[gfs-wg] updateLogicalReference clarification

[Peter Gardfjäll]

Hello everybody,

I would like some clarifications regarding the use of the 
updateLogicalReference operation of the RNSResolver porttype.

According to the specification, the operation is intended to allow
"the caller to update the description of the Logical Reference and 
add and/or remove associated EPRs."

Furthermore, the specification states that the EndpointReference property 
value "MUST be embedded in the Update change type element" of the 
changeProperties element (a SetResourceProperties element as pictured 
below).

  <wsrp:SetResourceProperties>
    {
      <wsrp:Insert >
        {any}*
      </wsrp:Insert> |
      <wsrp:Update >
        {any}*
      </wsrp:Update> |
      <wsrp:Delete ResourceProperty="QName" />
    }+
  </wsrp:SetResourceProperties>

So, if your are only allowed to use the Update change type of the 
SetResourceProperties element, how would you distinguish an EPR add from 
an EPR delete operation?

Furthermore, the specification is quite contradicting as it a few lines 
down goes on to state that:

"The ChangeInput parameter is fully capable of inserting, updating, and 
deleting properties in a single message exchange via the changeProperties 
component. This means that an rns:EndpointReference value may be used for 
adding a new EPR while another rns:EndpointReference value is sent 
identifying an existing endpoint reference that should be de-referenced. 
Values MUST be represented by the appropriate change type: Insert, Update, 
or Delete."

Still, if this is true, how would you represent an EPR delete using the 
Delete change type element (which only takes a QName and does not allow 
endpoint references to be specified)?

A few examples covering the intended use of this operation would be very 
helpful.

Cheers,
Peter