Current model: each annotation has been associated with the yearly theme in which it was written. These themes include Metalworking and Moldmaking, Colormaking, Practical Knowledge, Ephemeral Art, and Impressions.
Proposed new model: match each annotation to the categories assigned to manuscript entries (see #280 Integrate entry category/group assignments)
To be completed after #280
DECISION: Assign essays same entry categories as the entry they deal with most Take from DCE_entry-category-metadata