Parent DOI of a single article
For a single article (root element is e), if the module ISBN or parent ISBN is provided, then insert a metaDescribes element with attribute predicate="parentDOI".
The ISBN in the parent DOI must match the ISBN in the article's DOI.
<metaDescribes predicate="parentDOI">10.1093/oxfordhb/9780199697960.001.001 </metaDescribes>