Akonadi

Developer(s)	KDE team
Stable release	1.2
Written in	C++
Operating system	Cross-platform
Type	Personal information management
License	LGPL 2.1
Website	akonadi-project.org

Akonadi is a storage service for personal information management (PIM) data and meta data. It is one of the “pillars” (core technologies) behind the KDE 4 project, although it is designed to be used in any desktop environment. It is extensible and provides concurrent read, write, and query access.

Akonadi will provide unique desktop wide object identification and retrieval.^[1] Akonadi will function as an extensible data storage for all PIM applications. In KDE 3 each PIM application had different data storage and handling methods, which led to several implementations of essentially the same features. Besides data storage, Akonadi has several other components including search, and a library (cache) for easy access and notification of data changes.

Akonadi communicates with servers to fetch and send data instead of applications through a specialized API. Data can then be retrieved from Akonadi by a model designed to collect a specific data (mail, calendar, contacts, etc). The application itself will be made of viewers and editors to display data to the user and let them input data. Akonadi will also support metadata created by applications.^[2]

Because Akonadi takes care of data storage and retrieval, which are traditionally the difficult parts of creating a PIM application, development of PIM applications is made much easier. In fact, the Mailody team demonstrated how a mail reader could be created in only 10 minutes using Akonadi.^[3]

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