NX9: Reporting Attributes Values to BOM Feilds

[3dr]

This would be from one attribute category to another. (See attached Screen dump)

Source Attributes Category = Specifications (These Drive the Model)
Attribute Name = Model, Type = String, Value = LJ (Can be L or LJ)
Attribute Name = Part Number, Type = Number, Value = 500.080 (can a wide range of inputs)
Attribute Name = Mtg Option, Type = String, Value = B21 (can be TO, B21 or B322)

Target Attributes Category = BOM (This appears in the Bill of Mat'l)
Attribute Name = BOM_6_CAT_NO, Desired value = LJ.500.080.B21

I'm using this expression but it's only designed to report numbers.
EX: format("LJ.%0.3f ",PN)
How do I modify it to report the other two "string" type attributes along with it???


TIA for any help

Dave