Policy URLs

[Christoph Anton Mitterer]

Hi.

Just a short question:
The rfc says the following about the policy url: "This subpacket 
contains a URI of a document that describes the policy that the 
signature was issued under."

This is clear for certifactions of other users and or "normal" data.

But is there any DEFINED meaning when a Policy URL is set on a 
selfsignature of a key?
When found on a 0x1F something like: "This whole (primary) key makes 
signatures under the following policy."
On a 0x18 something like: "This (secondary) key makes signatures under 
the following policy."
On 0x10-0x13 sth. like "When this users made the signature, the 
following policy applies" (of course this would require a signers UID 
packet.

This would mean that in such a case (when found on any self sig) the 
policy URL subpacket doesn't relate to the signature itself but to the 
key (-> which policy will be used by this key).

Chris.
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