About the Exclusive Canonicalization Specification
The Exclusive Canonicalization Recommendation has been produced
by the IETF/W3C
XML Signature Working Group.
This document lists the known errata to the Exclusive
Canonicalization specification. Each entry has the following
- A unique entry number.
- The date it was added to the errata page.
- Whether the entry is considered:
- an Error that affects the conformance
and/or interoperability of syntax and processing,
- an Editorial error, such as a
- a structural defect in the Document,
such as an incorrect fragment identifier,
- a Clarification with respect to a
misstatement or misinterpretation of the specification,
- a Caveat where subsequent experience has
shown that a recommendation of the specification was
incorrect or needs further qualification.
- The version and section referred to.
- A description of the problem and correction if applicable.
Please report errors in this document to the editor and cc: the
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Exclusive XML Canonicalization Version 1.0
- E01 2002-10-03 (Editorial)
- In section 2.2
General Problems with re-Enveloping, two examples have an
incorrect attribute value for the
xml:space="retain" should be
- E02 2002-10-03; updated 2009-08-04
- In section 4
Use in XML Security, the data type of the
attribute value is specified as NMTOKENS in both the DTD and
Schema. This does not permit
or the occurrence of the '
#default' token in the
attribute value because of the "#" character.
the type of this attribute value should
be CDATA in a DTD and/or xsd:string
in a XML Schema.
- See also: corrected
schema document; corrected
- E03 2003-07-01 (Editorial)
- In section 1.1
Terminology, the term "visible" should be replaced with
the term "visibly
utilized" yielding "... namespace nodes that are not on
theInclusiveNamespaces PrefixList are expressed only in
start tags where they are visibly
utilized and if they are not in effect from an output
ancestor of that tag." A similar replacement in section 1.3
Limitations yields, "... the XML must be modified so that
use of the namespace prefix involved is visibly
utilized, or ..."
- E04 2003-07-02 (Editorial)
- In section 3.
Specification of Exclusive XML Canonicalization, rule 3
needs to be read to include non-empty default namespace
declarations, consequently it should read as,
- A namespace node N with a prefix that
does not appear in InclusiveNamespaces
PrefixList is rendered if all
of the conditions are met:
- E05 2006-08-08 (Editorial)
- In section 3.1
Constrained Implementation (non-normative), the numbering
of bullet points is incorrect.
- E06 2006-08-08 (Editorial)
- In section 5.1
Target Context, the examples should read
- E07 2009-08-04 (Clarification)
In section 1.1, the definition of "visibly
utilizes" is imprecise in the discussion of which
attribute nodes are used in the determination of prefix
utilization on an element.
The definition should read:
"An element E in a document subset visibly
utilizes a namespace declaration, i.e. a namespace prefix P
and bound value V, if E or an attribute node
in the document subset that is also in E's attribute
axis has a qualified name in which P is the namespace
prefix. A similar definition applies for an element E
in a document subset that visibly utilizes the default
namespace declaration, which occurs if E has no
- E08 2010-12-15 (Clarification)
In section 3. Specification of Exclusive XML Canonicalization, rule 2 needs to be read to require ignoring
prefixes that are never encountered during the processing of
the node set, rather than treating them as errors or
attempting to output them in some way. It should read:
The Exclusive XML Canonicalization method may receive an additional, possibly null, parameter InclusiveNamespaces PrefixList containing a list of namespace prefixes and/or a token indicating the presence of the default namespace. All namespace nodes whose prefixes appear on this list are handled as provided in Canonical XML [XML-C14N]. If prefixes appear on this list but are not encountered in the course of processing the node set, they are ignored.