Parameterized Design Template Equipment

The following shows an example of parameterized Design Template Equipment:

Parameter expressions allow the result of an expression to be based on a conditional test (If, Then, Else). This expression function will take the form:

IF(<Boolean Expression>, <True Expression>, <False Expression>)

If the Boolean Expression returns true then the IF function returns the result of the True Expression, and if the Boolean Expression returns false then the result of the False Expression is returned. The True Expression and the False Expression must return results of the same data type.

An example of use of this expression is as follows:

IF(LDPR LENG OF TMPL lt 2400, (ID/BS-SPEC/45x45x4.0),

(ID/BS-SPEC/50x50x5.0) )

where the specification reference of a steel profile depends on the LENG property of a template.

Since IF is an PDMS expression function, it can be used within an PDMS expression according to the normal rules for use of functions inside PDMS expressions. Therefore the <True Expression> and <False Expression> can contain IF function calls, which allows simple nested conditional statements to be constructed.