[task #15912] VOTable input-output

[Francois Ochsenbein]

Follow-up Comment #3, task #15912 (project gnuastro):

I'm not sure to understand what is a "MACRO" in the first item about semantics
in comment #2 ?

Yes a PARAM is like a FITS keyword — the problems with FITS keywords (other
than the standard ones described in the FITS documents) is that they lack a
lot of details (units, explanations, possibility of arrays, precision, etc.).

About parsing a VOTable in C, a colleague wrote a set of functions based on
libxml2 which seems to work well − I should check whether it could be
reused; it is rather small (1000 lines) but it only  deals with TABLEDATA
(pure xml) serialization. On the other hand, the XML structure is simple
enough to envisage a dedicated code for VOTable without the complex machinery
of libxml2...

There is also the code in the voclient by Mike Fitzpatrick:
https://github.com/mjfitzpatrick/voclient/blob/master/libvotable/votParseP.h

Cheers, François











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