[Nml-wg] id/idRef

[Roman Łapacz]

W dniu 2012-07-20 16:00, Aaron Brown pisze:
>
> On Jul 20, 2012, at 9:50 AM, Freek Dijkstra wrote:
>
>> On 20-07-2012 15:31, Roman Łapacz wrote:
>>
>>> Fine by me. The only small possible problem I see is that this solution
>>> makes topology document quite static (not sure it's the right word;
>>> maybe less flexible to manipulate). I can imagine that a topology
>>> storage is split (even automatically) because of some reason and then
>>> we've got more than one document. During this operation references would
>>> have to be added in the right places.
>>
>> Good one. There actually seem two scenarios.
>>
>> 1. A document contains an internal reference. This may be useful for a
>> parser which does not parse the full XML at once, so it knows it should
>> continue.
>>
>> 2. A document contains an external reference. This may be useful for a
>> parser so it knows if it does not find certain information, it can not
>> conclude that that information is absent (it may simply be defined
>> elsewhere).
>>
>> In addition, in this second scenario a parser which encounters a network
>> object without properties and without the reference flag may raise a
>> warning because either the flag is missing, it is missing properties, or
>> there is a typo in the URI.
>>
>> My proposal only covers this second example.
>> You are right that this requires work when a topology description is
>> split or merged, but I think that is the case anyhow -- at least I see a
>> need for some checks and rewrites anyway before I'm going to accept a
>> Topology description from another domain before I add it "As is" to my
>> database.
>
> I guess I'm not sure what the purpose is in differentiating "defined 
> in the same document" vs. "defined in a different document". From my 
> perspective, it's either "the network element i'm describing is 
> defined here in the element being parsed", or "the network element i'm 
> describing is defined somewhere outside the element being parsed".

Do I understand correctly that for referencing just id is enough 
(doesn't matter whether a referenced element is in the same document or 
not). Only inheritance would require an extension (new Relation name or 
property)?

Roman

>
> Cheers,
> Aaron
>
> ESCC/Internet2 Joint Techs
> July 15-19, 2012 - Palo Alto, California
> Hosted by Stanford University
> http://events.internet2.edu/2012/jt-stanford/
>

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