Looping back on this, I’m surprised to find I can natively set a term-to-term relationship across terms in two different taxonomies (person and company) using wp_set_object_terms() …
$term_taxonomy_ids = wp_set_object_terms( $bill_term_id, $microsoft_term_id, 'company' );
They are just objects.
And I can retrieve the company connected to a person with wp_get_object_terms like…
$bills_company_terms = wp_get_object_terms($bill_term_id, 'company');
However, putting a backend UI on that is another matter. Don’t know how to accomplish that. Any ideas?
