4.4. Named Expressions inserted into Expressions
Purpose
Test an item to see if it has a specified quantity of a certain part.
Include a named expression in the expression.
Assumptions
There is one List group (in the expression), defined as follows.
| Parts | Attributes include quantity, id. |
Query Expression
Parts($pqty$
=’7’&Parts.id=’id1’
)
Where
| Criteria | Is/are the: |
| Pqty | Parts.quantity named expression. |
| $$ | Syntax surrounding the named expression. |
| id | Nested Parts list group attribute |
| 'id1' | Part name |
Query expressions say:
Return True for items that have 7 id1 parts in their Parts group