6.9.2

# Concepts

This chapter refers to concepts shared between any applications of the trunk package.

- Messaging: Exchanging information in real-time processing
- Modules: Daemon programs and command-line tools
- Plugins: Extensions to modules
- Database: Storing meta data, configurations and data products
- Waveform archive: Storing raw waveform data
- RecordStream: Access to data from real-time servers or archives
- Inventory: Station meta data
- Configuration: Inventory, module and binding configurations
- Processing: Magnitude computation
- Processing: Locator types