Hi Rob, These issues are scheduled to be looked into next week ...
Best Regards Hugh Williams Professional Services OpenLink Software Web: http://www.openlinksw.com Support: http://support.openlinksw.com Forums: http://boards.openlinksw.com/support Twitter: http://twitter.com/OpenLink On 4 Feb 2011, at 11:49, Rob Vesse wrote: > Hi Hugh > > Any news on this yet? > > Thanks, > > Rob > > From: "Hugh Williams" <hwilli...@openlinksw.com> > Sent: 26 January 2011 17:45 > To: rve...@vdesign-studios.com > Subject: Re: [Virtuoso-users] Missing datatypes using ADO.NET > > Hi Rob, > > OK, we are currently looking into these reported issues and shall report back > with our findings ... > > Best Regards > Hugh Williams > Professional Services > OpenLink Software > Web: http://www.openlinksw.com > Support: http://support.openlinksw.com > Forums: http://boards.openlinksw.com/support > Twitter: http://twitter.com/OpenLink > > On 26 Jan 2011, at 14:04, Rob Vesse wrote: > >> Hi Hugh >> >> I can confirm that the same issue still happens in my code as well (thought >> it was fixed ages ago :-( ). The sample application is no use as a >> reference since it only messes about with SqlExtendedStrings for IRIs and >> does nothing with non-IRI types other than call ToString() on them (either >> explicitly or implicitly when displaying them). >> >> The problem seems to be that things are being returned as Strings rather >> than as appropriate .Net types. The only RDF datatypes I can get back >> properly are those with custom datatypes - standard types like Integers, >> Booleans, Date Times etc all come back as plain strings instead of as >> SqlRdfBox or an appropriate .Net type. Literals with language tags do get >> returned correctly though. >> >> I remember bringing up this issue back in April 2010 and I had thought it >> was fixed but it appears not. This issue is a major pain for people using >> Virtuoso's ADO.Net support whether directly or indirectly via a library like >> mine so please can your developers look into this again asap. >> >> Cheers, >> Rob >> >> P.S. If you finally fix the booleans to integers thing I will be eternally >> grateful especially if you fix the above as well >> >> From: "Hugh Williams" <hwilli...@openlinksw.com> >> Sent: 26 January 2011 13:45 >> To: "Moritz Eberl" <eberl.mor...@googlemail.com> >> Subject: Re: [Virtuoso-users] Missing datatypes using ADO.NET >> >> Hi Moritz, >> >> As a starting point are you able to get the sample walkthrough SPASQL >> application we have at: >> >> >> http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/VirtSPASQLWinFormApp >> >> working ? >> >> The booleans being mapped to integers is a known issue that is scheduled to >> be fixed in a future/next release ... >> >> Best Regards >> Hugh Williams >> Professional Services >> OpenLink Software >> Web: http://www.openlinksw.com >> Support: http://support.openlinksw.com >> Forums: http://boards.openlinksw.com/support >> Twitter: http://twitter.com/OpenLink >> >> On 26 Jan 2011, at 13:12, Moritz Eberl wrote: >> >>> Hello Rob, >>> >>> currently i do not use any API. I first wanted to be able to get the RDF >>> data with basic SPARQL queries. >>> While trying to figure out what i was doing wrong, i also used your API. >>> The results where pretty much the same. All typed literals were returned as >>> strings. >>> >>> You are right about the boolean datatype in Virtuoso. I just tried to store >>> a xsd:boolean, which resulted in a xsd:integer using the RDF/XML >>> representation. >>> >>> Cheers, >>> Moritz >>> >>> Am 26.01.2011 13:03, schrieb Rob Vesse: >>>> >>>> Hi Moritz >>>> >>>> What API are you using to manipulate the RDF within your application or >>>> have you rolled your own? >>>> >>>> My API dotNetRDF (http://www.dotnetrdf.org) has Virtuoso integration built >>>> in and might be helpful to you as it handles all the data type retrieval >>>> appropriately. I've had isolated reports that on some machines things >>>> don't come back correctly and I know that it was an issue with older 6.x >>>> releases of Virtuoso (though should be fine in the version you're using). >>>> >>>> One think to note about datatypes is that in my experience Virtuoso >>>> doesn't return all datatypes correctly even when you do a SPASQL select >>>> like you've done and do all the type handling. If my memory serves me >>>> this particularly applies to xsd:boolean typed literals which come back as >>>> a 1/0 rather than a true/false though if you do a CONSTRUCT over the same >>>> data the type does come back correctly. >>>> >>>> Regards, >>>> >>>> Rob Vesse >>>> >>>> From: "Moritz Eberl" <eberl.mor...@googlemail.com> >>>> Sent: 26 January 2011 11:51 >>>> To: virtuoso-users@lists.sourceforge.net >>>> Subject: [Virtuoso-users] Missing datatypes using ADO.NET >>>> >>>> Hello, >>>> >>>> i am trying to use Virtuoso as RDF store for a C# application with .Net >>>> 4, but i have some issues with the ADO.NET library. I have no troubles >>>> creating triples with SPARQL using SPASQL, but the retrieval is >>>> problematic. In the result set, all typed literals are strings without >>>> type information. I get the IRI as SqlExtendedString and the literals >>>> with language information as SqlRdfBox, so no problem there. Now i am >>>> wondering what i'm doing wrong. >>>> This is how i access the data: >>>> >>>> DataTable results = new DataTable(); >>>> results.Columns.Add("s", typeof(System.Object)); >>>> results.Columns.Add("p",typeof(System.Object)); >>>> results.Columns.Add("o", typeof(System.Object)); >>>> VirtuosoCommand cmd = Connection.CreateCommand(); >>>> cmd.CommandText = "SPARQL select * where {?s ?p ?o.}"; //just an example >>>> here >>>> VirtuosoDataAdapter adapter = new VirtuosoDataAdapter(cmd); >>>> adapter.Fill(results); >>>> >>>> I also tried to use the RDF/XML output, although not optimal >>>> performance-wise, it kind of worked. One thing i noticed though, was >>>> that ASK statments produce malformed XML. >>>> As example, this statment >>>> SPARQL define output:format "RDF/XML" ask where {?s ?p ?o.}; >>>> produced >>>> >>>> xmlns:rs="http://www.w3.org/2005/sparql-results#"; >>>> xmlns:xsd="http://www.w3.org/2001/XMLSchema#"; > >>>> >>>> >>>> rdf:datatype="http://www.w3.org/2001/XMLSchema#boolean";>1 >>>> >>>> >>>> The prefix of the closing result tag is missing. You can try it in the >>>> Interactive SQL form of the conductor. >>>> >>>> My system specs: >>>> OS: Windows 7 64-bit >>>> Virtuoso: Open-Source-Edition Version 06.01.3127 - Build Jul 9 2010 32-bit >>>> virtado3.dll: Version 6.2.3128.1 >>>> >>>> It would be great if somebody could help me to resolve my issues. >>>> >>>> Cheers, >>>> Moritz >>>> >>>> ------------------------------------------------------------------------------ >>>> Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! >>>> Finally, a world-class log management solution at an even better >>>> price-free! >>>> Download using promo code Free_Logger_4_Dev2Dev. Offer expires >>>> February 28th, so secure your free ArcSight Logger TODAY! >>>> http://p.sf.net/sfu/arcsight-sfd2d >>>> _______________________________________________ >>>> Virtuoso-users mailing list >>>> Virtuoso-users@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/virtuoso-users >>>> >>> >>> ------------------------------------------------------------------------------ >>> Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! >>> Finally, a world-class log management solution at an even better price-free! >>> Download using promo code Free_Logger_4_Dev2Dev. Offer expires >>> February 28th, so secure your free ArcSight Logger TODAY! >>> http://p.sf.net/sfu/arcsight-sfd2d_______________________________________________ >>> Virtuoso-users mailing list >>> Virtuoso-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/virtuoso-users >> >> >> ------------------------------------------------------------------------------ >> Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! >> Finally, a world-class log management solution at an even better price-free! >> Download using promo code Free_Logger_4_Dev2Dev. Offer expires >> February 28th, so secure your free ArcSight Logger TODAY! >> http://p.sf.net/sfu/arcsight-sfd2d_______________________________________________ >> Virtuoso-users mailing list >> Virtuoso-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/virtuoso-users > >
