It is not possible to query SODA services by MOC

[Bonnarel]

MOC (as well as STMOC, and maybe STEMOC) has proven to be a very efficient way to describe coverage of data and is used for discovery of data. It has been often discussed and also during last interop that it should be useful to query SODA services by MOC ? It should probably be with a new parameter and not via POS considering that it is probably more useful to have STMOC or STEMOC, than spatial MOC alone. This is also valid for SIA of course (SIA Issue #9). Of course the behavior for SODA will be very different than the one with SIA. SODA-(ST)MOC will extract a subset matching the (ST)MOC while SIA-MOC will only select datasets intersecting with the MOC. I wonder if this new parameter should not be standardized by DALI

[Bonnarel]

What could be the datatype for a MOC ? apparently it should be a char array to use the string serialization. This could work also for STMOC

[pdowler]

WD-DALI-1.2 specifies an xtype="moc" to be used with the ascii serialisation in the latest standard. The type tuple would be

datatype="char" arraysize="*" xtype="moc"

It would seem straightforward to specify a MOC parameter that takes an ascii moc value for input.

[Bonnarel]

Possibly solved by PR #11