Jeroen Reijn

on Tech, Open Source and software development

Content mangement and the semantic web

I came across the term ‘semantic web’ a couple of years ago, when one of the original creators of Apache Cocoon went of to work on the SIMILE Project at MIT. I didn’t pay much attention to the concept of ‘semantic web’ back then, because I just started learning Apache Cocoon and still had a lot to learn.But over the last couple of months I’ve been doing some research on the currently available standards for providing semantic data on the web with a strong focus on RDFa.

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Apache Cocoon and Javascript minification

A couple of days ago somebody on the Apache Cocoon user list send a message to the mailing-list about on the fly minification of for instance Javascript files. This topic has been quite popular over the past years, since web application have become richer and Javascript files have become larger.

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Japanese and Java resource bundles

At Hippo we have a project, which is build with Java Server Faces, for which I occasionally do some maintenance. A while ago I had an issue in our JIRA bug tracker that reported an error for the Japanese version of the website. The error came from a component that reads information from a resource bundle properties file, which is stored on the local filesystem. In this case from the Japanese version of the resource bundle (, which is used by the web application to display some Japanese labels.

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JCR: Sorting on child node properties

A JCR repository, like Apache Jackrabbit (basis for Hippo CMS 7’s content repository), mainly consists of nodes and properties. As described in the JCR specification, a Java Content Repository should support 2 different query syntaxes: XPath and SQL. Once you get the hang of the syntax, performing a search on a JCR repository is quite easy, but today I came into a situation where I was not able perform the query I wanted. In this post I’ll try to describe what my problem was and how the same result can still be achieved.

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Mozilla lightning in Ubuntu Jaunty

I just did a fresh install of Ubuntu Jaunty Jackalope(9.04). After reinstalling Thunderbird (my favorite mail client), I was unable to see my Google calendars with Thunderbirds Lightning extension.

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