[zeromq-dev] Out dated Spec: 15/ZMTP - ZeroMQ Message Transport Protocol

Pieter Hintjens ph at imatix.com
Mon Dec 31 10:51:35 CET 2012

Hi Michael,

The spec is accurate; XPUB/XSUB are not visible on the wire, they are
API constructs. Whether you use PUB or XPUB, the wire protocol is the
same, and uses the PUB socket type. Ditto for XSUB/SUB. I've added a
note to the RFC page to clarify this.

There are no undocumented changes to the protocol. If you find any,
those would be considered bugs.


On Mon, Dec 31, 2012 at 9:44 AM, Michael Compton
<michael.compton at littleedge.co.uk> wrote:
> The spec does not refer to the xpub/xsub which are now available.
> I would edit but I am not totally confident I understand fully the semantics
> for the sockets, i.e. which other sockets are allowed to connect.
> Also has there been any other undocumented changes to the protocol?
> Spec link:
> http://rfc.zeromq.org/spec:15
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