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This weekend I spent time on preparing for the ODF Plugfest again. The test software ODFAutoTests now has many more tests. Most new tests are for text styles. I've created tests for each of the possible attributes in <style:text-properties/>. Read More

In two weeks time, users and developers of OpenDocument Format software will meet up for a two day ODF plugfest in London. In preparation of the plugfest, I have spent last weekend, refreshing ODFAutoTests. Read More

make does it, Haskell does it, spreadsheets do it, QML can do it and below I explain how to do it with C++11: declarative programming. And not just any declarative programming, but my favorite kind: lazy evaluation. Read More

The office suite Calligra can save many file formats, but the main one is OpenDocument Format. With a proposed improvement, it can be easier than ever to code on Calligra. Read More

Last year I skipped Akademy and felt sorry about that. So this year I simply have to go. It will be great to immerse in the talks about and related to KDE. Read More

I've been looking into how easy it is to confirm that a binary package corresponds to a source package. It turns out that it is not easy at all. So I've written down my findings in this blog entry. Read More

What backup tool are you using? You are using one, right? I am using one these days, namely git. My entire home directory is collection of git repositories. Using git for backups is great because it is easy to synchronize data. Read More

Today the WebODF project released an Android app. You can get it from the Android Market and soon from FDroid.org. This is just the start. Viewing and editing office documents and in particular ODF files should be possible on all mobile devices. Read More

Today I wrote a file selector in QML. This was not trivial because QML has no standard element for drilling down in a tree model. So I wrote one. A bit of Python was needed to expose the file system to the QML as a data model. Read More

ODF support on phones and tablets is not good right now. Work is being done to improve this by the Calligra project, but WebODF can provide a solution too. To prove this, I built a small wrapper application that gives Android the ability to read ODF files. Read More

In my previous blog I talked about converting ODF files to PDF files with WebODF. This is a functionality that is generally useful, but is also one that lets OfficeShots compare WebODFs ODF rendering to that of other office suites. Read More

It is quite common that one wants to send ODF files to people that lack the software to display ODF. One workaround is to convert the ODF to PDF. Most office suites that support ODF can export to PDF. Read More

The yearly FOSDEM was excellent as always. I could not attend all talks; mine was on sunday afternoon and as usual I was still improving it at the conference itself. Nevertheless, I spoke with many people and saw some very good presentations. Read More

Currently I am enjoying FOSDEM, the excellen Free Software conference in Brussels. Tomorrow I will give a presentation "WebODF: an office suite built on browser technology" about WebODF. If you want a preview, you can look at a screencast about it. Read More

The programming language JavaScript is seeing more and more use. Software written in it can run in many different environments. Not only do web browsers support it, there are quite a few programming environments that can integrate and run JavaScript code. Read More

Today was a day of style in the OdfKit Hack Week. Enjoying the sun with style. Watching a soccer game with style. Watching the chicken spagetti races with style and most importantly adding a touch of style to OdfKit cum suis. Read More

It's Friday and day three of the OdfKit Hack Week. So what did we do all day besides folding balloons, talking to men in wooden shoes and eating pancakes? We actually implemented the style inheritance I blogged about yesterday. Read More

Today is day 1 of of the OdfKit Hack Week. We wrote a list of things we want to achieve this week. In order to avoid embarrassment, we'll spare you the details and go straight through to an explanation of how you can use WebKit (or any modern browser) to visualize ODF documents. Read More

OdfKit is a project that reuses WebKit technology in a toolkit for working with ODF office documents. KO GmbH is sponsored by NLnet to work on OdfKit for three months. This week, Chani, who is on her way to Akademy, is working with me on OdfKit and since she's here an entire week, we're calling it OdfKit Hack Week. Read More

A couple of large commits changed the organization of the Strigi project. As you probably know, Strigi provides the code to extract data from files and also allows for fast searching for files. Read More

Rendering slides is a complicated business. Slides can contain tons of different features just like webpages can. People expect that presentations look the same in different programs. Perhaps not pixel-perfect but very similar nevertheless. Read More

Tonight I could not attend band rehearsal so I used the time to play with the new QML language. There is a nice tutorial online and a good screencast. QML allows one to write flashy applications with little code. Read More

Today, Nokia released the first public version of the office document viewer for the Nokia N900 phone. It was uploaded to the Maemo repositories. This version supports text files, spreadsheets and presentations in OpenDocument format (ODF) and Microsoft Office formats. Read More

This is just a quick note to tell the world about the newest Strigi release. It has version number 0.7.1 and is the recommended Strigi version for use with KDE 4. Read More

Being able to properly read many different file formats is important for KOffice success. By 'read', I mean 'convert to ODF' because the conversion and reading is strictly separated in KOffice. Read More

For mirroring my backup drive, central data store for devices, music playing and a webserver for experiments, I'd like to run a small server at home. I want this server to be energy efficient, easy to modify, robust, silent and run customizable free software. Read More

This weekend I visited my parents in law, because my wifes paternal grandmother celebrated her 90th birthday. I noticed that the laptop they use was still running Kubuntu Feisty with OpenOffice 2. Read More

One important feature for photo management is missing in the FOSS world:an application for creating photo albums that can be sent away for printing at a printing service. There is however a pretty slick closed source application that works on linux. Read More

You may remember two of my recent blogs. One was about a project to parse powerpoint files and another one was about porting hexdump to the browser. So how about a combination of those two topics: parsing powerpoint files in the browser. Read More

Nokia has been kind enough for lending me an awesome N900. This will allow me to test KOffice on the phone. Document loading, parsing and scrolling speed could do with improvements. Read More

This morning, I thought: why is XMLHttpReq for xml and text but not for binary files? It turns out you can use it for binary files, but not in each browser and only for remote files. Read More

KOffice has the potential to be a widely used office suite. One of the requirements for user adoption is good support for popular file formats and most presentations are available as Powerpoint presentations. Read More

While sipping from a Vignes de Nicole and nibbiling on some Heukäse, I am thinking about Wine. Not the liquid version, but the software project. As a reader of Linux Weekly News, I noticed that the Wine project makes very frequent releases. Read More

This weekend I have been bitten by some singletons. They have annoyed me so much that I am writing this blog about them. I will expose the singleton as a dangerous construct. Read More

The Desktop Summit in Gran Canaria is very enjoyable. The conference center is very luxurious. It comes with uniformed assistants in every presentation room helping by changing the name signs and refreshing the water. Read More

Today is the first day of my employment at a wonderful company called KO GmbH. KO GmbH provides services around software dealing with office documents, notably KOffice. I'm excited to have found such an inspiring job working in Free Software. Read More

The first episode of 'programming in SVG' led to some nice bling improvements in KDE. Aaron showed how to put an SVG program in a plasmoid and Ariya taught us the incantation to make the desktop shine through such a plasmoid. Read More

Recently I received positive feedback on my program CubeTest. The program is being used in primary schools to help children to achieve better spatial insight. There is a teachers manual on-line. Read More

I just added some content to the new cute Qt community website.

In a recent blog, David Nolden talks about transferring user-generated, file associated meta-data. His post was well written and the ensuing discussion interesting. I'd like to continue his line of thought here. Read More

ArchiveReader is a class in libstreams that allows you to open files embedded in zip, deb, rpm, jar, openoffice, and email files. It is used in the kio slave jstreams:/. This class works like this: Read More

Another epic owl release! Granted, not as epic as Eigen 2.0, but still very nice. Strigi 0.6.4 gives some nice index speed-ups and fixes a few annoying bugs. There is one new feature: LZMA support. Read More

LZMA is a relatively new compression algorithm. It is used in more and more places: 7-zip, the Linux kernel and deb and RPM packages. So adding LZMA to Strigi was a desirable step. Read More

Do you need a new telephone? A mobile one without a wire? Please consider buying a Nokia telephone. When you buy a Nokia telephone you support free software. Do not buy an iPhone, do not buy a Palm, buy a Nokia. Read More

The first Maemo Summit was held in Berlin on the 19th and 20th of September. Nokia proposed to organise a "Desktop Search Hackfest" in collaboration with the GNOME foundation. This proposal was forwarded to all the participants in the discussions on a set of common standards for desktop search called Xesam. Read More

This message is written on a N810 at the first presentation of the first Maemo conference. To be able to show my face here I have installed KDE and Strigiclient on the N810. Read More

After blogging about clocks a few times, let me post some code for a clock. Click on the image below to see it. Your browser must support SVG. This clock was inspired by an entry on kde-apps which was blogged about by Cornelius Schumacher. Read More

Playing with SVG is a lot of fun. I expanded the spiral clock I made yesterday with animated transitions between different panels. The SVG above can be viewed with Firefox 3. Read More

Yesterday, Adriaan blogged about the Antikythera mechanism. This is a fascinating piece of early machinery. Read all about it on the wikipedia page. Ade called for a plasmoid to be created of it and I think this is a good idea. Read More

A while back I blogged about querying dbpedia with sparql. The queries in that blog were pretty simple. Today, I present a more complicated example. SELECT ?a, ?long, ?lat WHERE { http://dbpedia. Read More

The coolest picture made at Akademy 2008 was made by Nepomuk developer Gunnar Aastrand Grimnes. This is the main square of Mechelen stitched together from 19 pictures. Check out the details. Read More

Today I came across an article explaining how to run JavaFX on Linux. I managed to install the sdk by downloading the Mac version. Next, I started the stopwatch example: cd /tmp unzip javafx_sdk-1_0-pre1-macosx-universal. Read More

I have many ideas and limited time. And many of the ideas I want to work on get interrupted by pressing concerns such as bug fixing and high priority features. Because of this, I tend to have many small improvements lying around in my trunk. Read More

While reading ESR's blog I came across a questionnaire to find out what kind of D&D character I'd be. I've only once joined in on a D&D role-playing evening and found it was not for me. Read More

After visiting a really nice collection of exhibit gardens, I decided to make an application to see how different plants are related by making a phylogentic tree generating webpage. For many groups of species, the familiar relationships have been examined very well, but for the combination of arbitrary species, you have to rely on taxonomic data for now. Read More

Do you know about DBpedia? It's a project that lets you perform complex queries on the content of wikipedia. I've been playing with it a bit and want to share some examples. Read More

Sebastian is apologizing to me for writing code. This is a bit strange and I need to reply to his post. The discussion below is really more suited for a mailing list, but since I did not start it I have no choice in the matter. Read More

My sister-in-law got married and the wedding photographer made a DVD with 412 pictures. Unfortunately, my parents-in-law could not read the DVD, either with Linux (which is their main OS) nor with Windows XP. Read More

A new version of Strigi, the desktop search, is available. This is a bugfix release. It fixes some annoying issues seen in KDE 4.1. Check out the ChangeLog for the details. Read More

The World Wide Web Consortium is looking into the feasibility of standardizing desktop widgets. They have done a survey on the widget frameworks available in the market. The frameworks they have surveyed are Konfabulator, Windows Sidebar, Google Desktop Gadgets, Opera Widgets, Mac OSX Dashboard, Web-Runtime by Nokia, and Joost Widgets. Read More

Today, the Dutch minister for Education and Culture, Plasterk, has defended the Dutch broadcaster NOS. NOS is broadcasting the games of the European Championship football using Microsoft malware Silverlight. This means that in order to view this broadcast you need to install this software on your computer. Read More

The Dutch like it cheap. We do not like rules. That's just the way we are. The people at NOS are no different. They have a contract with UEFA (or so they say) which requires them to broadcast the games of the European Championship only in DRM format. Read More

Microsoft is pushing their evil SilverLight platform very hard. They want to make sure that providers of cross-platform software for delivering rich applications via the web browser are thwarted. This is normal behavior for a monopolistic company and certainly for Microsoft. Read More

Please mail me if you see him. Video by motion on a Logitech Sphere.

Today is day one of FOSSCamp. FOSSCamp is an unconference, which means there is no set program. The program consists of writing entries into the empty program grid. This is refreshing approach which seems to work rather well for one particular use case: recognizing and fixing problems. Read More

Near where I live there's a pond. Actually it is right outside of my living room. In this pond there used to be many a goldfish. Until this week. Read More

Google Summer of Code has started taking student proposals. This year Strigi is joining the KDE project in Google Summer of Code again. For students looking for a nice project in information technology in the true sense of the word, Strigi is the project to join. Read More

Today we are helping novice KDE users to log out of KDE 4. Logging out of KDE 4 is nowhere near as hard as with some other popular programs. Here you do not need esoteric keyboard commands like '<esc>:q! Read More

When logging out of your desktop session, you want all programs to shut down quickly. Strigi is one of the programs that can linger while it is analyzing a file. I've done some work to improve this latency and have measured the current latency after some improvements to analyzers that can potentially take long on some files. Read More

What a surprise we had today! A coworker came to my desk and told me 'Guess what Nokia has done.' I thought for a bit and tried to infer Nokia's move from my colleagues demeanor. Read More

Yesterday we had an IRC meeting to plan our activities on Strigi for the near future. It was good to have an IRC meeting again after having been practically offline for over two months. Read More

Today at work, a new building was opened. To celebrate the happy event, Hugo Rietveld came to open the building. To do this, he needed keys and these were brought to him by a barn owl (church owl in dutch). Read More

Today Dutch parliament discussed plans of the ministry of Economic Affairs to encourage Free and Open Source Software in government. All major parties seem to understand the issues. Even news agencies are talking about 'vrije software' which is the right term ('Vrije' means 'free as in freedom'). Read More

Like many KDE application, strigidaemon uses DBus to talk to other programs. Debugging inter-process communication is never very convenient and strigidaemon is no exception. So far, there are no unit tests for checking the quality of the DBus communication in Strigi. Read More

The recent events in chinland are well explained by todays Dibert.

2007 has seen huge events for Free Software. The java source code was (mostly) released by SUN, ATI/AMD opened up to the Free Software community, and the Dutch government has started using the term Free Software (vrije software) in its plans. Read More

KDE 4 will have more semantic technologies than any KDE version before it. As an average user you may be baffled by the use of funny terms all the time. 'What are semantic technologies? Read More

A few days ago Aaron Seigo blogged about the Strigi vs Tracker vs other search engines. I agree with Aaron that we are wasting a lot of efforts by duplicating code with very similar features. Read More

The next version of KDE4 will run natively on Mac OS X and Windows XP and Vista. This means that it is a very attractive platform for software development. No other cross-platform toolkit looks as good as Qt and has an equally appealing API. Read More

Dirk pointed me to an awesome application: zzuf. This program can help you make your program more failsafe when dealing with broken data. Zzuf inserts noise in your programs input. You call it as a wrapper about the code you want to test. Read More

We're working on porting all the plugins to strigi analyzers to make them faster and make the results indexable. You can look at the current status here. If you feel like helping in KDE then read this tutorial or look at the code that's already available. Read More

First off, I'm not a fan of formula 1 races. Nevertheless, some sort of analogy can be gotten from it to describe the adoption of Strigi in KDE. Ever since Strigi moved to the directory kdesupport in the source repository, many people have started contributing to it. Read More

Since last monday, the class KFilePlugin has been removed and all the KFilePlugin implementations have to be ported. As an example of how to port a KFilePlugin, I will rewrite KDviPlugin (h, cpp)as a Strigi analyzer. Read More

You may have heard that KFilePlugin will be replaced in KDE4. In KDE4, we will use analyzers to get text and metadata out of files. Since last monday, you can start porting you analyzers and now I have written a tutorial on how to actually go about this. Read More

I just commited a change to the main CMakeLists.txt of kdelibs to require Strigi. There is no code actually using it, this will come next monday (promise!). Adding this dependency now will allow us to iron out potential problems with compiling Strigi that might pop up when many KDE developers try to compile it. Read More

Today, the code for Strigi moved to a more prominent position in the KDE subversion repository. The code now resides under /trunk/kdesupport/strigi. This is a directory for code on which (parts of) KDE depend(s). Read More

This weekend I was at FOSDEM and it was great. Jim Gettys was presenting the One Laptop Per Child progress (video). Strigi saw a lot of limelight. It was prominent in no less then three talks: Read More

Today, Midas Dekkers read the last of 1250 entertaining audio columns on man and nature. Many of his columns are available on the website of Vroege Vogels. You can download either an mp3 of the two hour show of more than 100 mb in size, or you can stream the wma version and skip to the column. Read More

Today two Sun employees, Michal Pryc and Steven Xusheng Hou, published a comparison of four desktop indexers: Beagle, JIndex, Tracker and of course Strigi. The work is really extensive and is meant for Sun internally as well as feedback to the developers of the software. Read More

Yesterday, I compiled KDE4 and ported the jstream kioslave to it. This means that now you can open email attachements or embedded files in any KDE application without writing a temporary copy. Read More

The screenshot below seems boring, but it is not. It means something nice and will start a useability discussion. The topic is 'files in files'. How should the gui deal with files in files? Read More

Photo applications such as KPhotoAlbum have shown that navigation by histograms can be very convenient. Prerequisite of such navigation is that you have fast access to numerical properties of the items you want to navigate. Read More

In the CLucene backend of Strigi, I was being conservative about allowing concurrent reads and writes to the index, hence making indexing slower if you were looking at the status. So if you were monitoring the indexing speed, it would be slower. Read More

Flavio Castelli added a nice feature to Strigi: the ability to include or exclude files from the index based on their file name. This feature has been in Strigi since the last two releases. Read More

At aKademy, David Faure presented a script for calling make from emacs when you write code in a different directory from the one you build in. Since I use vim and bash, I had to adapt it to work for me. Read More

The elections that took place in the Netherlands last Tuesday were about more than the government. In the province of Noord-Brabant, there was an additional question. This question was about a unique aspect of the province: the absence of an anthem. Read More

Strigi is moving along at a nice pace. To keep you all posted I'd like to report a bit on what exactly is the progress that has been achieved. Part of it is in SVN and will be in 0. Read More

Feel like upping your l33t Perl skills? PerlNomic is a very funny game that is a community effort in making a world where all laws are laid down in Perl code. Read More

Do you use find? Of course you do, everybody uses it -- often. It's a nice and quick program for finding files on your disk. A downside to find is that it does not list files embedded in other files like . Read More

It's sunday morning, the sun is agreeably peeping through the cloud deck and I've just booked a room in a hotel in the Elsass region in northern France after having spent two days at home resting from an exhilarating aKademy. Read More

Development of search technology is advancing at a mindmaming pace. The groupphoto of aKademy is now powered by Strigi. This allows you to search developers in the picture. You can search for names, projects or vaguely related ideas such as 'undulating'. Read More

The Strigi BoF went well and I'm pleased with the feedback. I'm glad most of the issues requested can be handle by Strigi or will be handled by the application coming from the Nepomuk project. Read More

So Akademy started and the atmosphere is great. The talks so far are very nice and if the talks that are up next hold up to their title the next days will provide a lot if listening pleasure. Read More

After more than two months of frantic development, a new Strigi release is available. This release has so many desirable features that you cannot help but upgrade. The numbering (0.3.8) is leading up to 0. Read More

This evening I ported a widget I wrote with HTML and javascript to Qt 4.2. I wrote this widget last year. It can show a timeline into which you can zoom by scrolling the mousewheel. Read More

Strigi has reached the point that the configuration files for it should be more advanced than a text file with one directory per line. Because I have good experience with using XML Schema for mapping from XML to java and back using JAXB, I'd been looking for a good toolkit that does the same in C++. Read More