On 2/10/2011 8:07 AM, Wolfgang Laun wrote:
On 9 February 2011 22:11, Edson Tirelli <ed.tire...@gmail.com
<mailto:ed.tire...@gmail.com>> wrote:
Pierre,
Good to see works like yours being done.
Drools has an internal canonical model that we use to round
trip rules between the syntaxes we support. The best way of
supporting "RIF" in Drools is to simply add a parser that parses
RIF and populates the canonical model. From that we have a DRL
"dumper" that generates DRL, enabling the RIF->DRL translation.
Also, if we create a RIF "dumper", one can then generate RIF rules
from the canonical model, enabling DRL->RIF translation. That
assumes that there is a 1-to-1 semantic mapping between RIF and
DRL (I believe there is, but didn't checked).
Do you mean that all of RIF can be expressed in DRL? Then I'd agree.
But you can't express all of DRL in RIF.
-W
A translator RIF-PRD2DRL should be "conformant RIF-PRD consumer" as in
the recommendation
<http://www.w3.org/TR/2010/REC-rif-prd-20100622/#Semantics-preserving_transformations>.
A translator DRL2RIF-PRD should be a "conformant RIF-PRD producer".
For example, a heuristic validation (test-based) may work in a
"round-trip" i.e. take a Drools ruleset R, do R_RIF= DRL2RIF-PRD(R)
then R1= RIF-PRD2DRL(R_RIF) and compare answers by running Drools on R
and R1
When Wolfgang said that not all Drools constructs can translate to
RIF-PRD I assume he is thinking to some lets say "nonlogical" or
"procedural" Drools constructs.
However, because RIF can encode any partial recursive function, DRL2RIF
should be always possible i.e. when translating a ruleset from Drools,
one may obtain not only PR rules but, in addition some RIF-BLD rules too.
Therefore I assume that there is very nice work to do.
-.Adrian Giurca
Edson
2011/2/9 <p...@agh.edu.pl <mailto:p...@agh.edu.pl>>
Mark, Andrew, Guys,
Yes working with DRL may be better for Drools indeed. But the
only way I
see this working is by implementing this directly in the code
of Drools.
That's not practical for me, hence I "simply" export/import
the rules
in/from XML. This way I can focus on the translation.
If someone would give me pointers on an easy way to work with
DRL, I'd do
that of course.
I assume you already had discussions on XML (or anything more
structured
and widely spread than DRL) as working format so I won't be
going there :)
All the best,
Pierre
On 09/02/2011 16:46, Mark Proctor wrote:
> On 09/02/2011 08:40, pdl at agh.edu.pl <http://agh.edu.pl>
wrote:
>> Hi all,
>>
>> I've been working on translators between RIF-PRD, DroolsML
and JessML.
>> I've put the translators in the form of XSLT stylesheets on the
following
>> web site along with samples of rules written in the above
languages. I
>> would greatly appreciate feedback/comments/tips/help on
making these
>> translators more reliable and accurate.
>>
>> Web site: yieldrif (dot) appspot (dot) com (in case emails
containing
>> URLs are bounced off)
>>
>> Please note that this is free hosting and has some
limitations. Feel
free
>> to add/comment content on this web site or drop me a line.
What would
be
>> really helpful is a XML Schema for DroolsML and also the
rhs to be in
XML
>> as opposed to drools code.
> Is this converting to Drools DRL? or to our deprecate,
unmaintained, out
> of date and very old XML?
Sorry someone just read that sentence back to me, and it
probably read
very wrong.
Let me start again. First up great work, it's good to see any
interchange work happening, it's not easy stuff. And I can't
wait for us
to figure out how to get this working directly against our
more recent
DRL :)
Mark
> Mark
>> I look forward to hearing from you,
>> Pierre
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Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com <http://www.jboss.com>
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