That's false. Here is the HTML again, augmented with a link relation which by its nature is perfectly understandable to a program.
<a href="/accounts/12345/deposits" rel="https://schema.org/DepositAccount">deposits</a>
Anyone can coin a link relation on the Web, as long as its identifier is a URI. Tokens are reserved and need to be registered at IANA: https://www.iana.org/assignments/link-relations