Contract
The canonical model, pricing, fees, documents, signatures, notarisation and title.
What are the documents and the numbers?
The largest category, and the one carrying the model everything else is expressed in. Lexicon is the ontology as a served product; the rest of the category produces the documents and the figures a closing requires.
Documents are generated from the canonical record rather than entered separately, which is what keeps the package and the loan from disagreeing.
Products
In the order the value chain runs.