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Re: test case results expressed in ResultSet terms

From: Jos De Roo <jdroo@skynet.be>
Date: Sat, 26 Jun 2004 22:08:13 +0200
Message-ID: <40DDD7AD.9010502@skynet.be>
To: eric@w3.org
Cc: public-rdf-dawg@w3.org

EricP wrote:
 > A while back, AndyS and some others settled on a scheme defining
 > ResultSets [1]. This seems like work we can use for expressing the
 > expected results for a given query.
 >
 > RDF Query and Rules Framework [2] leans on this schema and I've
 > mostly* adopted this for the Algae tests. The Optional2 test [3],
 > which is already in the test cases, looks like this as a table:
 >
 > 
+-------------------------+-------------------------+-------------------------+-------------------------+-------------------------+
 > |                        n|                        
d|                        e|                        
f|                        g|
 > 
|-------------------------|-------------------------|-------------------------|-------------------------|-------------------------|
 > | <http://example.org/n#A>|                     
NULL|                     NULL|                     
NULL|                     NULL|
 > |<http://example.org/n#A2>|                     
NULL|                     NULL|                     
NULL|                     NULL|
 > 
|<http://example.org/n#A3>|<http://example.org/n#D3>|<http://example.org/n#E3>|<http://example.org/n#F3>|                     
NULL|
 > 
|<http://example.org/n#A4>|<http://example.org/n#D4>|<http://example.org/n#E4>|<http://example.org/n#F4>|<http://example.org/n#F4>|
 > 
+-------------------------+-------------------------+-------------------------+-------------------------+-------------------------+
 >
 > and this as a ResultSet:
 >
 > @prefix rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 > @prefix rs:     <http://jena.hpl.hp.com/2003/03/result-set#> .
 >
 > [] rdf:type rs:ResultSet ;
 >     rs:resultVariable "n" ;
 >     rs:resultVariable "d" ;
 >     rs:resultVariable "e" ;
 >     rs:resultVariable "f" ;
 >     rs:resultVariable "g" ;
 >     rs:size "4" ;
 >     rs:solution
 >     rs:solution
 >         [ rdf:type rs:ResultSolution ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "n" ; rs:value 
<http://example.org/n#A> ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "d" ; rs:nonValue "NULL" ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "e" ; rs:nonValue "NULL" ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "f" ; rs:nonValue "NULL" ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "g" ; rs:nonValue "NULL" ]
 >         ] ;
 >     rs:solution
 >         [ rdf:type rs:ResultSolution ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "n" ; rs:value 
<http://example.org/n#A2> ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "d" ; rs:nonValue "NULL" ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "e" ; rs:nonValue "NULL" ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "f" ; rs:nonValue "NULL" ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "g" ; rs:nonValue "NULL" ]
 >         ] ;
 >     rs:solution
 >         [ rdf:type rs:ResultSolution ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "n" ; rs:value 
<http://example.org/n#A3> ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "d" ; rs:value 
<http://example.org/n#D3> ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "e" ; rs:value 
<http://example.org/n#E3> ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "f" ; rs:value 
<http://example.org/n#F3> ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "g" ; rs:nonValue "NULL" ]
 >         ] ;
 >         [ rdf:type rs:ResultSolution ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "n" ; rs:value 
<http://example.org/n#A4> ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "d" ; rs:value 
<http://example.org/n#D4> ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "e" ; rs:value 
<http://example.org/n#E4> ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "f" ; rs:value 
<http://example.org/n#F4> ] ;
 >           rs:binding [ rdf:type rs:ResultBinding ;
 >                        rs:variable "g" ; rs:value 
<http://example.org/n#F4> ]
 >         ] .
 >
 >
 > * I've substituted rs:nonValue** "NULL" for rs:value rs:undef in
 >   order to distinguish the case where I got no bindings from the
 >   case where I got a binding to the resource rs:undef.
 >
 > ** In analogous presumption, I plan to introduce foaf:UnPerson
 >    without Danbri's consent.

:)
I was also trying to run your "nested optional arcs" test case
and had to make some corrections in our implementation so that
in fact only those 4 results are returned (also using a design
that allows result interpretation as it refers to the query).

So querying the facts given in
http://eulersharp.sourceforge.net/2004/04test/ericP.n3
with filter
http://eulersharp.sourceforge.net/2004/04test/ericF.n3
results in
http://eulersharp.sourceforge.net/2004/04test/ericE.n3

Remark the open '?'-marked resources in the results i.e.
(:A ?d ?e ?f ?g) da:bindingFor < ... /ericF.n3>.
(:A2 ?d ?e ?f ?g) da:bindingFor < ... /ericF.n3>.
(:A3 :D3 :E3 :F3 ?g) da:bindingFor < ... /ericF.n3>.
(:A4 :D4 :E4 :F4 :F4) da:bindingFor < ... /ericF.n3>.

-jos


 > [1] http://jena.hpl.hp.com/2003/03/result-set
 > [2] http://www.w3.org/2001/11/13-RDF-Query-Rules/terms
 > [3] 
http://dev.w3.org/cvsweb/perl/modules/W3C/Rdf/test/Optional2-alg.sh?rev=HEAD&content-type=text/x-cvsweb-markup
 > --
 > -eric
 >
 > office: +81.466.49.1170 W3C, Keio Research Institute at SFC,
 >                         Shonan Fujisawa Campus, Keio University,
 >                         5322 Endo, Fujisawa, Kanagawa 252-8520
 >                         JAPAN
 >         +1.617.258.5741 NE43-344, MIT, Cambridge, MA 02144 USA
 > cell:   +1.857.222.5741 (does not work in Asia)
 >
 > (eric@w3.org)
 > Feel free to forward this message to any list for any purpose other than
 > email address distribution.

-- 
Jos De Roo, AGFA http://www.agfa.com/w3c/jdroo/
Received on Saturday, 26 June 2004 18:27:29 GMT

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