Container element for information concerning the article that identifies or describes the article.
The following, in order:
Any combination of:
<permissions> Permissions, zero or one
<self-uri> URI for This Same Article Online, zero or more
<related-article> Related Article Information, zero or more
<abstract> Abstract, one or more
<kwd-group> Keyword Group, zero or more
<funding-group> Funding Group, zero or more
<conference> Conference Information, zero or more