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