In the first edition of XQuery 1.0, section 3.7.1.2
[Namespace Declaration Attributes] said:
    The value of a namespace declaration attribute must be a
    URILiteral; otherwise a static error is raised [err:XQST0022].

In response to Bug 5083, erratum XQ.E13 changed this to:
    The value of the namespace declaration attribute
    (a DirAttributeValue) is processed as follows.
    If the DirAttributeValue contains an EnclosedExpr,
    a static error is raised [err:XQST0022].
and that's how it appears in 3.7.1.2 in XQuery 1.0 second edition.

All that is fine.

However, in Appendix F [Error Conditions], the recap of XQST0022
still reflects the definition from the first edition:
    It is a static error if a namespace declaration attribute
    contains an EnclosedExpr.

XQ.E13 should have changed it to (something like):
    It is a static error if the DirAttributeValue of a
    namespace declaration attribute contains an EnclosedExpr.

(Note that XQuery 3.0 already has more-or-less this change, since
the 2011-07-17 WD.)