[Nml-wg] URNs with query part

[Freek Dijkstra]

Hi,

I have another question about URNs with query part:

The proposed usage of a query part is that it is appended to a URN that
identifies a Group, so that the whole uniquely identifies an element
within that Group.

It is evident that the URN of the Group is a valid URN. My question: is
a URN with query part also formally a URN?

In other words, do we allow a question mark in all URNs? For example,
may I identify my PortGroup with
"urn:ogf:network:xyz.org:2012:sdfghjk?x=2"? And if so, I need to write
"urn:ogf:network:xyz.org:2012:sdfghjk?x=2?vlan=1719" to identify a Port
within this PortGroup? The double question mark seems hideous to me.

What about network objects that are identified by a non-URN, but another
type of URI. We currently allow this.

What solution do we want?
1) Follow Aaron's proposal to abandon the query part altogether, and use
a child element in XML. (How would this be used in RDF?)
2) Describe/refer to the regular rules to define query parts in URIs.
Thus with ampersands as in
"urn:ogf:network:xyz.org:2012:sdfghjk?x=2&vlan=1719"
3) Forbid query parts in all URIs (including URNs) to describe network
objects.
4) .... ?

Thanks,
Freek