Is there a way for Firefly to use two VO Table FIELDS to make a hot link?

NED's demo UI can display external references as hot links. See b.ned.ipac.caltech.edu/byname, External References tab.

If a NED VO Table FIELD has a <LINK ... href="<FIELD_NAME"/>, a hot link will be created using <FIELD_NAME> as the href. The service.url can be hidden, so two fields make link.

{{<FIELD ID="ext_col2" name="external_service_name" ucd="service.name" datatype="char" arraysize="*">
<DESCRIPTION>Name of related on-line astronomical service .</DESCRIPTION>
<LINK content-role="query" content-type="text/xml" href="ext_col5"/>
</FIELD>
...
<FIELD ID="ext_col5" name="external_service_url" ucd="service.url" datatype="char" type="hidden" arraysize="*">
<DESCRIPTION>
URL address of related on-line astronomical service .
</DESCRIPTION>
</FIELD>}}
CogE: Jeff