Message
The text within xref should be consistent with the label in the referenced element
Rule XPath:
This rule ASSERTS the following, raising an alert if FALSE:
(every $rid in tokenize(@rid, '\s+')[. ne ''] satisfies
matches(key('element-by-id', $rid)/label[1], concat('(\s+|', local:escape-for-regex(normalize-space(.)),
'\.?$)'))
) or not(@ref-type = ('aff', 'author-notes', 'fn', 'table', 'fig'))