Map

A map reference must have class='map'.

In OBO maps are called out in the manuscript by [class:map].

Do not capture [map] from the citation title to XML.

A reference to a map usually contains components corresponding to the attributes of bibItem listed in the table below:

Relevant attributes of bibItem

Attribute	Description
author	Creator of work
class	`map`
date	Date work created or published
dateEnd	End date of a range starting in the date field
edition	Edition of work
idnumber	Any additional Identifying number of work
place	Location a work was published or where it is housed
publisher	Entity responsible for publishing the work
title	Title of the work
url	URL of an online resource

U.S. Geological Survey. Eastford quadrangle, Connecticut [map]. 1:24,000. 7.5 Minute Series. Washington D.C.: USGS, 1971.


      <bibItem class="map" author="U.S. Geological Survey" title="Eastford quadrangle, Connecticut" extent="1:24,000" seriesTitle="7.5 Minute Series" place="Washington D.C." publisher="USGS" date="1971">U.S. Geological Survey. Eastford quadrangle, Connecticut [map].  1:24,000. 7.5
        Minute Series. Washington D.C.: USGS, 1971. </bibItem>