(Note: it's very hard to describe the location of text fragments in this section with clarity! Table numbers, or something similar, would really help.)

para 2 typo, missing space after first "}".

In the XML Representation Summary, {prohibited substitutions}, "otherwise on the actual value", should "on" be "to"? In the Note, typo, missing space in "restriction orextension".

In {assertions} the reference to the <restriction> and <extension> elements seems informal (in comparison with the equivalent in {annotations}), perhaps it should say "the <assert> element information items among the [children] of the <complexType> and among the [children] of the <restriction> and <extension> [children] of its <complexContent> or <simpleContent> (?) [children], if any, in order".

Under "Complex Type Definition with complex content Schema Component":

{content type} rule 1 (mixed), it's not clear that cases 1.1 and 1.2 are mutually exclusive. Should 1.2 be "otherwise, if..."?

In the second of the three notes following the big table, that is, the "Note: Aside from the simple coherence requirements..." this sentence is VERY hard to parse. (If you make the mistake of reading "constraining" as "which constrain", then the verb "is" has no subject, and when you eventually discover this, you have to backtrack a long way to recover).

The sentence "Careful consideration of the above concrete syntax reveals " seems to add little. Even more careful consideration reveals that you don't even need the name, so <complexType/> is also allowed. So what?

In the Examples, there appear to be instance fragments and schema fragments, with no explanation indicating the boundaries between them. (The xmlspec markup allows Examples to have titles, which would make them easier to refer to.) The use of "daughter" seems alarming, since when did children acquire a gender?