[Bugzilla bug (if applicable)] Bugzilla bug 6808 [Erratum (if applicable)] None [Category] Substantive [Affected sections] 5.1.4 XML Output Method: the indent and suppress-indentation Parameters [Description of change] 
Relaxed rules for the XML output method that specify where a serializer is permitted to add whitespace. This introduces an incompatibility only inasmuch as the serialized results produced by a serializer conforming to this specification could differ from the results a serializer that adheres to [XSLT 2.0 and XQuery 1.0 Serialization (Second Edition)] would be permitted to produce.