Hello, I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written primarily for the benefit of the security area directors. Document editors and WG chairs should treat these comments just like any other last call comments. This document introduces a new namespace for the DGI Working Group ( http://www.dgiwg.org ) and has a very light security considerations section (1 sentence only), as is usually the case with such documents (see http://www.iana.org/assignments/urn-namespaces/urn-namespaces.xml ). That being said, since the goal of the DGIWG is to facilitate the exchange of geospatial information between countries, in particular in context of military cooperations, security is critical. Therefore the author could perhaps elaborate a little bit more. For instance one or two sentences highlighting the importance of having secure methods to access locations once the URN resolution has taken place (i.e. after the name to location resolution) could be added, with a few pointers. Regards, Vincent