Projects/Nepomuk

Warning

The Nepomuk project no longer exists in modern day KDE software. From KDE Applications 4.13 onwards, the ' Baloo' file indexing and file search framework replaces Nepomuk. Read details on the changes for Applications 4.13 here.

About Nepomuk

Nepomuk serves as a cross application semantic storage backend. It aims at collecting data from various sources - file indexing, the web, applications, etc, and linking them all together to form a cohesive map of data.

This page is dedicated to third party documentation for Nepomuk. To know more about Nepomuk from a user's point of view, head over to the Nepomuk page on UserBase. Or to know more about the Nepomuk community and getting involved in Nepomuk, head over to the Nepomuk Community Page.

Documentation

Any new project is intimidating and jumping right into the API Documentation can be scary. So, we have prepared some articles which explain the different aspects of Nepomuk and even touch on some advanced features.

The documentation of any project is always in progress as the code base is always evolving. If you feel that the documentation is lacking in some regard, please come talk to us. We'd love to hear your feedback, and the documentation might just get improved in the process.

Nepomuk Mailing List: [email protected]
IRC Channel: #nepomuk-kde on freenode

Introductory Material

If you're just getting started with Nepomuk and want to know a quick way to fetch some data.

• Quick Start
• Basic Ontology concepts
• Questions about URIs

Managing Data

This section includes more in-depth articles on how manage the data in Nepomuk. As a starting point you should probably open up the Nepomuk API Documentation. It is generally more up to date than the articles mentioned below.

• Using Resources
• Monitoring Changes
• Bulk Changes
• Data Feeders

File Indexing

With 4.10, the file indexing architecture has substantially changed. We no longer rely on strigi, and have our own plugin based interface.

• Writing an Indexing Plugin

Querying

As you advance into Nepomuk, you'll want to move beyond just fetching and pushing data and will want to query Nepomuk for specialized data. One can query Nepomuk in many different ways, the important part is to optimize your queries and make sure they run well on production systems where the database sizes may way very large.

• Different ways to Query Nepomuk
• Nepomuk Query Library
• Sparql Queries

Architectural Overview

If you're looking to get more involved with Nepomuk development process, you should probably need to need to figure out our basic architecture and where you can find all the relevant code.

• Nepomuk Repositories
• Nepomuk Architectural Overview
• Nepomuk KIO Slaves

Nepomuk Internals

When you decide to dig even deeper.

• Graph handling
• Virtuoso Internals
• Extending the Ontologies

Miscellaneous

• Porting to Nepomuk2
• Managing Nepomuk Processes
• Nepomuk Test Environment
• Nepomuk Tips and Tricks
• Debugging Nepomuk Data

Outdated links

The following links provide good reads for getting used to the Nepomuk system and its APIs. <br\> They are slightly outdated, but still has some useful material.

• Development Tutorials
• Random Ideas
• Qualified Relations Idea
• Scenario Examples