[isabelle-dev] Interpretation in arbitrary targets.

[Florian Haftmann]

>> You might still argue about syntax, e.g. having separate commands
>>  subscription – what is currently interpretation and subscription, not
>> in free-floating contexts (as implemented in the patches).
>>  interpretation – only in confined contexts (locales, context begin …
>> end, but not global theories any longer) without any subscription.
> 
> That paragraph is very difficult to understand.

OK, another attempt.  You can also have two distinguished commands
* subscription – interpretation with permanent subscription
* interpretation – without any subscriptions

By their very nature, interpretation would not be possible on the global
level, and subscription would not be possible in unnamed contexts.

> Note that we have one more aspect in the back-end that could help here:
> the 'private' modifier.  Its meaning was not fully defined so far, but
> it could do the job:
> 
>   context B
>   begin
> 
>   private interpretation A ...
>   private interpretation A' ...
>   private interpretation A'' ...
> 
>   interpretation A'' ...
> 
>   end
> 
> Until I manage to get 'private' as command modifier into the toplevel
> interpreter, we can tentatively use 'private_interpretation'.

So the proposal would be to have two commands
* interpretation (»subscription« from above)
* private_interpretation (»interpretation« from above)

Until now I have been thinking about »private« to be a certain name
space policy.  I don't forsee how exactly this relates to subscriptions.
 Maybe it is a different thing.  For this reason I would prefer my own
naming scheme at the moment.

Cheers,
	Florian

-- 

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