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lib/Astro/FITS/HdrTrans/Base.pm  view on Meta::CPAN

To convert from generic to FITS the interface is:

  %fits_subset = $class->from_GENERIC_KEYWORD( \%generic_header );

ie multiple FITS keywords and values can be returned since in some
cases a single generic keyword is obtained by combining information
from multiple FITS headers.

Finally, if this translation module is to be part of the
C<Astro::FITS::HdrTrans> distribution the default list of translation
classes must be updated in C<Astro::FITS::HdrTrans>. If this is to be
a runtime plugin, then the list of classes can be expanded at
runtime. For example, it should be possible for
C<Astro::FITS::HdrTrans::MyNewInst> to automatically append itself to
the list of known classes if the module is explicitly loaded by the
user (rather than dynamically loaded to test the headers).

Some generic keywords actually return scalar objects. Any new instruments
must consistently return compatible objects. For example, UTDATE,
UTSTART and UTEND return (currently) Time::Piece objects.