Tracker

Technologies

Full Text Search (FTS).
File notification for real time updates.
Stemming is used to find more relevant results. For example a search for motorbikes (plural) will also return results relevant to motorbike (singular). This operates on a multi-lingual basis.

Tracker complies with many cross desktop and technology standards, including:

D-Bus is used for inter-process communication (IPC).
SPARQL is used for RDF style querying.
The Nepomuk ontologies are followed as closely as possible.
The thumbnailer specification we started is used for creating and managing thumbnails for images and album art.
The base directory specification details how desktops should locate files at run-time.
The shared configuration specification outlines where configurations for applications should be kept (desktop-neutral).
The shared file meta-data specification outlines a common meta-data naming scheme that should be used by all technologies similar to Tracker. We try to follow this as closely as possible.
The auto-start specification describes how Tracker's processes should be initiated on the desktop's start up.

Tracker supports a number of features which makes it more appealing, including:

Ontologies describe how data is related to each other. We use this method to store data intelligently. These are some of the ontologies we support: