Optional
For changed: the field that differs (name, cardinality, facet, optionality, …).
changed
name
cardinality
facet
optionality
XML path of the node: in the new document, or in the old one for removed.
removed
The specification's name (the new one when it was renamed).
One plain-language line.
For
changed: the field that differs (name,cardinality,facet,optionality, …).