"iso" URN namespace - machine-readable reference to ISO standards

I found IETF RFC5141 http://tools.ietf.org/html/rfc5141 defines the "iso" namespace of the URN.  That makes it possible to cite ISO standards in a computer-readable manner.  The metadata standards used in the WMO Core Metadata Profile can be called like following:

• urn:iso:std:iso:19115:2003:en
• urn:iso:std:iso:19115:cor-1:2006:en
• urn:iso:std:iso:ts:19139:2007:en

Interestingly enough, the author (from ISO) says the ISO requests this namespace because the URN scheme using OID (such as urn:oid:1:0:19115 for ISO 19115) is not human-readable.

I'm not trying to change WCMP (for example gmd:metadataStandardName) since (for now) I don't know request that the field has to be computer-readable. But I think it is worth sharing.

[article also posted to WMO/IPET-MDRD]