User talk:Jeroen De Dauw

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§A barnstar for you![edit | edit source]

Vitruvian Barnstar Hires.png The Technical Barnstar
Heiya Jeroen,
this is for your tireless efforts on making extensions more professional as well as having an ear for the community. I and presumably a lot of other people out there very much appreciate this. Cheers and keep up your excellent work.
-- [[kgh]] 10:19, 10 December 2011 (UTC)

§A kitten for you![edit | edit source]

Kitten (06) by Ron.jpg


Jens Ohlig (talk) 00:43, 18 October 2012 (UTC)

Start a new discussion


Thread titleRepliesLast modified
Survey extension016:39, 26 February 2015
Extension:Semantic Image Input213:00, 29 January 2015
Kml export315:54, 19 January 2015
Problems with Live Transalte017:01, 18 December 2014
Thanks120:49, 25 June 2014
Mediawiki 1.23 problem012:46, 9 June 2014
Indicate Composer installation214:41, 9 January 2014
use Extension Installer on a wikifarm 214:12, 9 December 2013
Old version of Maps extension?115:11, 20 November 2013
wikibase databse019:03, 16 June 2013
suggest/feedback for wikibase019:00, 16 June 2013
Kiwi Cat War!001:46, 15 May 2013
Help006:07, 5 March 2013
New messages020:05, 22 February 2013
My new pet218:07, 13 February 2013
schema.org217:47, 13 December 2012
Wikimedians in belgium219:41, 7 December 2012
Travis CI mails214:24, 19 October 2012
Status of "image layers" in Maps for OpenLayers ?212:25, 19 October 2012
Education Program Extension.917:10, 3 October 2012
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Survey extension

Hi, I tried to use Survey extension with MediaWiki 1.24. Everything seems to go well, but the survey cannot be deployed to the user. An annoying message is shown, but nothing else. Any idea? Thank you in advance!

LiaVeja (talk)16:39, 26 February 2015

Heiya Jeroen, what about moving this to GitHub, too. Cheers

[[kgh]] (talk)12:52, 29 January 2015
Edited by 0 users.
Last edit: 12:55, 29 January 2015

Why? Someone needs to maintain it for it to make a difference. GitHub is esp more convenient for tests, CI and packagist, none of which this extension has at this point. 12:56, 29 January 2015 (UTC)12:55, 29 January 2015

Probably I figured that having such extensions in one spot to work on is nicer. However, it is a very special interest extension which indeed also need a maintainer for this too. No worries since it still can happen in the future.

[[kgh]] (talk)13:00, 29 January 2015

Kml export

Hi Jeroen, I've tried your extension kml export, but it doesn't seems to work on my wiki ! I can publish googlemaps (so it seems working well) with Maps and Semantic-Maps. I even tried with adding 'kml' format in the array in the settings of result formats or adding $srfgFormats[] = 'kml'; in the localsettings.php

on the page you give two examples of queries for coords, how do we get the kml export file?

Thanks for answer and continue working in Wikipedia !!!

Tetrao (talk)10:33, 19 February 2013

Now tracked at

Jeroen De Dauw (talk)19:02, 24 March 2014

There was a problem for "/Maps/includes/Maps_KMLFormatter.php" line 157. The parser tries to get the altitude value from the database that doesn't exist. (KML file has altitude values besides lat/long, and is supposed to be zero if there's no value). I basically changed that line to: "$coordinates->getLongitude() . ',' . $coordinates->getLatitude() . ',0'" and the problem goes away. There might be a better way to do this, but if the geo coordinate property is not designed to hold altitude, then have the altitude value hard coded as zero may still be suitable.

Acnetj (talk)00:04, 19 January 2015

Thanks for pointing this out. This is fixed now, in the 3.2.2 release., 19 January 2015

Problems with Live Transalte


I expirience some problems with Live Translate. Main problem is that the transate button is not showing up on pages…

I've instaled this extension according to instuction on wiki (). After that I got „database error” probably because tables in databse was not created. I've created them manualy using definitions in file lifetranslate.sql. Wiki now works normaly but transalte button is missing…

How to debug this problem?

I'm using latest version of MediaWiki, Ubuntu server, Apache/PHP/My SQL. Extension is listed on PSecial pages → Version…, 18 December 2014

Thanks for your advice on my GraphViz extension re-write. The code review process involved lots of waiting but it is merged now and I've completed the corresponding documentation update (mw:Extension:GraphViz). Thanks again!

Welterkj (talk)23:12, 6 June 2014

You are welcome

Jeroen De Dauw (talk)20:49, 25 June 2014

Mediawiki 1.23 problem

Hi Jeroen,

I'm using Mediawiki 1.23 now. But I am constantly having a "Notice: Undefined index: read in /XXX/wiki/includes/installer/LocalSettingsGenerator.php on Line 226" at the top of my wiki page.

The line is like:

if ( $this->groupPermissions ) {
    $groupRights .= "# The following permissions were set based on your choice in the installer\n";
        foreach ( $this->groupPermissions as $group => $rightArr ) {
            $group = self::escapePhpString( $group );
            foreach ( $rightArr as $right => $perm ) {
                $right = self::escapePhpString( $right );
                $groupRights .= "\$wgGroupPermissions['$group']['$right'] = " .
                                        wfBoolToStr( $perm ) . ";\n";
        if ( $this->groupPermissions['*']['edit'] === false
            && $this->groupPermissions['*']['createaccount'] === false
Line 226==> && $this->groupPermissions['*']['read'] !== false
        ) {
            $noFollow = "\n# Set \$wgNoFollowLinks to true if you open up your wiki to editing by\n"
            . "# the general public and wish to apply nofollow to external links as a\n"
            . "# deterrent to spammers. Nofollow is not a comprehensive anti-spam solution\n"
            . "# and open wikis will generally require other anti-spam measures; for more\n"
            . "# information, see\n"
            . "\$wgNoFollowLinks = false;";

I try to define 'read' in my "LocalSettings.php" file in this way:

$wgGroupPermissions['*']['read'] = true;

But it didn't work out. Please help me to remove this notice, thank you!

LiangHao (talk)12:46, 9 June 2014

Indicate Composer installation

I think that it becomes more and more essential to indicate that an extension has to be installed with Composer. Thus I have added a new option to Template:Extension. I guess this is ok and hope it does not get reverted. This thread is just for your info.


[[kgh]] (talk)19:22, 6 January 2014

I figured it would be even nicer to point people to the package archive whilst we are at it. Thanks go to Jamie for this inspiration.

[[kgh]] (talk)14:39, 8 January 2014


Jeroen De Dauw (talk)14:41, 9 January 2014

use Extension Installer on a wikifarm

We have Drupal-style wikifarm ( and not all language versions use the same extensions. Can we use this extension and if so, what is the best way?

Egel (talk)12:07, 9 December 2013

I suspect you can, perhaps after fixing some minor issues. I don't know though, as I'm not familiar with how your farm is set up or even how this is done in general.

Jeroen De Dauw (talk)12:14, 9 December 2013

Old version of Maps extension?

I have an old MW 1.15.1 install using the depreciated GoogleMaps extension that uses Google Maps V2 which is of course also depreciated. So all maps stopped working on my wiki as of yesterday. As a temporary solution, before upgrading MW and installing the current Maps, I'd like to use an earlier version of your Maps extension and for this I need the 0.7.x version but I couldn't find it anywhere. Is it still available to somewhere? If so, where?, 20 November 2013

wikibase databse

hi can I have some help with wikibase I have installed repo and lib on one of my wikis and installed lib and client on the other wiki but I doint know how to change the databse from enwiki to mine please could I have some help, 16 June 2013

suggest/feedback for wikibase

hi I have a suggestion for wikibase my suggestion is could you allow wikibase to use your interwikis links so that it is easeer instead of going through wikibase finding ways on adding other links and trying to add database, 16 June 2013

Hi this is arun and i think i am having a decent role in devolepment and this is my website expecting your replay and i want your help realley i need it

Arunwebber (talk)06:07, 5 March 2013

New messages

Hey Jeroen, I was just on here again and I saw there were 2 new messages now, but these weren't for me. I'm guessing this is a known error associated with a new feature rollout in beta? Best.

Biosthmors (talk)20:05, 22 February 2013

My new pet

Thanks, dude :)

^demon[omg plz] 12:34, 12 February 2013 (UTC)12:34, 12 February 2013

i don't understand that message exactly! nor do i understand exactly how these messages work! Biosthmors (talk) 18:05, 13 February 2013 (UTC)

Biosthmors (talk)18:05, 13 February 2013

ah now i see User talk:^demon, but why did it show up that there was 1 new message on the top of my screen?

Biosthmors (talk)18:07, 13 February 2013

Dear Jeroen, Sorry if this is a dunce question, but is there a simple way of importing the vocabulary/structure into the semantic mediawiki that I have created? best wishes,

Open Research (talk)17:19, 13 December 2012

I'm not really the person to ask about vocabularies. A better place to ask would be the SMW user list.

Jeroen De Dauw (talk)17:25, 13 December 2012

Thanks for the heads-up :) j

Open Research (talk)17:47, 13 December 2012

Wikimedians in belgium

Hello Jeroen De Dauw, I noticed you saying here you live close by. We are currently working on founding a chapter in Belgium. If you are interested in this, you can visit our wiki at wmbe: and sign up on wmbe:Founding/Interested people. Greetings - Romaine (talk) 16:00, 7 December 2012 (UTC)

Romaine (talk)16:00, 7 December 2012

I've already been on that list for half a year :)

Jeroen De Dauw (talk)16:11, 7 December 2012

Sorry, I apparently missed your name. Be welcome to be more active on the wiki and with the projects! :-)

Romaine (talk)19:41, 7 December 2012

Travis CI mails

If you just received some mails from Travis CI: Sorry, I messed up and used a "git commit --amend" where I shouldn't have.

Tim Landscheidt19:34, 18 October 2012

I don't see any - either way don't worry about it :)

Jeroen De Dauw (talk)10:19, 19 October 2012

It should have been delivered around 19:25Z to the address Perhaps filtered as spam?

Tim Landscheidt14:24, 19 October 2012

Status of "image layers" in Maps for OpenLayers ?

Hello I retrieved version 2.0 of Maps from a Git snapshot. I am unclear if image layers are supported at this time. I looked at the documentation - - but I can't see how to actually reference an image directly. That example seems to use some kind of predefined layer but I'm not sure where that is. I am hoping to have my set up allow editors to use images that they upload in the usual way and then use the image as a map layer. This is for collaboratively commenting/marking images.

DJBarney24 (talk)12:51, 18 October 2012

This functionality was added quite a while back mostly as proof of concept and has since not been polished or maintained. I suspect it's completely broken in Maps 2.0.x. User:Danwe has been doing work to enhance the functionality but it has not made it's way into master yet. Hopefully it will be in the 2.1 release :)

Jeroen De Dauw (talk)13:16, 18 October 2012

Thanks. I'll get in contact with Danwe. I notice he mentions that it inadvisable using some of these extensions on large wiki's. My project could potentially be large as it is to do with collaboratively marking/commenting space images (primarily planetary surfaces).

DJBarney24 (talk)12:17, 19 October 2012

Education Program Extension.

Hi Jeroen Your work is awesome. Could you tell me, is the Education Program Extension still disabled (and if so what does that mean, exactly?) I'm a newbie but I am hoping to use this extension for a new project. Thanks! Open Research (talk) 20:12, 9 September 2012 (UTC)

Open Research (talk)20:12, 9 September 2012

Thanks :)

There currently is an RFC about enabling it on Wikipedia:, 9 September 2012

Thanks so much for your help, and apologies for being at the very beginning of a steep learning curve. (I have only just learned to edit my Mediawiki on my MAMP local server.)

The debate looks pretty complicated, but I was confused about something that isn't written down there (I think).

After reading the page you showed me, I realised [?] that an education person can experiment with the Extension already, or use it in a class now, even if it is still disabled (is that right?).

If so, that means all I have to do is figure out how to get hold of Mediawiki 1.20 (??), and then I can install and use - (is that right?)

Thanks again Open Research (talk) 21:00, 9 September 2012 (UTC)

Open Research (talk)21:00, 9 September 2012

The extension is not enabled on Wikipedia yet, so you cannot use it in the context of Wikipedia yet. However, if you yourself have a similar program, and you have your own wiki on which you're running it, then you can get the extension and immediately start using it with the features it currently has. The later case (having such a program yourself) seems slightly unlikely to me, so I'm not sure you actually have use for this extension :)

Jeroen De Dauw (talk)19:09, 12 September 2012

Hi Jeroen, thanks so much for getting back to me. Actually I do have a wiki that I was going to launch in a week or two, and your extension is going to be *perfect* for it. I was so excited when I found it, I nearly fell off my chair.

My wiki needs some of the features of Semantic Mediawiki - are the two extensions (Semantic Mediawiki and Education Program) compatible, do you think?

Although I am very much a kitchen-table social entrepreneur at the moment, I'm aiming to make my novel project national/international in scope.

Open Research (talk)20:02, 12 September 2012

EP and SMW are compatible in that they don't break or interfere with each other, but at the same time, they don't make use of each other.

Good luck with the social entrepreneurship :)

Jeroen De Dauw (talk)09:10, 13 September 2012
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