perfsonar development work

[Aaron Brown <>]

Joe commented previously about including URNs in the schema so that we 
can tie data in MAs more easily to the topology elements in a TS.

URN background:

Currently, each element has a global identifier of some kind. For 
example, layer3 Interfaces have IP addresses and E2EMon links have a 
global name. However, each new style of global identifier requires some 
added code in the LS to handle summarization. URNs offer a standard way 
to uniquely describe these resources without having each type of element 
or each project defining its own style of identifier.


Going through the existing subject schemas, I've come up with a 
(hopefully) minimal set of changes that would allow URNs to be included 
in the subject metadata. The page below describes the URN scheme and the 
changes needed to support including them.

https://wiki.internet2.edu/confluence/display/PSPS/URNs

If you have questions or comments, let me know. If there are no 
concerns, I'd like to add these to the topo v2.0/v3.0 schemas around 
June 15th.

Thanks.

Cheers,
Aaron