[Nml-wg] Minutes of yesterdays teleconference

[Chin Guok]

Hi Jeroen,

Unfortunately due to a family illness, I will be on a plane to Singapore 
Thurs morning and will not be able to attend this meeting.  I apologize for 
not attending, and look forward to reading your minutes.

Regards.

- Chin
--On July 10, 2009 10:06:10 AM +0200 Jeroen van der Ham <vdham at uva.nl> 
wrote:

> Hello,
>
> Below are some of my notes from yesterday's NML Schema teleconference.
>
> In the teleconference we presented the new schema diagram that Martin,
> Freek and I made in Amsterdam about three weeks ago. We have made some
> significant changes, but mostly based on suggestions at the last OGF
> meeting.
> One change stands out, the way we define adaptations.
> There are now three different kinds of Adaptations:
> - Adaptation Function is the way of describing a standard adaptation
> (Ethernet to VLAN, OC192 over lambda, etc.)
> - Adaptation Service is used to describe the ability to provide an
> adaptation function in a node.
> - Adaptation Relation is then used to define a specific configured
> adaptation.
>
> Freek brought up the point that Links and Crossconnects should also be
> relations. The counterargument is that it is then impossible to describe
> properties of a Link, such as its capacity.
>
> Freek posed the question what may be missing? He suggested that we
> currently do not have Layer and Label objects. We suggested that we
> should make examples and apply the schema to use-cases to figure out if
> the current schema makes sense. Then we will also quickly find out if we
> are really missing things.
>
> Jeff brought up the point that Crossconnects and Adaptations are really
> the same kind of things. The difference currently is that adaptations
> happen between two logical ports that are part of the same physical
> port, and a crossconnect happens between two logical ports that are not
> part of the same physical port.
> A crossconnect also happens on the same layer, whereas an adaptation
> will always happen between different layers.
>
> John inquired about how to group objects to say that they are part of an
> IDC. We have the Domain object for that to group different network
> objects. The Domain object can then point to an IDC or other
> provisioning service.
>
> During the teleconference it became clear that UML is a nice way to get
> started, but now that we are getting down to the specific details we
> should move to text and examples. This should also allow us to better
> see the possible differences (or lack thereof) on Adaptations,
> Crossconnects and Links.
>
> Most important points:
> - Next teleconference is on July 30th at the same time (16:00 european,
> 10:00 eastern).
> - Martin will submit his work on defining the schema in text before the
> next teleconference.
> - Freek will prepare some use-cases and examples on cross-connects and
> adaptations, so that we can get a sense of how the schema works.
>
>
> Jeroen.
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