Tagging level 1: Astro-ph

Here is a first attempt to "rationalize" (as Sean Carroll puts it) the amount of information in astro-ph. First round of tagging.
Interesting, but perhaps it could go a bit further: do I hear ontology?

Here's part of the post from From Cosmic Variance:

By popular request, the Astrophysics (astro-ph) archive has been split into six subcategories:

CO Cosmology and Extra-Galactic Astrophysics
EP Earth and Planetary Astrophysics
GA Galactic Astrophysics
HE High Energy Astrophysical Phenomena
IM Instrumentation and Methods for Astrophysics
SR Solar and Stellar Astrophysics

For more information, see the subcategory descriptions at http://arxiv.org/archive/astro-ph (including links to the subdivided new and recent listings). This split should make announcements of new papers more manageable for those interested only in subsets of astro-ph. New astro-ph submissions must assigned one or more sub-categories. (Existing astro-ph articles will be machine-classified according to the new scheme when enough training data has been collected.)