# Contents

> 1. Purpose
> 2. Principle of work
> 3. Settings

> > 3.1. The configuration file
> > 3.2. Data sources
> > 3.3. A current condition
> > 3.4. Users

> 4. Filter

> > 4.1. An example of the filter
> > 4.2. The description of filter elements
> > 4.3. Rules - "traps"
> > 4.4. Debugging of the filter - "observer"

> 5. Reading of statistics

> > 5.1. The Java-client

> 6. Outside interaction

> > 6.1. Protocol
> > 6.2. The network interface
> > 6.3. The PIPE-interface