[isabelle-dev] Interpretation in arbitrary targets.

Tobias Nipkow nipkow at in.tum.de
Thu Apr 18 09:14:16 CEST 2013

Let me just make some remarks as a user. At ITP 2011 I published a paper
http://www21.in.tum.de/~nipkow/pubs/itp11.html where I showed how to use locales
to structure stepwise development of modules (see p11). In that context I
intentionally used the notation

interpretation (in A) B-expr

instead of sublocale in an implementation step. Of course I comment on the
deviation in the notation saying that I have chosen this variation of
interpretation because it is more intuitive (see p10). I do find it more
intuitive because it tells me clearly what is going on: some locale expression
is interpreted in some locale. And this is also how you explain sublocale in
your locale tutorial. Hence Florian's suggestions made a lot of sense to me.


Am 17/04/2013 22:28, schrieb Clemens Ballarin:
> Quoting Makarius <makarius at sketis.net>:
>> On Fri, 12 Apr 2013, Clemens Ballarin wrote:
>>> That sounds a bit dogmatic.  If additional commands are made available for
>>> targets, then the syntax should clearly be more flexible if better intuition
>>> can be achieved.
>> That is just a matter of modularity of concepts: the older "(in a)" notation
>> was slightly generalized at some point to allow named contexts as sketched
>> above, and the relation between the two is as pointed out by Florian.
> I am aware of the modularity aspect of this.  My criticism is that deviations
> from the current approach in favour of preferable notation are not even
> considered.  In any case, I'm not sure how useful the old notation still is. 
> Maybe it can be given up at some point.
> Clemens
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