perfsonar development work

[ulisses <>]

Hi Jason, Loukik

I have two questions, both are related

# Question #1

The first is about adding a reference to a node in an XML document using nmwg 
classes

imagine an XML document that has two completly different branches, let's say:

        /--- Node class A  ---- Node class C
Root --/
       \
        \--- Node class B  ---- Node class C


imagine now that I have defined in branch that begins with Node class A, a 
Node class C child, 
lets say "a" and I want to have the same node "a" in the branch that begins 
with the Node class B.

The proper way to do it is:

        1- new Node class C "c"
        2- add attributes to node "c"
        3- set the linkref attribute of "c", lets say to "cref"
        4- attach "c" to class A

        and then, when filling the branch that begins with the node class B...

        5- new Node class C
        6- just set the linkref attribute to be "cref"
        7- do not set any other attribute to the newly created node class C
        8- attach this new node class C to the node of class B

is this the way?

# Question #2

The second one is about the impossibility of adding an L3 Interface to the 
Node class:

The XML/RNC definition of a Node says that it can have an L3Interface child:

Node =
        element nmwgtopo3:node { NodeContent }

NodeContent =
        Identifier? &
        BaseNodeIdRef? &
        BaseRole? &
        element nmwgtopo3:name {
                attribute type { xsd:string }? &
                xsd:string
        }? &
        element nmwgtopo3:type { xsd:string }? &
        element nmwgtopo3:hostName { xsd:string }? &
        element nmwgtopo3:description { xsd:string }? &
        element nmwgtopo3:cpu { xsd:string }? &
        element nmwgtopo3:operSys { xsd:string }? &
        element nmwgtopo3:location { xsd:string }? &
        element nmwgtopo3:country { xsd:string }? &
        element nmwgtopo3:city { xsd:string }? &
        element nmwgtopo3:latitude { xsd:string }? &
        element nmwgtopo3:longitude { xsd:string }? &
        element nmwgtopo3:institution { xsd:string }? &
        (
                BaseInterface |
                L2Interface |
                L3Interface
        )*

but the class Node, in the method setInterface only accepts 
org.ggf.ns.nmwg.topology.base.v3_0.Interface
and not org.ggf.ns.nmwg.topology.l3.v3_0.Interface.

How can I add an L3Interface?

Thanks so much

        Ulisses