The iso2geoBL.xsl transforms the publisher field to the multi-valued element dc_publisher_sm.
However, the official GBL Metadata Schema indicates the singular dc_publisher_s.
Since the Big Ten project uses both the XSLT with GIS records, and NYU's plugin for Omeka with maps, we discovered that we had a mix of dc_publisher_s and dc_publisher_sm in our Solr. We would prefer to use dc_publisher_sm. Any reason why we wouldn't want to enable having multiple publishers?