JATS-0021-002
$pub-format issn contained within <journal-meta/> "." must match corresponding issn contained within Issue XML "$issue-issn"
JATS-0021-004
issn has incorrect value "." due to format (expected 1234-567X) or checksum (expected local:ISSN-checksum(.)). Verify that the ISSN is correct and place any text such as "ISSN" outside of the
element.