Attribute selector

CSS2 draft:
"For example, the following rule matches all H1 elements that specify the
"href" attribute, whatever its value:

H1[href] { color: blue; }"

Now, H1 doesn't take the href attribute. Does the above rule apply to H1's
children or is it merely an abstract example?

p.s.
You've done a fantastic job.Congratulation
/e