... On a related note, another "feature" is that MySQL strips trailing spaces from varchar columns, with the result that the literals "", " " and " " (and so...
Hummm. Thanks for pointing this out, another MySQL feature I hadn't appreciated. I'll take a look - if the MySQL feature itself can't be supressed then could...
I have 3 classes: The first: <daml:Class rdf:ID="Concept"> <rdfs:label>Concept</rdfs:label> </daml:Class> the second: <daml:Class rdf:ID="Component"> ...
Hi, This is a limitation of the current implementation. The DAML loader will inspect each resource to see what is the appropriate abstraction to use to model...
Specifically, since a Component is a sub-class of Concept, any instance of Component you create will also have (by extension) rdf:type Concept. So I'm not...
... Well, as I said before in the current implementation no object will ever be listed by both listDAMLClasses() and listDAMLInstances(); they're wholly ...
Liu Song - I believe that the problem here is that you have declared the range of the hasConstraint property to be a list, whereas the range of the daml:range ...
Liu Song - The current version of DAML+OIL support in Jena is very limited with respect to inference. A key goal of the new architecture is to provide the...
Hi Ed, ... Jena, I think. I haven't done an in-depth investigation, but from memory the list code checks to see that a well-formed list is rdf:type daml:List,...
Thank you for you help. I use DAML:List as the range of property because I want to create an ontology like this: hasConstraint is a property. ConstraintRules...
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Justo Ruiz
justo.ruiz@...
Oct 2, 2002 7:19 pm
All, I am trying to port Jena/RDB to MS SQL 2000 for testing purposes. I managed to create a new "Generic/Generic" SQL Script, which is being successfully...
Hi, Im having a hard time getting jena 1.5, SleepyCat db and tomcat 4.1 to work together. Ive put the db.jar that sleepycat makes almost everywhere in the...
... I haven't run this with tomcat, but maybe this will help. When I run the jvm I have -Djava.library.path=directoryOfBDBLibaray on the command line. This...
I have run Jena inside Tomcat4 with BDB files: I put a directory on the path (that is the PATH, not the CLASSPATH). You need various files: the BDB engine and...
... Great. ... Hard to see what the problem is without more details. This in "addLiteral", it looks like it has successfully allocated an ID against which to...
Theunis de Jongh did a port to SQL Server and put the files up at http://openbdg.epiuse.net, that might help solve your problems. Sorry I should have...
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Justo Ruiz
justo.ruiz@...
Oct 3, 2002 5:08 pm
Thanks for your comments. I'll double check it... If I manage to get it working, I will post the SQL Scripts. :-) Cheers, Justo. ... From: Dave Reynolds...
Thanks for the help with the JNI for Sleepycat - Im sure one of the suggesions will work Im trying to search all the literials of the db (fulltext search...
Hi Ryan, The match you are doing is a regular expression search for the substring "Africa". [If you just want literals that are "Africa" you can use (?s , ?p ...
One other option you have is to use the RDB backdoor ModelRDB.createConstraints(). This has lots of limitations so it may not help much. All it does is allow...
... I've looked into this now (thanks for pointing it out) and it is serious - not only are the trailing spaces lost but that can lead to NullPointer...
I have a class like this: <daml:Class rdf:ID="Antenna"> <rdf:type> <daml:Class rdf:about="#Concept" /> </rdf:type> <rdfs:label>Antenna</rdfs:label> ...
... Hi, such a translator is part of TRIPLE (triple.semanticweb.org): it translates DAML+OIL ontologies (taxonomy only) into the XML format that can be read ...
Sorry for the delay to respond. Surely I can have a go at "stress- testing" Jena. Just let me know what and when :) -- Janne ... the code ... statement ... ...
Janne, I have looked at code and it does check the query aborted flag (it happens in TriplePattern.BindingIterator.hasNext()) and it does .close() the ...
