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# Presentations

A presentation is a Python code module which is responsible for gathering sample data from Dia channels and re-presenting it in another format. The newly formatted data is usually sent over a network or written to a storage device.

Presentations gather sample data from the Channel Database. They do so either by polling–for example, checking on a time interval if a channel of interest has changed, or by interrupt-receiving an indication by means of a call back function by subscribing to one or more channels.

Currently, iDigi Dia includes the following presentations:

- Console
- Embedded Web
- iDigi DB
- Rabbit web
- RCI
- Short Messaging
- SMTP
- TCP CSV
- Web
- XML-RPC

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