File Descriptions Extension to the Presence Information Data Format (PIDF)
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The Presence Information Data Format (PIDF) defines a basic format for
representing presence information for a presentity. Presentities
publish their presence information, typically towards presence agents.
PIDF has been extended to provide rich presence information,
including, for example, the location of the presentity, their
activities, mood, the capabilities of their user agents, etc.
Presentities are willing to provide the description of available files
at watcher's disposal. This might be the case for photographs taken
with a mobile device, a recorded lecture audio file, etc. This
document extends the PIDF to provide the syntax and format for the
description of files within the PIDF.