It can contain a link to the list of all invoices. So you could have /customer/<...

		rich-tea on May 13, 2019 \| parent \| context \| favorite \| on: Use links not keys to represent relationships in A... It can contain a link to the list of all invoices. So you could have /customer/<cid>/invoice which lists all invoices for the customer which are actually just links of the form /customer/<cid>/invoice/<iid>