[Nmc-wg] Review of documents

[Nina Jeliazkova]

Michael Bischoff wrote:
> Hello all,
>
> Are you sure Nina? Afaik a WSDL can be defined with a single method
> that takes a document and define that the document needs to have a
> NMWG schema?
>
Yes indeed.  Sorry for not being clear, I wanted to point domain
specific schema is necessary anyway.

Best regards,
Nina
> Alike: http://www.w3.org/2001/04/wsws-proceedings/uche/wsdl.html
>
> Though it does require a xsd or other supported schema type (eg not
> relaxng). Now relaxng can be transformed but the transformation isn't
> formal/unambiguous/two-way, or differently put if you transform from
> relaxng to xsd and back you are not guaranteed to end up with the same
> relaxng document. This is because some relaxng concepts can't be
> mapped completely into xsd. Now afaik we don't make use of such
> concepts now but it could create problems in the future.
>
> As I frequently hear that there is no objection to particular preference
> for xsd/relaxng from a theoretical standpoint (I know WG prefers
> relaxng) Why not switch to xsd for practial reasons?
>
> Considering I haven't seen the detailed report yet, please review the
> following comments with that in mind;
>
> For all that is wrong about perfsonar(and there are things wrong),
> certain
> key area's seem to be overlooked.
>
> Perfsonar is about sharing data to solve problems around services that
> stretch across multiple administrative domains as opposed to making the
> data available just within your own domain. For example AA, as far as
> Authentication is concerned with NETCONF; it is left to the transport
> layer which basically means that it's up to administrator/deployers to
> sort it out. Now I'm sure admins/deployers are up to the task but still
> it would require considerable effort as well as additional
> specification/conventions. As perfsonar is actually focused on making
> network measurements avail across multiple administrative domains it
> actually does solve/handle this. Even currently all it takes is to
> point a
> service to an AA-server. As pointed out on the perfsonar-dev list even
> suppling an AA-server could easily be done automatically.
>
> Perfsonar was not designed to replace current measurement systems
> the idea was to complement them. As such it shouldn't be competing
> with netconf; however as there are propriatary solutions for 'local' use.
> Netconf might find itself caught in the middle.
>
> Regards,
>
> Michael
>
>
>
> Nina Jeliazkova wrote:
>> Roman Lapacz wrote:
>>> Freek Dijkstra wrote:
>>>  
>>>> Hi all,
>>>>
>>>> My apologies for the (very) late reply.
>>>>
>>>> I have a few generic comments and questions on "Extensible Protocol
>>>> for
>>>> NMC" for now and will follow up with some more detailed remarks later.
>>>> (I planned to have the detailed remarks now, but was not able to
>>>> finish
>>>> reading all I wanted).
>>>>
>>>> My main point of criticism is that I do not (yet) understand why this
>>>> protocol was developed; as a naive reader it seems to highly overlap
>>>> with what has been done with WSDL. Unfortunately, I'm not an expert on
>>>> either, so I might miss the point. WSDL was developed as a generic
>>>> request-response protocol framework, and so is "Extensible Protocol
>>>> for
>>>> NMC".
>>>>
>>>>       
>>>
>>> NMC schema transformed from Relax NG into XSD format could be used
>>> in WSDL file to describe all messages. I didn't try it but basing on
>>> my (limited) knowledge of WSDL it's possible. So I don't see the
>>> conflict here.
>>>
>>> I understand that WSDL was mentioned here as an example for general
>>> observation that maybe some existing standard could be used instead
>>> of NMC. The same comment was raised in Geant3 by people who were not
>>> involved earlier in pS work. The investigation of Netconf in pS is a
>>> try to look at this issue and find answers.
>>>
>>>   
>> WSDL alone is not sufficient for defining working web services, one
>> needs to define namespaces and XML schema, specific for the domain
>> (NMC schema for network monitoring in our case).
>> On the other hand, WSDL can still be used in implementations ,
>> together with NMC schema, to allow automatic generation of client
>> classes, but this opportunity has not been explored so far.
>>
>> Best regards,
>> Nina
>>
>>> Roman
>>>
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>>>   
>>
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