About me
My name is Richard Cyganiak.
I'm a software engineer at TopQuadrant. I work on web technologies for managing data and am based in Dublin, Ireland.Links
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Category Archives: Semantic Web
URIs have a namespace part and a local part, right?
This is a technical post on the way URIs break down into “namespace parts” and “local parts” in RDF. It was prompted by this comment in a recent discussion: In a URI, the namespace part ends with the last slash … Continue reading
Posted in General, Semantic Web
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The RDF 1.1 Literal Quiz
Let’s pretend we live in January 2013, and RDF 1.1 has just been published. This including the RDF Working Group’s attempt to clean up string literals. The issue with string literals is that RDF currently offers three different ways for … Continue reading
Posted in Semantic Web
1 Comment
prefix.cc, MkII
prefix.cc is a website I’ve made last February to ease a very common task in the life of RDF developers and SPARQL users: looking up namespace URIs. A short summary of what the site can do for you is available … Continue reading
Posted in General, Semantic Web
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What’s in a name? And the Linked Data Police
So I wrote a rather angry private email to Erik Wilde a few days ago, complaining about his use of the term “linked data” for a site that doesn’t follow the linked data practices. Erik decided to publish my email … Continue reading
Posted in General, Semantic Web
7 Comments
Linked data at the New York Times: Exciting, but buggy
Update: Evan Sandhaus reports that all the issues mentioned below will be fixed. Great! Yesterday at the International Semantic Web Conference, Evan Sandhaus of the New York Times unveiled data.nytimes.com, a site that publishes linked data for some parts of … Continue reading
Posted in General, Semantic Web
10 Comments
Back from ESWC 2008
The European Semantic Web Conference is over and I’m back in Galway. It was a lot of fun, two hundred smart and interesting people in a sea-side tourist resort, and the thought “I can’t believe I’m getting paid for this” … Continue reading
Posted in General, Semantic Web
2 Comments
What is your RDF browser’s Accept header?
I was debugging some content negotiation related issue the other day and made a little tool that allows me to find out what Accept header different RDF-aware HTTP clients send. If you ever need to know the Accept header of … Continue reading
Posted in General, Semantic Web
7 Comments
Tabulator does N3
In my podcasted chat with Danny Ayers the other day I said that Tabulator doesn’t support N3, the highly readable RDF serialization syntax developed by Tim Berners-Lee. It turns out I was wrong. I thought Tabulator supported RDF/XML only. But … Continue reading
Posted in General, Semantic Web
6 Comments
A challenge for semantic query wizards
Bernard Vatant: A challenge for semantic query wizzards: Find the smallest connected graph having at least a node in each LOD data set Interesting. The hardest part might be finding paths through the FOAF bubble. Any takers?
Posted in General, Semantic Web
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Finding Rahoon
Rahoon is a nondescript area of Galway, the third-largest city in the Republic of Ireland. Unsurprisingly, I had never heard about Rahoon before last week, when I moved there, to join Giovanni Tummarello’s team at DERI Galway. Moving is stressful. … Continue reading
Posted in General, Semantic Web
12 Comments