Editing Task:Karma for applications

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Application karma seeks to provide plausible "score number" for each application in the Maemo application catalog.

The application karma will follow a pattern familiar from Maemo's user karma (see http://maemo.org/profile/list/ and http://maemo.org/profile/view/bergie/), utilizing various sources of information about the application to calculate its activity and importance.

== Goals ==

* Provide a simple, unified way for users and developers to judge an application's quality.
* Provide a distributed [[Extras repository process definition|quality assurance]] system for handling package promotion.
* Provide a fast-updating list of "currently hot" applications
* Provide a way to rate applications remotely

== Metrics for judging "quality" ==

These are calculated using information inside maemo.org Midgard database:

* Number of downloads
* Number of ratings
* Average rating
* Frequency of updates
* Number of releases available
* Number of OS versions supported

As well as from outside it:

* Bug activity (in Bugzilla)
* Freshmeat.net stats (when the new Freshmeat [http://help.freshmeat.net/discussions/questions/39-where-are-the-rdf-files-from-the-backend-directory#comment_120399 reimplements their APIs])
* Blog mentions (via Technorati, using "unixname" as tag)
* Screenshots uploaded (via [http://www.flickr.com/services/api/flickr.photos.search.html Flickr], using "unixname" as tag)
* Number of contributors in Garage

All karma items are counted once per day, and stored so that the development of application karma can be followed on a graph.

== Counting currently "hot" applications ==

To make a dynamic listing of applications that are "hot right now", we need to store some additional download statistics per application:

* Total amount of downloads
* Average downloads per day during last week
* Yesterday's downloads

These can then be used to calculate whether an application is getting more downloads on a given day than usual, meaning that it is "currently hot".

This should be possible to count via:

current karma = (yesterday's karma - age modifier) + (total download count - yesterdays downloadcount - lastweeks daily average)

== Remote rating of applications ==

Maemo applications will be featured in other services outside the regular Maemo.org website scope, including the application manager in the device itself.

To support rating applications through these, we should implement an API for rating and commenting applications remotely.

The API could be modeled after [http://web.archive.org/web/20060203035137/http://wellformedweb.org/story/9 CommentsApi].

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Editing Task:Karma for applications

@@ Line 31: / Line 31: @@
 * Number of contributors in Garage
-All karma items are counted once per day, and stored so that the development of application karma can be followed on a graph. The total karma of an application will be available in the application's [http://www.midgard-project.org/documentation/mgdschema-metadata-object/ metadata.score].
+All karma items are counted once per day, and stored so that the development of application karma can be followed on a graph.
 == Counting currently "hot" applications ==