font matching algorithm

CSS2, section 15.5, step 2:

Step 2 says that you use "the complete set of properties", starting with
the font-family, to find a match. At the end of section 15.5, just
before 15.5.1, is the ordered list of remaining properties, but 2
properties are conspicuously missing: font-stretch and font-size-adjust.

Now, the font-size-adjust spec seems to me to indicate that it is for
step 3 of the algorithm, so it can probably be ignored in step 2.
(Right?)

But what about font-stretch? Where does it fall in the ordered list of
properties? And what is the spec for matching it?

Thanks,

Erik