Ontology schema
File layout and field definitions for domains, tables, joins, and metrics.
The format follows the Open Knowledge Format (OKF): knowledge is stored as an open, portable file tree that people and agents can read directly and review in git. Cassis provides the analytics-specific profile documented here, with validated structures for domains, tables, columns, joins, and metrics.
Two complete example trees are yours to copy: a minimal one as a skeleton, and a fully authored one for a fictional marketplace.