Re: [Rd] Package dependencies and imports

From: Martin Maechler <>
Date: Fri 22 Sep 2006 - 08:00:43 GMT

>>>>> "Seth" == Seth Falcon <> >>>>> on Thu, 21 Sep 2006 10:33:06 -0700 writes:

    Seth> Martin Maechler <> writes:
>> I think you should use the new DESCRIPTION field and say
>> 'Enhances: rgl'
>> but I haven't checked if this prevents the warning,
>> though I think it should..

    Seth> But is Rcmdr enhancing rgl or being enhanced by rgl?

    Seth> :-( :-(

I think this distinction is not so easily made on a general level. I'd say an argument for how you can (should?) think about this is the following abstraction:

 There are two packages, A and B.
 A's DESCRIPTION has 'Enhances: B'.
 When B is there, A provides extra features.  In one sense, this always enhances B ("enhance" in the usual  English meaning), since B's area of application has been  enlarged by code in A.

Martin mailing list Received on Fri Sep 22 18:02:59 2006

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