REC for ASCII MOCs

[Markus Demleitner]

Dear Apps folks,

In the context of adding information on the STC coverage of resources
(that's VODataService 1.2), we in Registry need an ASCII
serialisation of MOCs, because the things should come embedded in
Registry records (see the Registry-STC roadmap at
http://ivoa.net/documents/Notes/Regstc/index.html for our rationale).

Now, we like a lot the proposed syntax in 3.1.2 of the current MOC
REC -- it's reasonably compact and readable.  But it's not a
standard, just a suggested syntax.

Since we'd like to use in in a REC, the ASCII MOC needs to be
specified in a REC, too.  So -- how do you feel about a small update
to MOC that takes 3.1.2 and promotes it to a normative section 2.3.3?

An alternative would be to take ASCII MOCs to DALI.  In the end, DALI
will probably have to say something about MOCs anyway, as we'll need
an xtype=MOC if we want to (interoperably) exchange MOCs in VOTable
columns (which I want pretty much).  If we touch DALI, it might be a
little less work if DALI described the format itself (we'd touch only
one standard, not two of them).

Opinions?

         -- Markus