Clarification to TS 102 818, XML Specification for Service and Programme Information

[Ben Poor]

Dear All,

There is an ambiguity in the currently published version of TS 102 818, v3.1.1 around the URL to construct when requesting PI document from a Service Provider.

Section 10.3, PI document discovery, states:

A PI document may then be acquired using HTTP, from a URL constructed from the format:

http://<host>:<port>/radiodns/spi/3.1/<ServiceIdentifier>/<date>_PI.xml

Where host and port are populated by the host and port values obtained from the SRV record lookup for the SPI application.

The value for ServiceIdentifier is given in Hybrid Radio lookup [18].

This construction is valid when using parameters obtained over broadcast. The Hybrid Radio lookup specification (TS 103 270) gives a means of constructing this ServiceIdentifier field (NB: not the same as the serviceIdentifier field used in the SPI specification), which is valid for DAB, FM and HD.

For determining the correct URL when using parameters obtained over an IP stream, the construction should be the following:

http://<host>:<port>/radiodns/spi/3.1/id/<fqdn>/<serviceIdentifier>/<date>_PI.xml

Where fqdn and serviceIdentifier are the radiodns lookup parameters within the metadata of the IP stream.

Please post back any questions you may have on this, or whether this clarification is unclear.