[rules-dev] Slot Specific and Refraction

[Mark Proctor]

  On 04/08/2010 11:46, Wolfgang Laun wrote:
> A remark on the proposed syntax:
>    onChange == [name1, name2, name3]
> defines a set of slots by explicit enumeration, whereas
>    onchange == [ ! name1, !name2, *]
> defines a set my subtracting the enumerated slots from the full set.
>
> I think that using
>    onChange == [ ! name1, *, name2 ]
> doesn't make sense, since "name2" is already in '*'. This means that
> only negated slot names make sense in combination with '*'. This,
> in turn, means that '*' in addition to a list of negated slots is
> redundant.
That is true, the * could be considered explicit if you have one ore 
more negated slots.
>
> Therefore, only a list of all positive /or /all negated slot names makes
> sense. Thus, all possible sets can be defined by permitting nothing
> but one of these forms:
>    onChange == [<name>,...]
>    onChange == [*]
>    onChange != [<name>,...]   // subtract all enumerated from full set
agreed
>
> One can also permit these two identical forms:
>    onChange == []
>    onChange != [*]
> and
>    onChange != []
> which is the same as
>    onChange == [*]
yup, I like those ideas too. I'll get the wiki updated with them.

Mark
>
> Best
> -W
>
>
>
>
> On 31 July 2010 20:53, Mark Proctor <mproctor at codehaus.org 
> <mailto:mproctor at codehaus.org>> wrote:
>
>     http://blog.athico.com/2010/07/slot-specific-and-refraction.html
>
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