Dear All,
The W3C Rule Interchange Format (RIF) Working Group recently published
"Last Call" drafts of two of its specifications:
- "RIF Basic Logic Dialect" (BLD) specifies an XML format for rules
at an intermediate expressive power. The language is roughly
Horn rules with URIs, datatypes, and builtins. This goes beyond
datalog (it has function terms), it but does not provide any kind
of negation. (Various forms of negation, and other features,
are expected to be provided by dialects which extend BLD, to be
published in the future.)
http://www.w3.org/TR/rif-bld/
- "RIF RDF and OWL Compatibility" explains and specifies how RIF
rulesets are to be used in combination with RDF and OWL.
http://www.w3.org/TR/rif-rdf-owl/
LAST CALL IS THE KEY TIME FOR EXTERNAL REVIEW. The designs are
essentially complete (the Working Group believes the design work is
done), but things can still be changed in response to external input.
Additionally, input on editorial issues (especially pointing out
ambiguities) is always welcome.
In addition to these Last Call documents, the Working Group has
published four other drafts:
- RIF Production Rule Dialect (PRD) specifies an XML format for the
exchange of production rules. PRD and BLD are expected to be the
basis of the two main dialect-branches, with RIF Core being the
things in common between the two. (We have not yet published a
document expressing that intersection, but it can be inferred
from the PRD and BLD specifications.) This is a first public
working draft. This is an exellent time to comment on the
general direction of the language, and give feedback on all the
issues mentioned as Editor's Notes in the document.
http://www.w3.org/TR/rif-prd/
- RIF Framework for Logic Dialects (FLD) and RIF Datatypes and
Builtins (DTB) provide common elements for specific dialects to
use.
http://www.w3.org/TR/rif-fld/
http://www.w3.org/TR/rif-dtb/
- RIF Uses Cases and Requirements (UCR), last published about two
years ago, has been simplified and now has examples written in
the PRD and BLD presentation syntaxes. The examples can be
hidden or revealed using Javascript controls.
http://www.w3.org/TR/rif-ucr/
Feedback on all these documents should be sent to:
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
All comments (and responses to them) will be available at the public
archive:
http://lists.w3.org/Archives/Public/public-rif-comments/
Please comment by 19 September so we have time to address your comments
in incorporate any changes into our next round of publications.
Best,
Adrian Paschke
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