optional visual-meta fields

@{document-type-start}
Detailed information about the document type
@{document-type-end}

@{author-details-start}
Detailed information about the authors of this paper
@{author-details-end}

@{references-start}
BibTeX list of all the references in this document
@{references-end}

@{document-headings-start}
List of headings in the paper
@{document-headings-end}

@{glossary-start}
Glossary terms and definitions
@{glossary-end}

@{endnotes-start}
Endnotes
@{endnotes-end}

@{custom-start}
This is for publishers to define and to explain what the data is using as plain language as possible
@{custom-end}

@{visual-meta-full-document-text-start}
Contains the full text of the document in column form with clear line breaks. Experimental 
@{visual-meta-full-document-text-end}