[Tracker] Keywords required for the software center

["Richard Hughes (semi-automated)" <autohughski gmail com>]

Hi!

First, apologies for the direct email. I'm emailing you directly as you've been listed as the update contact 
in one or more AppData files. In the software center we allow the user to search using case-insensitive 
keywords, for instance searching for 'excel' could match Libreoffice Calc or many other free software 
spreadsheet applications. At the moment we use the translated keywords set in the desktop file, any extra 
<keyword> entries in the AppData file, and then fall back to generating tokens from the name, summary and 
description using a heuristic. This heuristic works most of the time, but a human can often do much better 
when we know what the most important words are. I've noticed your application does not have any manually set 
keywords and thought I should bring this to your attention.

So, what do I want you to do? Basically, I would like you to add some keywords in the tracker-needle.desktop 
file or the tracker-needle.appdata.xml AppData file. If you want the keywords to be used by GNOME Shell as 
well (which you probably do), the best place to put any search terms is in the keywords section [1] of the 
desktop file. This can also be marked as translatable so non-English users can search in their own language. 
This would looks something like Keywords=3D;printer; (remember the trailing semicolon!)

The alternative is to put the keywords in the AppData file so that they are only used by the software center 
and not the desktop shell. You can of course combine putting keywords in both places. The AppData keywords 
can also be translated, and would look like this:

<keywords>
<keyword>3D</keyword>
<keyword>printer</keyword>
</keywords>

Of course, you don't have to do a release with this fix straight away, and if you have a stable branch it 
would be a good thing to backport this as well if it does not add translated strings or you have no string 
freeze policy. Nothing bad will happen if you ignore this email, but please be aware that matches from 
keywords are ordered higher in the search results than other partial matches from the name or summary. You 
also don't have to add keywords that are the same as the application name or package name, as these are 
automatically added as case insensitive search tokens.

When you've changed the file(s) and committed, please email me back and I'll mark your application as 
completed. If you don't want to hear from me ever again just edit the <update_contact> in the AppData file 
and change it to somebody else. I'm not planning on emailing more than once every 6 months, so don't worry 
about me spamming you with even more work to do. If you don't add the keywords then your application will 
still be visible in the various software centers, but it may be harder to find.

Thanks,

Richard

[1] http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#recognized-keys