call line definition section. If you hover your cursor on the asterisk, the -G lines of the call line are displayed in a tooltip. If you click the button that is associated with the asterisk, the -G lines are displayed in their tabular editor, where you can modify them. You can also display and modify the -G lines from the Edit comments choice in the contextual menu of the call line.
Value | Description |
---|---|
* | Continuation of a set. For a set with multiple members, the first member Segment is indicated on an S-type line and the other Segments on *-type lines. |
S | Set (default option). |
A | Area, TANDEM database |
R | Record. |
You enter the Segment code which corresponds to the called record. When the Database Block is generated, this code is displayed after the RECORD clause.
To modify the contents of this field, click Change. Then select a Segment. If the list is large, you can reduce it by entering a string that is used as a filter (the filtering is performed on the code or on the label of the instance).
This field can be used with an S-type line only.
Only used for IDMS (D3, D4 types), DM4 (M3 type) and DMS (S3 type) subschemas.
On an R-type line, you can change the description of the selected record.
Depending on the value of the Type of line selected, you enter:
You can select a subschema at the Block description level. To do so, on R-type lines, enter SS=n (with n being the subschema number according to the definition). For an IDS2 (I3) subschema, it is possible to call an object (area, record, set) without redescribing it, by specifying: INCLUSION.
You enter the name of the physical file which supports the data. When the Database Block is generated, this name is displayed after the FILE IS clause.