Message
Article with DOI "$doi" and href "$href" should not be duplicated in the toc
Rule XPath:
This rule ASSERTS the following, raising an alert if FALSE:
let $doi := article-id[@pub-id-type = 'doi'] returnlet $href := self-uri[@content-type = 'jats']/@xlink:href returnnot((ancestor::toc//issue-article-meta[article-id = $doi or self-uri/@xlink:href =
$href])[2])