Presenting / printing Right Ascension and Declination values

Are there any standards or established practices on how to write / represent Right Ascension (RA) and Declination (DEC) values in the sexagesimal format?I have seen all of the following. E.g. for RA:02 03 04 (assumed to mean 2 hours, 3 hourly minutes and 4 hourly seconds)2 3 4 (same as above)2h 3m 4s (same as above)2d 3' 6" (assumed to mean 2 degrees, 3 degree minutes and 4 degree seconds)2d 3m 6s (same as above)15.33 (assumed to mean 15.33 degrees)9.5H (assumed to mean 9 hours, 30 hourly minutes and zero hourly seconds)8d 3.5 (assumed to mean ...Read more