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.
Category Archives: General
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
There’s a lot of discussion recently around HTML5’s microdata proposal, and how it relates to W3C’s earlier RDFa standard that is currently being updated for HTML5. Microdata solves many of the use cases of RDFa in a much simpler way. … Continue reading
With tools like Neologism and OpenVocab, creating an RDF vocabulary is easy. But if your goal is re-use within a wider community, you will face many questions that are not so easy to answer: How much work is it going … Continue reading
Well, they are not always harmful. But most of the time. I’ll get to that in a minute. On the firstname.lastname@example.org list, W3C’s Sandro Hawke has a lucid and concise summary of the problems with blank nodes in RDF. It’s … Continue reading
I run prefix.cc, a website for RDF developers where anyone can register and look up the expansion URIs for namespace prefixes such as foaf, dc, qb or void. The site tracks which prefixes gets looked up most often. This allows … Continue reading
This weblog has become quiet. These days, most of my word count goes into mailing lists, Twitter, and way too much personal email. Over here on the blog, cobwebs are gathering and some signs of bitrot have become evident. So … Continue reading
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
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
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
Java version management on OS X is a wee bit complicated. Here’s what I understand. All different versions of Java are installed into the directory: /System/Library/Frameworks/JavaVM.framework/Versions/ For example, the JDK home directory for 1.4.2 would be Versions/1.4.2/Home/. There are three … Continue reading