Multi-dimensional Data Access minimal requirements

[Ray Plante]

Hi Severin et al,

I think this is a good set of minimum requirements, and appears to be 
consistent with what we're doing in the VAO.  I have two comments: 
first, 

On Thu, 6 Mar 2014, Gaudet, Severin wrote:
>  *  Simple Cutout
>      +  For a simple cutout, the user-specified subset is restricted to be a
>         contiguous interval within each dimension of the multi-dimensional
>         science data. The user should *not* be allowed to specify subsets
>         with "gaps" or resampling or anything like that.
>          o  Spatial: a circle (a coordinate and a radius)

I suspect this is a typo or mistake.  Are really saying users would 
request a spatial cutout, which comes back as a rectangular array,
using a circle?  A rectangle specified like the SIA query would do, 
and I'm betting is what you meant.  

The second comment is a request: this would be a good time to get a 
snapshot of where the three documents are.  DataLink, of course, is 
quite mature and the latest version is in circulation.  Could we get a 
posting of the SIAv2, ImageDM, AccessData drafts posted to the DAL 
twiki asap?  (The last available SIAv2 is in the doc repos, dated 
15-nov; is there something newer out there?)  Even if they are 
incomplete or mid-editing, it would be good to know what their status 
is and what needs to happen to make the goal.  I would very much not 
like to drafts show up at the last minute, certainly, but I would also 
like to see more collaboration throughout the process.

(This is a good opportunity to recommend the use of volute 
[https://code.google.com/p/volute/], or if you are really hip, GitHub, 
as away to share documents that are in progress.)

cheers,
Ray