In Section 3.1 Setting Serialization Parameters by Means of a Data Model Instance, search for the text "In the case of the use-character-maps parameter", and go down past the XQuery example to the XSLT code. This contains the instruction
/output:character-map[@character eq $char
which is missing a "]" at the end of the fourth line.
Thank you. I've fixed this in the XML source, so it should come
out all right at the next publication.