From: Mike Dean ([email protected])
Date: 06/29/04
> Just noticed that there are some "*'"'s missing from the abstract syntax
> in the SWRL V0.6 document,
> in order for it to correspond to our intention and to the XML
> serialization syntax.
[1] earlier notes that
components that can occur any number of times (including zero) are
enclosed in braces ({.})
and braces are used in each of these productions, so I think the document is
correct as is.
> More subtly, there's another issue in both the abstract syntax and
> the XML serialization syntax:
> do we want to permit a rule to have no atoms in its consequent AND no
> atoms in its antecedent? I think this was discussed a while ago
> and we decided that it was OK. But if not, we should say so somewhere
> in the abstract syntax section.
That's my recollection as well, but we can confirm on today's telecon.
Mike
[1] http://www.daml.org/rules/proposal/abstract.html
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