On 01/08/2014 05:39, manning bill wrote: > it has always been my understanding that (with a few exceptions that have become more and more common over the years) IETF standards allowed for open source development. What exceptions, Bill? IETF standards are open voluntary standards that anyone can implement how they like. It's a fact that open source implementations that infringe patents are intrinsically problematic, so if there is an IPR disclosure that doesn't offer open-source-friendly conditions, that can be a problem. It's a fact that code fragments in RFCs are normally subject to the Simplified BSD License (for the full story see the IETF Trust Legal Provisions). Brian