Does durable mean what you think it means?

When a database vendor notes a "durable" link, what does that mean?
The American Heritage Dictionary (available through Credo) defines durable as Lasting; stable
The Collins Dictionary (available through Credo) defines durable as Long-lasting; enduring.

LION offers a durable URL link to the information available - poems, etc. LION notes you may post the link in an e-mail or document. The implication is one may send the link and the recipient will be able to click on the link to access the LION document.

The durable link remains durable in the sense I think of "durable" on campus where we have direct access to GALILEO and LION. Yet off campus, the link opens up a screen in LION requesting a log in.

I'm missing something about the long lasting, stable enduring part of the the LION link.