The Subject Category Tool is used to assign a numeric code to astronomical visualization products for taxonomy purposes. It is strongly encourged that AVM tagged images use this resource. The full list of taxonomy can be found in the AVM document
on page 34.
Instructions: Choose a Top Level Heirarchy from the drop down menu below. Then choose as many tags as you see fit to describe your astronomical image. A remove button is present if you accidently choose a wrong taxonomy. When finished, press "Submit" and the numeric codes will be embedded in the XML file upon submission of the AVM Web Tool. Make note that at this time, you will not be able to see your entries once you submit the Subject Category tool.