[Standards] Stanza namespaces

Peter Saint-Andre stpeter at stpeter.im
Tue Apr 27 20:34:16 UTC 2010

On 4/27/10 2:30 PM, Kevin Smith wrote:
> On Tue, Apr 27, 2010 at 9:18 PM, Peter Saint-Andre <stpeter at stpeter.im> wrote:
>> On 4/27/10 3:00 AM, Dave Cridland wrote:
>>> In XMPP, each stream has a default namespace. Stanzas are the elements
>>> with local-name "message", "presence", or "iq", qualified by that
>>> default namespace. Streams also have other, specifically documented,
>>> top-level elements, such as those for SASL, or TLS negotiation - these
>>> being explicitly signalled as being acceptable. Other unknown top-level
>>> elements will cause the connection to be dropped.
>> Sometime yesterday (before you sent your message to the list) I wrote
>> the following text in my working copy of 3920bis:
>> ***
>> Note: Because a client sends stanzas over a stream whose default
>> namespace is 'jabber:client', if the server to which the client is
>> connected needs to route a client-generated stanza to another server
>> then it MUST "re-scope" the stanza so that its default namespace is
>> 'jabber:server' (i.e., it MUST NOT send a stanza qualified by the
>> 'jabber:client' namespace over a stream whose default namespace is
>> 'jabber:server'). Similarly, a routing server MUST "re-scope" a stanza
>> received over a server-to-server stream (whose default namespace is
>> 'jabber:server') so that the stanza is qualified by the 'jabber:client'
>> namespace before sending it over a client-to-server stream (whose
>> default namespace is 'jabber:client').
>> ***
>> That might not be precise enough, and it leaves out the error handling.
> That seems fairly definitive and, as Dave mentions, the error handling
> is already defined elsewhere.

It's definitive, but it might not be correct. Do we need to be so strict
about this?


Peter Saint-Andre

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