Terms - Proposals
Martin @ ROE
mch at roe.ac.uk
Thu Dec 9 18:02:35 PST 2004
Tony Linde wrote:
>> data centre (or center)
A center where data is kept :-) A physical location with a defined team
that hold and manage published data. For example, the ROE WFCAM
datacenter. The OpenSky Portal. VizieR. Might often be the same as
'site' where a site has only one datacenter.
[In AstroGrid we've tended to call a single PAL webapp a datacenter, but
I don't think this is what most astronomers think of as a datacenter, or?]
A single application providing access to data (or other.. er..
resources...) I'm not sure it makes much difference if you're talking
about a web service with all it's webapps, or the individual webapps on
them. To the user it makes little difference, and to the developer also.
Along with 'protocol', describes how you use a service. SkyNode, NVO
Cone search, SIAP and SSAP are all combinations of defined interfaces
with defined protocols.
>> data collection
>> dataset (which I think is just my term for data collection)
Perhaps we could consider a 'dataset' as the data from a particular
instrument/survey, and a collection as number of datasets. For example,
SSA, USNO-B and 2MASS are three datasets in one data collection at the
The storage medium. A database might be SQL Server, or a collection of
Hopefully self explanatory :-) But there will be other terms used to
describe elements of datasets - such as 'images' which are another can
Variations (or not) on the same dataset/collection.
A process that transforms data.
>>function (as in what an app does)
I think that's a fair description!
>>I've left out 'resource' deliberately - it is a somewhat
>>loaded term. And I've tried to keep to the higher level
>>entities at this stage.
Fair enough but I think it has a place here. To me, there is a
difference between a 'resource' (eg a dataset or part of it, or storage
space, or CPU time, or an application, or a document) and
'service/interface' (the way(s) in which you can reach these resources).
I think it is fairly common practice to make this distinction.
I'll get my raincoat.
*Apologies for englishisms**. I couldn't think of anything more
suitable, and I'm sure there must be equivelents in other languages!
**Recurse to above. Oh no! Stack overflow!
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