This manual is aiming to help the translator. First the general process of how technically a translation is done is explained. Later the translation is explained from an actual English rst document that is translated to Dutch. Finally a summary of Rules of translation is given.
Although these guidelines focus on QGIS documentation, the methods and the rules described below are also applicable to QGIS applications and website translation.
To create documentation first .rst documents are created. A prebuild script creates translation files named .po files for the english language in the folder /QGIS-Documentation/i18n/en.
Diese Dateien werden außerdem in die i18en Ordner der anderen Sprachen kopiert.
The sentences in the .po files need to be translated from english to the language with a translation tool editor.
When you want to contribute, first get a .po file and add translations for the sentences in the .po file. When you are finished the .po file is placed back in the right place and during the next build the build script now creates .mo files next to the .po files. These .mo files are actually used by the script to create translated output.
When afterwards an rst document is updated a new .po file is created in the english part. The contents of this new file will be merged with already existing .po files for each language. This means that when a new line is added to an rst document that was already translated, only the new/updated sentences are added in the translated .po file and needs to be translated. The amount of work for updating translations for next versions of QGIS should be relative small.
Two different tools are currently used to do translations in QGIS:
Note that whatever tool you choose, rules of translations are the same.
Warnung
An important note: If you want to translate content within the docs folder (not web), never do this in the master branch. For translations there are always translation branches available, once a document is fully updated in english for a certain version. As an example, to translate the manual of QGIS 2.8, you have to use the manual_en_v2.8 branch.
Unsere Beispielübersetzung führen wir am Heatmap-Plugin durch. Dabei werden wir das englische Original in das Niederländische übersetzen, allerdings ist das Vorgehen für alle anderen Dokumente sowie Sprachen identisch
The source of the document can be found here:
QGIS-Documentation/source/docs/user_manual/plugins/plugins_heatmap.rst
So, warum wählte ich dieses Dokument?
It is considered finished for the current release. If it is not yet completed the following statement followed by an empty line can be found in the top of the document.
|updatedisclaimer|
This will produce a visible disclaimer in the output product. To start translating a document with an update disclaimer there is a good chance that later on it needs another finishing touch.
It also includes images, captions, headers, references and replacements.
Ich schrieb es, um mir das Übersetzen zu erleichtern ;-)
The build process has created the English .po file which can be found here:
QGIS-Documentation/i18n/en/LC_MESSAGES/docs/user_manual/plugins/plugins_heatmap.po
The equivalent Dutch .po file (basically a copy) can be found here:
QGIS-Documentation/i18n/nl/LC_MESSAGES/docs/user_manual/plugins/plugins_heatmap.po
Along this file you will see a tiny .mo file which indicates that it does not hold any translations yet.
In order to translate QGIS with Transifex, you first need to join the project. Once you got a team, click on the corresponding project and your language. You get a list of all translatable .po files. Click on the docs_user-manual_plugins_plugins-heatmap to select the heatmap plugin file and choose Translate in the prompted dialog. Note that you can also choose to download the file and translate it with tools like Qt Linguist. The next page lists all the sentences in the file. All you need to do is select the text and translate following the guidelines.
For further information on the use of Transifex Web Editor, see http://docs.transifex.com/tutorials/txeditor/.
With Qt Linguist, you need to manually grab the .po file. When you open the file in Qt Linguist for the first time you will see the following dialog:
The Target language should be filled correctly. The Source language can be left as is with language POSIX and Country/Region on Any Country.
When you press the [OK] button Qt Linguist is filled with sentences and you can start translating, see Figure_translation_menu.
Im Menü sehen Sie die folgenden Schaltflächen, die bequem sind zu nutzen.
Nun starten wir die Übersetzung von der plugin_heatmap Anleitung!
Translating most of the sentences should be straightforward. During this translation session I will point out which parts (rst statements) need special translation.
Below we see an interesting sentence to translate:
The |heatmap| :sup:`Heatmap` plugin allows to create a heatmap from a
point vector map. A heatmap is a raster map showing the density or
magnitude of point related information. From the result "hotspots" can
easily be identified.
Dieser Satz enthält zwei rst Aussagen:
All other plain text in this sentence can be translated!
The next translation item contains the :ref: statement that is commonly used to refer to another section somewhere in the manual! The text following a :ref: statement should never be changed because it is a unique identifier!
First this core plugin needs to be activated using the Plugin Manager
(see Section :ref:`load_core_plugin`). After activation the heatmap icon
|heatmap| can be found in the Raster Toolbar.
In this case load_core_plugin is a unique reference identifier placed before an rst item that has a caption. The ref statement will be replaced with the text of the header and turned into a hyperlink. When the header this reference is refering to is translated, all references to this header will be automatically translated as well.
The next item contains the rst-tag :menuselection: followed by text actually displayed in a menu in QGIS application, this may be translated in the application and therefore should be changed when this is the case.
Select from menu :menuselection:`View --> Toolbars --> Raster` to activate
the Raster Toolbar when it is not yet activated.
In above item “View –>” is actually translated to “Beeld –>” because this is the translation used in the Dutch localized QGIS application.
A bit further we meet the following tricky translation item:
The |heatmap| :sup:`Heatmap` tool button starts the Dialog of the Heatmap
plugin (see figure_heatmap_settings_).
It holds a reference to a figure figure_heatmap_settings_, and like a reference to section this reference should not be changed!! The reference definition itself from the rst-document is not included in the .po file and can therefore not be changed. This means the reference to figures can not be translated. When HTML is created you will see figure_heatmap_settings. When a PDF document is created figure_heatmap_settings_ is replaced with a figure number.
The next translation item with rst attributes is the following item:
**Input Point dialog**: Provides a selection of loaded point vector maps.
Do not remove the stars in above line. It will print the text it holds in bold. The text itself is often text included in the dialog itself and may well be translated in the application.
The following translation item contains the :guilabel: rst tag.
When the |checkbox| :guilabel:`Advanced` checkbox is checked it will
give access to additional advanced options.
The text Advanced of the guilabel tag may well be translated in the QGIS application and probably needs to be changed!
The following translation item contains ``airports``. The quotes are used to give the text another text font. In this case it is a literal value and does not need translation.
For the following example, we will use the ``airports`` vector point
layer from the QGIS sample dataset (see :ref:`label_sampledata`).
Another excellent QGIS tutorial on making heatmaps can be found on
`http://qgis.spatialthoughts.com
<http://qgis.spatialthoughts.com/2012/07/tutorial-making-heatmaps-using-qgis-and.html>`_.
This item also includes a hyperlink with an url and an external presentation. The url should of course be left intact, you are allowed to change the external text http://qgis.spatialthoughts.com which is visible by the reader. Never remove the underscore at the end of the hyperlink which forms an essential part of it!!
Stick to above presented rules and the translated document will look fine!
For any question, please contact the QGIS Community Team or the QGIS Translation Team.