Metadata for presence of media
If source data contains a figure, then capture this metadata at the root level.
Capture this in a metaItem element with about="hasMedia". This should contain a metaDescribes element with attribute predicate="DOI", containing the DOI of the media article.
//metaItem[@about = "hasMedia"]
<metaItem about="hasMedia">
<metaDescribes predicate="DOI">[DOI of a media article]</metaDescribes>
</metaItem>