Message
article-version for JAV 2026 with @content-type="semantic-version-number" should have @designator containing a semantic version number
Rule XPath:
This rule ASSERTS the following, raising an alert if FALSE:
not(@vocab-identifier = 'http://www.niso.org/schemas/jav/1.0/' and @content-type =
'semantic-version-number') or matches(@designator, '^\d+(\.\d+)?(\.\d+)?$')