The service information (SI) document holds a definition of services provided by the service provider (e.g. MetaPub), including any relevant metadata and bearer details, such as:
- Names
- Descriptions
- Logos
- Bearers (broadcast and IP)
MetaPub provides two SI documents. The National SI document describes the distribution services provided by PRSS including basic service metadata, logos, and bearers. The current design defines two IP based services, although this may change in the future:
- Streams
- Bearer ID: prss:streams
- Service ID: streams
- Files
- Bearer ID: prss:files
- Service ID: files
The Station SI document describes the stations and broadcast services served by PRSS. Only stations and broadcast services that have opted into metadata publishing are listed in this document.
Based on section 10.2.4, the SI document will be placed in a defined location on the service website. Using standard HTTP cache mechanisms, the SI document will only need to be fetched and processed occasionally.
The response will use standard HTTP cache-control headers to indicate when the document should be refreshed as well as an ETag to allow for lightweight change detection.