dotnetrdf-support Mailing List for dotNetRDF (Page 8)

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[dotNetRDF-Support] Only receiving unique objects?

From: dshugars d. <dsh...@um...> - 2013-12-02 15:29:56

Running the following code:
            var g = new Graph();

            UriLoader.Load(g, new Uri("http://dbpedia.org/page/Tetris"));

            //Get all Triples which meet some criteria
            //Want to find everything that is rdf:type
            IUriNode rdfType = g.CreateUriNode("rdfs:label");

            var ts = g.GetTriplesWithPredicate(rdfType);

and looking at the ts object which has 4 items.
However, looking at the raw rdf, there appears to be more than 4 that
should be returned.

The only pattern that I seem to see is that the objects are essentially the
same value but with different languages.
Is there a way to get all of the values?  By my count there should be 12
values returned.

Thanks in advance.
David Shugars

Re: [dotNetRDF-Support] Special Characters in ResultSets with SPARQL and URILoader.Load

From: Rob V. <rv...@do...> - 2013-11-22 09:50:52

Hi Frank

This is not a bug in dotNetRDF per se rather a quirk of how it serialises
URIs to maximise the round tripping potential of URIs and prevent possible
data corruption.

We use the .Net Uri class which stores both the original string and the
actual URI representation I.e. the version with the percent encoded
characters.  When we serialise URIs we always use the AbsoluteUri property
of the Uri object which uses the percent encoded representation, this is
the most reliable way to serialise the URI since it avoids some subtle
interpretation issues when that URI is parsed back in by ourselves or
other tools.

You can always access the Uri and get the raw representation if you so
desire, the following is a modified version of your example which prints
the ToString() form dotNetRDF uses and then accesses the Uri object and
uses its ToString() method which writes the original version of the string.

IGraph g = new Graph();
            UriLoader.Load(g, new
Uri("http://de.dbpedia.org/resource/Disillusion"));

            INodeFormatter formatter = new TurtleW3CFormatter();
            foreach (INode p in g.Triples.Select(t =>
t.Predicate).Distinct())
            {
  Console.WriteLine("ToString() = " + p.ToString());
  Console.WriteLine("URI ToString() = " + ((IUriNode)p).Uri.ToString());
            }

Btw note that .Net uses URI rules not IRI rules so it will always consider
URIs like the one in your example to need percent encoding.  You can try
enabling .Net's IRI parsing support
(http://msdn.microsoft.com/en-us/library/bb968786(v=vs.110).aspx) if you
wish but I'm not sure that it'll necessarily make any difference.

Regards,

Rob Vesse



On 19/11/2013 18:49, "Frank Schumacher" <fs...@in...>
wrote:

>Hi folks,
>
>I started to experiment with dotnetrdf and stumbled upon the first
>problem, that I was unable to find a solution using the given resources.
>So I hope I can find some help here.
>
>The problem is simple to explain: Special characters in URIs like german
>Umlaute ö, ä or ü are replaced by Escape Sequences. i.e.: The URI
>http://de.dbpedia.org/property/gründer1a becomes
>http://de.dbpedia.org/property/gr%C3%BCnder1a
>
>How can I get the URIs with the special chars and no escape sequences?
>When I query the SPARQL-Endpoint via the webinterface, I get the special
>characters as expected, so I guess the problem is within dotnetrdf.
>
>Here are my testfunctions, which return the "broken" URIs:
>
>
> >>> For URILoader >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>private void Test2()
>{
>	IGraph g = new Graph();
>	UriLoader.Load(g, new Uri("http://de.dbpedia.org/resource/Disillusion"));
>
>	foreach (Triple t in g.Triples)
>	{
>		Console.WriteLine(t.ToString());
>	}
>}
><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>
> >>> For SPARQL >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>private void Test5()
>{
>	SparqlRemoteEndpoint endpoint = new SparqlRemoteEndpoint(new
>Uri("http://de.dbpedia.org/sparql"), "http://de.dbpedia.org");
>
>	SparqlResultSet results = endpoint.QueryWithResultSet("select distinct
>* where {<http://de.dbpedia.org/resource/Disillusion> ?p ?o}");
>
>	foreach (SparqlResult result in results)
>	{
>		INode n;
>
>		if (result.TryGetValue("p", out n))
>		{
>			Console.WriteLine(n.ToString());
>		}
>	}
>}
><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>
>Thanks in advance,
>Frank
>-- 
>************************************************
>* Universität Leipzig, Institut für Informatik *
>*  Abteilung Betriebliche Informationssysteme  *
>*     http://bis.informatik.uni-leipzig.de     *
>*            Tel.: 0341 / 97 32 256            *
>*                                              *
>* ========== Opera Metal: molllust =========== *
>*           http://www.molllust.com            *
>*          M'era Luna Newcomer 2013!           *
>************************************************
>
>--------------------------------------------------------------------------
>----
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>k
>_______________________________________________
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>dot...@li...
>https://lists.sourceforge.net/lists/listinfo/dotnetrdf-support

[dotNetRDF-Support] Special Characters in ResultSets with SPARQL and URILoader.Load

From: Frank S. <fs...@in...> - 2013-11-19 18:49:36

Hi folks,

I started to experiment with dotnetrdf and stumbled upon the first 
problem, that I was unable to find a solution using the given resources. 
So I hope I can find some help here.

The problem is simple to explain: Special characters in URIs like german 
Umlaute ö, ä or ü are replaced by Escape Sequences. i.e.: The URI 
http://de.dbpedia.org/property/gründer1a becomes
http://de.dbpedia.org/property/gr%C3%BCnder1a

How can I get the URIs with the special chars and no escape sequences? 
When I query the SPARQL-Endpoint via the webinterface, I get the special 
characters as expected, so I guess the problem is within dotnetrdf.

Here are my testfunctions, which return the "broken" URIs:


 >>> For URILoader >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
private void Test2()
{
	IGraph g = new Graph();
	UriLoader.Load(g, new Uri("http://de.dbpedia.org/resource/Disillusion"));

	foreach (Triple t in g.Triples)
	{
		Console.WriteLine(t.ToString());
	}
}
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

 >>> For SPARQL >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
private void Test5()
{
	SparqlRemoteEndpoint endpoint = new SparqlRemoteEndpoint(new 
Uri("http://de.dbpedia.org/sparql"), "http://de.dbpedia.org");

	SparqlResultSet results = endpoint.QueryWithResultSet("select distinct 
* where {<http://de.dbpedia.org/resource/Disillusion> ?p ?o}");

	foreach (SparqlResult result in results)
	{
		INode n;

		if (result.TryGetValue("p", out n))
		{
			Console.WriteLine(n.ToString());
		}
	}
}
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

Thanks in advance,
Frank
-- 
************************************************
* Universität Leipzig, Institut für Informatik *
*  Abteilung Betriebliche Informationssysteme  *
*     http://bis.informatik.uni-leipzig.de     *
*            Tel.: 0341 / 97 32 256            *
*                                              *
* ========== Opera Metal: molllust =========== *
*           http://www.molllust.com            *
*          M'era Luna Newcomer 2013!           *
************************************************

Re: [dotNetRDF-Support] dotNetRDF 1.02 source

From: Miguel S. <mig...@ua...> - 2013-11-18 14:08:20

Hi Rob Vesse,


Thanks, will do!


Cheers, Miguel Santos


________________________________
From: Rob Vesse <rv...@do...>
Sent: Monday, November 18, 2013 11:36 AM
To: Miguel Santos
Cc: dotNetRDF User Help and Support
Subject: Re: dotNetRDF 1.02 source

Hey Miguel

Thanks for spotting the error, this should now be corrected.

It's always nice to hear that our work is appreciated, if you run into any further issues please let us know via the mailing lists so the whole community can benefit from our answers.

Cheers,

Rob Vesse

From: Miguel Santos <mig...@ua...<mailto:mig...@ua...>>
Date: Saturday, 16 November 2013 08:20
To: Rob Vesse <rv...@do...<mailto:rv...@do...>>
Subject: dotNetRDF 1.02 source


Hello Rob Vesse,



Thank you so much for your work on the dotNetRDF library. It's a great toolset and I'm currently using it on my Master's degree thesis.



This message to let you know that the download link for the source (http://www.dotnetrdf.org/content.asp?pageID=Download dotNetRDF Source) currently points to version 1.01, even though the link for the binaries points to version 1.02.

I was able to find the source at http://www.dotnetrdf.org/downloads/dotnetrdf_library_source_102_stable.zip, but thought I'd let you know about this issue.

Best regards,
Miguel Santos

Re: [dotNetRDF-Support] dotNetRDF 1.02 source

From: Rob V. <rv...@do...> - 2013-11-18 11:38:10

Hey Miguel

Thanks for spotting the error, this should now be corrected.

It's always nice to hear that our work is appreciated, if you run into any
further issues please let us know via the mailing lists so the whole
community can benefit from our answers.

Cheers,

Rob Vesse

From:  Miguel Santos <mig...@ua...>
Date:  Saturday, 16 November 2013 08:20
To:  Rob Vesse <rv...@do...>
Subject:  dotNetRDF 1.02 source

> Hello Rob Vesse,
> 
>  
> 
> Thank you so much for your work on the dotNetRDF library. It's a great toolset
> and I'm currently using it on my Master's degree thesis.
> 
>  
> 
> This message to let you know that the download link for the source
> (http://www.dotnetrdf.org/content.asp?pageID=Download dotNetRDF Source)
> currently points to version 1.01, even though the link for the binaries points
> to version 1.02.
> 
> I was able to find the source at
> http://www.dotnetrdf.org/downloads/dotnetrdf_library_source_102_stable.zip,
> but thought I'd let you know about this issue.
> 
> Best regards,
> Miguel Santos
>

[dotNetRDF-Support] dotNetRDF 1.0.2 Released

From: Rob V. <rv...@do...> - 2013-11-18 11:35:27

Hi All

Just prior to the weekend we released dotNetRDF 1.0.2 which is a minor bug
fix release, it fixes the following important bugs:
* CORE-378  OOM when parsing large RDF/XML inputs
* VIRT-383  In some cases Virtuoso transactions are not cleaned up
* Portable Class Library builds were not included in NuGet packages
The release is available via all the usual avenues  dotNetRDF website [1],
SourceForge [2], BitBucket [3], CodePlex [4] and NuGet

Thanks as always to everyone who submitted bug reports and code
contributions,

Regards,

Rob Vesse

[1] http://www.dotnetrdf.org/content.asp?pageID=Download
[2] http://sourceforge.net/projects/dotnetrdf
[3] http://bitbucket.org/dotnetrdf/dotnetrdf/downloads
[4] http://dotnetrdf.codeplex.com

[dotNetRDF-Support] dotNetRDF 1.0.1 Released

From: Rob V. <rv...@do...> - 2013-10-10 16:03:33

Hi All

We're pleased to announce the long overdue release of dotNetRDF 1.0.1, this
is available through all the usual channels  (SourceForge [1], CodePlex [2],
BitBucket [3], Project Website [4]) and via NuGet packages

This is primarily a maintenance and bug fix release with some minor new
features such as Portable Class Library builds and Stardog 2.0 support.  You
can read the blog post for this release at [5].

Thanks as always to everyone who reported bugs, submitted patches or
otherwise helped out with the release

Best Regards,

Rob Vesse

[1] http://sourceforge.net/projects/dotnetrdf
[2] http://dotnetrdf.codeplex.com
[3] https://bitbucket.org/dotnetrdf/dotnetrdf/downloads
[4] http://www.dotnetrdf.org/content.asp?pageID=Download
[5] http://www.dotnetrdf.org/blogitem.asp?blogID=76