Correction in XML Encryption Syntax and Processing

In the document 'XML Encryption Syntax and Processing'
(http://www.w3.org/TR/2002/REC-xmlenc-core-20021210/)  section 2.0
'Encryption Overview and Examples (Non-normative)' in the XML example I
believe the line

 

<CipherReference URI?>?

 

Should be

 

<CipherReference URI>?

 

Since in the schema for the cipher reference element (section 3.3.1 of the
same document) the URI attribute is required.

 

Kind regards,

 

Tom Auger