Another scheme/dsssl question

[Norman Walsh <norm@xxxxxxxxxxxxx>]

Is it possible to test for the existance of a definition?

Suppose I want to make it possible for a derived stylesheet to
override a value.  I'd like to write something like this:

(define default-foo '("x" "y" "z"))
...
(if (some-predicate? foo)
    foo
    default-foo)

Is that possible?

--norm


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