Re: [Virtuoso-users] User Defined rules in Virtuoso

[Kingsley I. <ki...@op...>]

On 12/15/11 11:25 AM, Manish Hardasmalani wrote:
> Hi,
>
> This is related to Defining User Defined rules in Virtuoso, i need
> help related to below requirement.
> Below is my exact requirement :
>
> A firm may want to know what line of business among many that the firm
> deals with, does the customer do business with. For example, these
> rules could be
>
>
>
> (?client :hasProduct :product1) =>  (?client :isWithLOB :lob1)
>
> (?client :hasProduct :product1 . ?client :hasProduct :product2) =>
> (?client :isWithLOB :lob2)
>
> How could we express these in rule sets?

For now, you can use SPARQL CONSTRUCT, later we'll be delivering 
Datalog/Prolog like rules.

Your horn rule above is on a horizontal plane. Here is the same rule on 
a vertical plane courtesy of SPARQL:

CONSTRUCT {?client :hasProduct :product1}
WHERE {?client :isWithLOB :lob1}

Basically, you can materialize the triples from the above as part of an 
ETL routine via:

INSERT INTO <LOBGraph>
{?client :hasProduct :product1}
WHERE {?client :isWithLOB :lob1} .

HTH

Kingsley
>
> Thanks,
> Manish Hardasmalani
>
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Kingsley Idehen	
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OpenLink Software
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