The ability to identify and distinguish between the wide variety of celestial
objects benefits from application of a systematic and logical nomenclature.
This often includes value-added information within the naming convention which
can aid in placing the object positionally either via an RA/DEC or l,b
concatenation. All new nomenclatures should be created following IAU
guidelines. However as the number density of specific object types on the sky
increases, as in the case of PN in external galaxies, a useful positional
identifier becomes problematic. This brief but timely paper attempts to
progress the debate on this vexing issue for the case of extragalactic
planetary nebulae (EPN). There is a clear need to rationalise the current
ad-hoc system now that many thousands of Extragalactic PN are being discovered.Comment: 3 pages, no figures, LaTeX, to be published in Proceedings of the ESO
workshop on Planetary Nebulae beyond the Milky Way held at ESO, Garching, May
19-21, 200
