OBO document element and attributes

The OBO document root element requires id, doi, entry, sortkey, title, docDesc and versionDate mandatory attributes.

OBO document element required attributes

Attribute	Value
id and doi	Only the document element requires a doi attribute and a list of elements require the id attribute.
sortkey	Formed from the entry title by removing all spaces, punctuation and non-letter characters; converting upper-case characters to lower-case; and normalizing special characters (converting to their base letter). "&" should be replaced with "and". For example, `<title><p>‛Abdülcelil Çelebi.</p></title>` would resolve to sortkey="abdulcelilcelebi" If you revise an article keep the existing value.
title	The title of the work in which the article appears. The value of this attribute is the combination of `obo-` and the ISBN of the entry. Find the ISBN at the top of the entry. It forms part of the id attribute. For example: title="obo-9780195390155"
docDesc	Copy from the first title element in the entry except while expanding & characters to `and` . If you revise an article keep the existing value.
versionDate	The version date of the entry (or update to the entry). Overwrite any existing information in the versionDate attribute. Find the date at the top of the entry manuscript to be converted. Capture the date in ISO format (`YYYY-MM-DD`) Ask your contact at OUP if you cannot find a date on the entry manuscript. For example: versionDate="2009-05-25"

Example of a new entry


      <document id="obo-9780195390155-0016" versionDate="2009-05-25" title="obo-9780195390155" sortkey="civilsociety" docDesc="Civil Society">
        <titleGroup><title>
 <p>Civil Society</p></title>
        </titleGroup>
        <textMatter><p>...</p>
        </textMatter>
      </document>