Parsing with XS

[Patricia M Godfrey pmgodfrey@xxxxxxxx]

Is there any way to get something that has been defined as a variable and
obtained by an XPL routine (rather than directly entered with
≪SV01,something≫) as the first term of a parse routine using XS? For
example, if I run this bit of code:

XPLeNCODE v2.0
b-gin [UNTITLED]
{<}SX100,{<}VA$DA yyyy-mm-dd{>}{>}{<}SV01,{<}PV100{>}{>}{<}SV
02,-{>}{<}XS01,02,03,04,05{>}[#8_]Results SG 01 IS {<}GT01{>}
, SG 02 IS {<}GT02{>}, SG 03 IS {<}GT03{>}, SG 04 IS {<}GT04{
>}, SG 05 IS {<}GT05{>}.
-nd
XPLeNCODE

I get this in the file in Window 8:
Results SG 01 IS ≪PV100≫, SG 02 IS -, SG 03 IS , SG 04 IS , SG 05 IS .

But if I do this (i.e., hardcode the value of SV01):
XPLeNCODE v2.0
b-gin [UNTITLED]
{<}SX100,{<}VA$DA yyyy-mm-dd{>}{>}{<}SV01,2003-10-16{>}{>}{<}
SV02,-{>}{<}XS01,02,03,04,05{>}[#8_]Results SG 01 IS {<}GT01{
>}, SG 02 IS {<}GT02{>}, SG 03 IS {<}GT03{>}, SG 04 IS {<}GT0
4{>}, SG 05 IS {<}GT05{>}.[cr|lf]
-nd
XPLeNCODE
I get this in the file in Window 8:
Results SG 01 IS 2003-10-16, SG 02 IS -, SG 03 IS 2003, SG 04 IS -, SG 05
IS 10-16.

Which is what I want. I did look at Robet's discussion of this in
CtrlChars, but could not find where it expressly addressed this.
Wildcards, yes, but not passing variables.
TIA
Patricia