links

What is the difference between Hints and Links?

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Hi.

I've been studying optimal hinting techniques for correct screen display of typefaces. I've read tens or hundreds of pages of text about hinting, and I've taken quite a few stabs at googling it (the word "link" is a pretty useless search term on the internet).

Still I can't still quite grasp the difference between a hint and a link. Could someone here explain it to me?

Regards,
S.