Re: negative test case question

Whether the following mapping will fail or not will depend upon the data: 



<TriplesMap1> 
a rr:TriplesMap; 
rr:logicalTable [ rr:tableName "Employees" ]; 
rr:subjectMap [ rr:column "FirstName" ]; 
rr:predicateObjectMap 
[ 
rr:predicate foaf:name; 
rr:objectMap [ rr:column "FirstName" ] 
] 
For example, it will not fail for the following data (with uncommon first names) in the EMPLOYEES table: 


FirstName 
----------- 
http://example.com/ns#John 

http://example.com/ns#Mary 


Thanks, 
- Souri. 

----- Original Message ----- 
From: bvillazon@fi.upm.es 
To: juanfederico@gmail.com 
Cc: richard@cyganiak.de, public-rdb2rdf-wg@w3.org 
Sent: Thursday, February 9, 2012 9:17:46 PM GMT -05:00 US/Canada Eastern 
Subject: Re: negative test case question 


Hi Juan 


Thanks for this 



On Feb 10, 2012, at 1:56 AM, Juan Sequeda wrote: 


Let me clarify 


The following mapping is correct: 



<TriplesMap1> 
a rr:TriplesMap; 
rr:logicalTable [ rr:tableName "Employees" ]; 
rr:subjectMap [ rr:column "FirstName"; rr:termType rr:BlankNode ]; 
rr:predicateObjectMap 
[ 
rr:predicate foaf:name; 
rr:objectMap [ rr:column "FirstName" ] 
] 
. 


The following mapping should fail: 



<TriplesMap1> 
a rr:TriplesMap; 
rr:logicalTable [ rr:tableName "Employees" ]; 
rr:subjectMap [ rr:column "FirstName" ]; 
rr:predicateObjectMap 
[ 
rr:predicate foaf:name; 
rr:objectMap [ rr:column "FirstName" ] 
] 
. 


right? 




According to the spec 
<< 


If the term map does not have a rr:termType property, then its term type is: 

    • rr:Literal , if it is an object map and at least one of the following conditions is true: 
        • It is a column-based term map . 
        • It has a rr:language property (and thus a specified language tag ). 
        • It has a rr:datatype property (and thus a specified datatype ). 
    • rr:IRI , otherwise. 


>> 
So, if the FirstName column has "normal" first names … I think yes, it would fail 


Richard? 


Boris 










Juan Sequeda 
+1-575-SEQ-UEDA 
www.juansequeda.com 



On Thu, Feb 9, 2012 at 6:33 PM, Richard Cyganiak < richard@cyganiak.de > wrote: 


Juan, 


On 9 Feb 2012, at 23:51, Juan Sequeda wrote: 
> I'm coming up with r2rml mappings that should fail. 
> 
> The following is correct: 
> 
> <TriplesMap1> 
> a rr:TriplesMap; 
> rr:logicalTable [ rr:tableName "Employees" ]; 
> rr:subjectMap [ rr:column "FirstName"; rr:termType rr:BlankNode ]; 
> rr:predicateObjectMap 
> [ 
> rr:predicate foaf:name; 
> rr:objectMap [ rr:column "FirstName" ] 
> ] 
> . 
> 
> 
> If I take the rr:TermType rr:BlankNode, that should fail, right? 

I'm not sure what you mean. Do you mean, if you add “rr:termType rr:BlankNode” to the object map, then it should fail? 

Why do you think so? 

Richard