HP Integrity NonStop J-Series - Manual (Page 112)

CREATING AND RUNNING A MULTIFILE APPLICATION
Associating and Linking Boxes
Figure 5-15 shows the partial contents of the files associated
with the application that displays the screen shown in
Figure 5-14. This figure also shows the records from each file
that qualify for the application-access path.
When the tree structure of an application has more than two
levels, records qualify for the application-access path as
follows:
1. The application can read or insert any record for the box at
the first level of the tree. Therefore, all records for this
box qualify for the application-access path.
2. The application can read or insert a record for a box at the
second level of the tree only if that record matches (has the
same join-field value) a record for a box at the first level
of the tree. Therefore, to qualify for the application-
access path, a record at the second level of the tree must
match any record at the first level of the tree.
3. The application can read or insert a record for a box at the
third level of the tree only if that record matches (has the
same join-field value) a qualified record for a box at the
second level of the tree. Therefore, to qualify for the
application-access path, a record at the third level of the
tree must match a qualified record at the second level of the
tree.
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