Qualifiers Question

Hello,
 
I have an XQuery grammar question. From the current working document,
http://www.w3.org/TR/2002/WD-xquery-20020430 
The example in question:
 
Section 4.4 Queries on Sequence
the third example 
 
for $p in //procedure
where some $i in $proc//incision satisfies
        empty($proc//anesthesia[. precedes $i])
return $p
 
 
 
I believe $proc//anesthesia matches the relative path expression:
RelativePathExpr
 
For the Qualifiers predicate that follows it, [. precedes $i]   I can
find no expression that would match.
 
The parse at that point has identified ........... PrimaryExpr  ->
FunctionCall  -> RelativePathExpr
 
FunctionCall would have to consume its' right paren before PrimaryExpr
could match Qualifiers
 
The RelativePathExpr is idendtifying a sequence of nodes and Qualifiers
predicate filters node sequences. So I think the example is right. Am I
missing something or is the grammar? Enlighten me please.
 
 
Margaret Green