[Sip] Question on format of retention-expiry (absolute time) in RFC4119 (Presence-based GEOPRIV Location)

["Rajeev Narang (ranarang)" <ranarang at cisco.com>]

Hi,

 

RFC3261 specifies Date header in the following format:-

Date: Fri, 18 Jul 2008 12:01:08 GMT

 

RFC4119 specifes retention-expiry in the following format:-

   <gp:retention-expiry>2007-07-27T18:00:00Z</gp:retention-expiry>

 

This seems like another format for representing absolute time.

 

Could somebody provide me info, on which RFC is this absolute time based on.

 

Any idea how this can be implemented in Linux for sending and parsing.

 

Thanks.

Regards,
Rajeev

 

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