UCD elements

[Marco C. Leoni]

Unless they use a "translator" service (or include such a thing within 
themselves).

Since a conversion has to be made anyway, including all the possible 
UCD-translations of the metadata seems superfluous and also overload ing 
the transmitted xml.


Marco


Martin Hill wrote:

> This means then that new services that support, say UCD2s, cannot be 
> used by older services or clients that have no knowledge of UCD2s...
>
> Marco C. Leoni wrote:
>
>> Hi Tony,
>>    I think the services should say the UCDs version they are using or 
>> can understand/support: the registry - as a service itself - will 
>> specify the UCD version used to create the metadata describing itself.
>>
>>
>> Cheers,
>>    Marco
>>
>>
>>
>> Tony Linde wrote:
>>
>>> I agree with Clive. We need some way of saying that version X of 
>>> registry
>>> uses UCD1 and version X+1 will use UCD2 or whatever. Or each 
>>> registry says
>>> which versions of individual standards it supports (UCDs, 
>>> Identifiers, etc).
>>> We certainly shouldn't stuff every variant of every standard into the
>>> metadata.
>>>
>>> Tony.
>>>
>>>  
>>>
>>>> -----Original Message-----
>>>> From: Clive Page
>>>> Sent: 02 July 2004 09:11
>>>> To: registry at ivoa.net
>>>> Cc: VOTable mailing list
>>>> Subject: Re: UCD elements
>>>>
>>>> On Thu, 1 Jul 2004, Martin Hill wrote:
>>>>
>>>>  
>>>>
>>>>> We will need (at latest when we introduce UCD2 over UCD1+) 
>>>>> simultaneous UCDs of different versions in single metadata     
>>>>
>>>>
>>>> documents  
>>>>
>>>>> (so both older and newer tools can use them).
>>>>>     
>>>>
>>>>
>>>> Is that really necessary?  As I understand it there is a unique 
>>>> one-to-one mapping from UCD1 to UCD1+, which should be easily 
>>>> encapsulatable in software, or even a Web Service.  I'm not sure if 
>>>> that's true too of UCD2, but if it isn't doing conversions is going 
>>>> to be labour-intensive.
>>>> Putting duplicated UCDs of different versions in each data file 
>>>> seems a bit of overkill if that's true.
>>>>
>>>>
>>>> -- 
>>>> Clive Page
>>>> Dept of Physics & Astronomy,
>>>> University of Leicester,
>>>> Leicester, LE1 7RH,  U.K.
>>>>
>>
>>
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