如何应用Tracker？

自己做了个quick study：总体来说是做文件实时索引的一个工具，如果大家想做多媒体播放器之类的产品应该是比较实用的一个功能。就像我自己用的gmail，现在已经不做什么分类管理，需要找什么的时候search一下就好了 8 ）

http://projects.gnome.org/tracker/features.html

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.

Standards

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.

Accessible

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

• Thread safety
• Internationalization
• Localization
• UTF8 support
• Documentation

Ontologies

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:

• XML Schema Document (xsd)
• Resource Description Framework (rdf)
• Nepomuk Representational Language (nrl)
• Dublin Core meta-data (dc)
• Nepomuk Information Element (nie)
• Nepomuk Annotation Ontology (nao)
• Nepomuk Contact Ontology (nco)
• Nepomuk File Ontology (nfo)
• Nepomuk Message Ontology (nmo)
• Nepomuk CALendar (ncal)
• Simplified Calendar Ontology (scal)
• Nepomuk ID3 (nid3)
• Nepomuk MultiMedia (nmm)
• Maemo Transfer Ontology (mto)
• Maemo Location Ontology (mlo)
• Maemo Feeds Ontology (mfo)
• Multimedia Transfer Protocol (mtp)
• Tracker specific annotations (tracker)
• Maemo specific annotations (maemo)