I'm reletively new to povray, and am having trouble with reading records
from files.
I would simply like to know if there is any way to test a Variable to see if
it is a string or not, then, if it is a string, I'd like povray to test the
variable to see if is equall to "D1". I know the answer is probably very
simple, and all i want is a refence to another source which could help me.

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