I see this as an almost scientific/scholarly exercise in modeling. While the author seems not to start with any intent to "do science" he or she tries to capture a concrete phenomenon abstractly in order to study it more closely, which is arguably at the heart of science or at least some of the sciences.

The post is "almost" scholarly because it does not try to look into what others did before or currently, eg. prior attempts at notation of dance. I would be very surprised if there weren't any. Modeling cultural practices is also somewhat of a hot topic in the so called "Digital humanities" for what that is worth. A quick search for example brought up this article which talks about Dance Studies and attempts at digitization:

https://humanitiesfutures.org/papers/digital-research-in-dan...

Anyways "ornithology for birds" is pretty fitting as this seems to just be anthropology for humans.