Re: [topbraid-users] Different behavior between TBC and TBL

[Scott Henninger]

Steve, yes it is the case that behavior of the SPARQL engine can be different over different versions - note that SPARQL 1.1 became a recommendation in mid-2013 - 4.2 pre-dates that.  And BIND semantics have proven to be the most troublesome in terms of changes.  IIRC, there are still some minor issues in our current version that may or may not have been addressed in the most recent versions of Jena.  (We will update later in January with 4.4.) Yes, there are differences between versions.  Almost always. -- Scott On 12/30/2013, 8:34 PM, Steve Ray wrote: Hi Folks, I was debugging a problem I was having with a query, and I think I have stumbled on a bug in TBL.  Here is a very simple demonstration of something behaving differently between TBC and TBL: SELECT * WHERE {     OPTIONAL {         ?x rdf:value "dog" .     } . BIND (IF(bound(?x), "x is bound!", "x is not bound!") AS ?result) .     } If you run this in TBC, it binds the value “x is not bound!” to ?result, as you might expect, and the value of ?x is unbound. However, running this on our TBL instance on AWS, you get ?x bound to “x is not bound!” and ?result is not bound. This is very unexpected. We’re running version 4.2.1 of TBL, and 4.3.0 of TBC, but I’m surprised if the behavior of IF changed between 4.2 and 4.3 Any thoughts? Can you reproduce this effect?  - Steve Steven R. Ray, Ph.D. Distinguished Research Fellow Carnegie Mellon University NASA Research Park Building 23 (MS 23-11) P.O. Box 1 Moffett Field, CA 94305-0001 Email:    steve....@sv.cmu.edu Phone: (650) 587-3780 Cell:      (202) 316-6481 -- -- You received this message because you are subscribed to the Google Group "TopBraid Suite Users", the topics of which include Enterprise Vocabulary Network (EVN), TopBraid Composer, TopBraid Live, TopBraid Insight, SPARQLMotion, SPARQL Web Pages and SPIN. To post to this group, send email to topbraid-users@googlegroups.com To unsubscribe from this group, send email to topbraid-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/topbraid-users?hl=en --- You received this message because you are subscribed to the Google Groups "TopBraid Suite Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to topbraid-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- You received this message because you are subscribed to the Google Group "TopBraid Suite Users", the topics of which include Enterprise Vocabulary Network (EVN), TopBraid Composer, TopBraid Live, TopBraid Insight, SPARQLMotion, SPARQL Web Pages and SPIN. To post to this group, send email to topbraid-users@googlegroups.com To unsubscribe from this group, send email to topbraid-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/topbraid-users?hl=en --- You received this message because you are subscribed to the Google Groups "TopBraid Suite Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to topbraid-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.