[Attempto] Warnings about noun phrases and anaphora in relative sentences

[Joshua TAYLOR]

One of the examples from the 6.6 DRS Report is

"Every card the code of which is correct is valid."

The webservice parses this and produces the DRS described by the
report, but also produces a warning:

"The definite noun phrase 'the code' does not have an antecedent and
thus is not interpreted as anaphoric reference, but as a new
indefinite noun phrase."
"If the definite noun phrase 'the code' should be an anaphoric
reference then you must introduce an appropriate antecedent."

Is this warning appropriate for this case?

-- 
Joshua Taylor, http://www.cs.rpi.edu/~tayloj/