Message
article-version with @vocab="jav" should have correct @vocab-identifier
Rule XPath:
This rule ASSERTS the following, raising an alert if FALSE:
not(lower-case(@vocab) = 'jav') or @vocab-identifier = ('http://www.niso.org/schemas/jav/1.0/',
'http://www.niso.org/publications/rp/RP-8-2008.pdf')