Re: where to hang the metadata?

 > Thinking over today's difficult discussion about metadata, it seems to
> me that the right solution is this:
> 
>    1.  Allow metadata, syntactically, on every object, by way of a
>        <meta> child element which is legal on every capitalized (class)
>        element.  No need for wrapper elements.  In a normal rule, the
>        "Forall" is where you'd hang the metadata.  I have some ideas for
>        the PS, but no favorites.
> 
>    2.  Add a "group" element, for making these conceptual groupings that
>        Michael speaks of (and I'm familiar with from my own rule
>        programming), where the metadata applies to a set of a few
>        rules).
> 
> What about this approach would be so bad?

For me the question was not how to attach metadata, but rather whether 
and how to identify rules.

For a long time our top-level element in RIF was the ruleset and the 
second-level element was the rule.

Recently the notion of "group" was introduced, which lies between the 
ruleset and the rule: a ruleset contains groups and groups contain rules.
So, we have:

Ruleset
    |
  Group
    |
  Rule

I myself do not really see the need for this group element in BLD, but I 
do not strongly object to it.

The current draft of BLD allows identifying rule sets and groups, but 
not rules.  I was arguing that it should be possible to identify rules.


Best, Jos

> 
>        -- Sandro
> 

-- 
Jos de Bruijn            debruijn@inf.unibz.it
+390471016224         http://www.debruijn.net/
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