[jira] [Commented] (RYA-71) Order of statement patterns affects inference

["David W. Lotts (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/RYA-71?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15258686#comment-15258686 ] 

David W. Lotts commented on RYA-71:
-----------------------------------

This may be resolved in the *develop* branch.  Above says it was run on the Master branch which has not yet gone thru a release process.  Everyone should use the develop branch until a release happens.


> Order of statement patterns affects inference
> ---------------------------------------------
>
>                 Key: RYA-71
>                 URL: https://issues.apache.org/jira/browse/RYA-71
>             Project: Rya
>          Issue Type: Bug
>          Components: sail
>            Reporter: Puja Valiyil 
>            Assignee: David W. Lotts
>
> A user directly emailed me this bug:
> (Our testbed software configuration:
> web.rya 3.2.10-SNAPSHOT (This was from the master branch)
> accumulo 1.7.1
> zookeeper 3.4.8
> hadoop 2.6.4
> )
> The problem was found using a LUBM 1-University dataset (dataset attached):
> Query 1:
> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> PREFIX ub: <http://swat.cse.lehigh.edu/onto/univ-bench.owl#>
> SELECT DISTINCT ?X
> WHERE
> { ?X rdf:type ub:Organization . 
> ?X ub:subOrganizationOf <http://www.University0.edu>. } 
> The result set is incorrect containing unrelated instances of type University. At the same time, the same query but with the order of statements switched (Query 2 below) returns correct results:
> Query 2:
> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> PREFIX ub: <http://swat.cse.lehigh.edu/onto/univ-bench.owl#>
> SELECT DISTINCT ?X
> WHERE
> { ?X ub:subOrganizationOf <http://www.University0.edu>. 
> ?X rdf:type ub:Organization . } 
> Additionally, we have discovered a problem with the following query:
> Query 3:
> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> PREFIX ub: <http://swat.cse.lehigh.edu/onto/univ-bench.owl#>
> SELECT DISTINCT ?X ?Y
> WHERE
> { ?X ub:subOrganizationOf ?Y. ?Y rdf:type ub:University . 
> ?X rdf:type ub:ResearchGroup . } 
> This is similar to Query 1, but widens the query to all instances of type University. The query incorrectly returns 0.
> They also directly emailed me their data if you cannot recreate it easily.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)