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Blogs
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Bug in SPARQL Optimisation
I've recently discovered a subtle bug in my SPARQL optimisation which means queries of the following form may fail unexpectedly or not return correct results:
SELECT * WHERE {?s ?p ?o . FILTER(...)} LIMIT 10
This only applies to queries where there ...
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dotNetRDF 0.2.0 Alpha Released
We've just released the latest Alpha of dotNetRDF which is Version 0.2.0 (official build number is 0.2.0.27063). This represents a major step forward in the dotNetRDF though as a result introduces a large number of breaking API changes relative to the 0....
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dotNetRDF 0.6.0 Released
We're pleased to announce the 0.6.0 release of the dotNetRDF API - you can get this by going to Download dotNetRDF or obtain full source code by going to Download dotNetRDF Source.
This release is a major feature release of the library which includes a...
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dotNetRDF 0.7.2 Beta Released
We're please to announce the availability of dotNetRDF 0.7.2 Beta, this is a minor feature and bug fix release and can be downloaded by going to Download dotNetRDF. Full source code is available via Download dotNetRDF Source or from our Mercurial Reposit...
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Experimenting with MongoDB as an RDF Store
So I tweeted the other week about the fact that I'd be playing with using MongoDB as an RDF Store and since there's been quite a lot of interest in that this blog post aims to cover where I've got to so far. If you have any comments/suggestions/ideas on ...
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Full Text SPARQL Support released
We've just made the first Alpha release of our Full Text SPARQL support, this uses Lucene.Net to provide full text SPARQL query functionality.
You can find the additional library and dependencies under Query/FullText in the standard distribution obtain...
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Improving SPARQL Performance in dotNetRDF or why sometimes you have to throw stuff out
So I recently tweeted about the new benchmarking results I was generating for dotNetRDF which showed a massive improvement in performance and linear scaling. Gregory Williams asked about whether I was going to do a write up so here it is.
Firstly some...
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Latest SPARQL 1.1 Drafts out
The W3C DAWG just published the latest drafts of the SPARQL 1.1 specifications. The part of real interest to me is the Query specification, in the latest draft they've introduced a couple of nice things:
SAMPLE Aggregate
The new SAMPLE aggregate whic...
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Work in Progress - SPARQL Features and Performance
So one of my favourite aspects of the library is the SPARQL engine - I fully admit it's not the best out there but it's becoming increasingly powerful as I implement more and more of the SPARQL 1.1 specification and I continue to come up with ways to opti...
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CMS
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Advanced SPARQL Operations
Learn about various advanced SPARQL functionality
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Configuration API - Datasets
Learn how to use the Configuration API to configure Datasets
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Configuration API - Expression Factories
Learn how to use the Configuration API to specify Expression Factories in dotNetRDF
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Configuration API - Full Text Query
Learn how to use the Configuration API to specify Full Text Query functionality in dotNetRDF
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Configuration API - HTTP Handlers
Learn how to use the Configuration API to specify HTTP Handlers in dotNetRDF
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Configuration API - Optimisers
Learn how to use the Configuration API to specify Optimisers in dotNetRDF
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Configuration API - Protocol Processors
Learn how to use the Configuration API to specify Protocl Processors in dotNetRDF
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Configuration API - Query Processors
Learn how to use the Configuration API to specify Query Processors in dotNetRDF
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Configuration API - SPARQL Endpoints
Configuration API - SPARQL Endpoints
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Configuration API - Update Processors
Learn how to use the Configuration API to specify Update Processors in dotNetRDF
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