answer file of type ... ?

[kee nethery]

I have some iCal export files I want to select with the answer file  
command. I'd like to limit the answer file selection to just the iCal  
export files.

Two questions:

What are the scripts I would use on MacOSX, Windows, and Unix to  
limit the selection in answer file to be just the iCal export files?

How did you determine the file type or filter with parameters to use  
for each of the answer file scripts?


The docs imply there are different answer file scripts required for  
each OS but the examples are not marked as OS specific. The docs show  
types and filters but for the types, they don't tell you how to  
obtain the desired type or filter information from a path specified  
file. Filters do not appear to work on Mac OS X (or there is some  
magic that I'm just not performing to get a simple .ics filter to work).

Thanks in advance.

Kee Nethery