The data on variability type are taken from the GCVS and NSV
Catalogues (see field 39). The abbreviations given in Table V2 
follow the main classes of variability (eruptive, pulsating, rotating,
cataclysmic, eclipsing, and X-ray variable stars). If the 3-letter code used
here is an abbreviation of the type of variability given in the two source
catalogues, the complete designation is given in Table V2
(page ) between brackets:
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