The latest CRISPR -
Cas classification scheme delineates two classes that are each subdivided into three types.
Not exact matches
Included in the category are white dwarfs, and as
can be seen from the radically different
classification scheme for class D, non-stellar objects are difficult to fit into the MK system.
As far as I
can see the main novelty is that the weather station
classification scheme of Leroy (2010) is better than Leroy (1999).
Going forward it is to be hoped that more
classification schemes, such as an open caselaw taxonomy, will be published as linked data to continue to provide more richness to what
can be discovered in this way.