<link>http://people.skolelinux.org/pere/blog/</link>
<atom:link href="http://people.skolelinux.org/pere/blog/index.rss" rel="self" type="application/rss+xml" />
+ <item>
+ <title>Graphing the Norwegian company ownership structure</title>
+ <link>http://people.skolelinux.org/pere/blog/Graphing_the_Norwegian_company_ownership_structure.html</link>
+ <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Graphing_the_Norwegian_company_ownership_structure.html</guid>
+ <pubDate>Mon, 15 Jun 2015 14:00:00 +0200</pubDate>
+ <description><p>It is a bit work to figure out the ownership structure of companies
+in Norway. The information is publicly available, but one need to
+recursively look up ownership in all owners to figure out the complete
+ownership graph of a given set of companies. To save me the work in
+the future, I wrote a script to do this automatically, outputting the
+ownership structure using the Graphviz/dotty format. The data source
+is web scraping from <a href="http://www.proff.no/">Proff</a>, because
+I failed to find a useful source directly from the official keepers of
+the ownership data, <a href="http://www.brreg.no/">Brønnøysundsregistrene</a>.</p>
+
+<p>To get a owner ship graph, fetch
+<a href="https://github.com/petterreinholdtsen/brreg-norway-ownership-graph">the code from git</a> and run it using the organisation number. I'm
+using the Norwegian newspaper Dagbladet as an example here, as its
+ownership structure is very simple:</p>
+
+<pre>
+% time ./bin/eierskap-dotty 958033540 > dagbladet.dot
+
+real 0m2.841s
+user 0m0.184s
+sys 0m0.036s
+%
+</pre>
+
+<p>The script accept several organisation numbers on the command line,
+allowing a cluster of companies to be graphed in the same image. The
+resulting dot file for the example above look like this. The edges
+are labeled with the ownership percentage, and the nodes uses the
+organisation number as their name and the name as the label:</p>
+
+<pre>
+digraph ownership {
+rankdir = LR;
+"Aller Holding A/s" -> "910119877" [label="100%"]
+"910119877" -> "998689015" [label="100%"]
+"998689015" -> "958033540" [label="99%"]
+"974530600" -> "958033540" [label="1%"]
+"958033540" [label="AS DAGBLADET"]
+"998689015" [label="Berner Media Holding AS"]
+"974530600" [label="Dagbladets Stiftelse"]
+"910119877" [label="Aller Media AS"]
+}
+</pre>
+
+<p>To view the ownership graph, run "<tt>dotty dagbladet.dot</tt>" or
+convert it to a PNG using "<tt>dot -T png dagbladet.dot >
+dagbladet.png</tt>". This is the result can be seen below:</p>
+
+<img src="http://people.skolelinux.org/pere/blog/images/2015-06-15-ownership-graphs-norway-dagbladet.png" width="80%">
+
+<p>Note that I suspect the "Aller Holding A/S" entry to be incorrect
+data in the official ownership register, as that name is not
+registered in the official company register for Norway. The ownership
+register is sensitive to typos and there seem to be no strict checking
+of the ownership information.</p>
+
+<p>Let me know if you improve the script or find better data sources.
+The code is licensed according to GPL 2 or newer.</p>
+</description>
+ </item>
+
<item>
<title>Measuring and adjusting the loudness of a TV channel using bs1770gain</title>
<link>http://people.skolelinux.org/pere/blog/Measuring_and_adjusting_the_loudness_of_a_TV_channel_using_bs1770gain.html</link>
</description>
</item>
- <item>
- <title>Frikanalen, Norwegian TV channel for technical topics</title>
- <link>http://people.skolelinux.org/pere/blog/Frikanalen__Norwegian_TV_channel_for_technical_topics.html</link>
- <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Frikanalen__Norwegian_TV_channel_for_technical_topics.html</guid>
- <pubDate>Mon, 9 Mar 2015 11:10:00 +0100</pubDate>
- <description><p>The <a href="http://www.nuug.no/">Norwegian Unix User Group</a>,
-where I am a member, and where people interested in free software,
-open standards and UNIX like operating systems like Linux and the BSDs
-come together, record our monthly technical presentations on video.
-The purpose is to document the talks and spread them to a wider
-audience. For this, the the Norwegian nationwide open channel
-<a href="http://www.frikanalen.no/">Frikanalen</a> is a useful venue.
-Since a few days ago, when I figured out the
-<a href="http://beta.frikanalen.no/api/">REST API</a> to program the
-<a href="http://beta.frikanalen.tv/guide/">channel time schedule</a>,
-the channel has been filled with NUUG talks, related recordings and
-some Creative Commons licensed TED talks (from archive.org). I fill
-all "leftover bits" on the channel with content from NUUG, which at
-the moment is almost 17 of 24 hours every day.</p>
-
-<p>The list of NUUG videos
-<a href="http://beta.frikanalen.tv/organization/82">uploaded so far</a>
-include things like a
-<a href="http://beta.frikanalen.tv/video/625090">one hour talk by John
-Perry Barlow when he visited Oslo</a>, a presentation of
-<a href="http://beta.frikanalen.tv/video/624275">Haiku, the BeOS
-re-implementation</a>, the
-<a href="http://beta.frikanalen.tv/video/624493">history of FiksGataMi,
-the Norwegian version of FixMyStreet</a>, the good old
-<a href="http://beta.frikanalen.tv/video/623566">Warriors of the net
-video</A> and many others.</p>
-
-<p>We have a large backlog of NUUG talks not yet uploaded to
-Frikanalen, and plan to upload every useful bit to the channel to
-spread the word there. I also hope to find useful recordings from the
-Chaos Computer Club and Debian conferences and spread them on the
-channel as well. But this require locating the videos and their meta
-information (title, description, license, etc), and preparing the
-recordings for broadcast, and I have not yet had the spare time to
-focus on this. Perhaps you want to help. Please join us on IRC,
-<a href="irc://irc.freenode.net/%23nuug">#nuug on irc.freenode.net</a>
-if you want to help make this happen.</p>
-
-<p>But as I said, already the channel is already almost exclusively
-filled with technical topics, and if you want to learn something new
-today, check out the <a href="http://www.frikanalen.tv/se">Ogg Theora
-web stream</a> or use one of the other ways to get access to the
-channel. Unfortunately the Ogg Theora recoding for distribution still
-do not properly sync the video and sound. It is generated by recoding
-a internal MPEG transport stream with MPEG4 coded video (ie H.264) to
-Ogg Theora / Vorbis, and we have not been able to find a way that
-produces acceptable quality. Help needed, please get in touch if you
-know how to fix it using free software.</p>
-</description>
- </item>
-
</channel>
</rss>
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