Thank you. Yes, they are the aliases.
For example, Pinniped_Rookeries field aliases are: Location ( type: esriFieldTypeString , alias: Location , length: 254 )
and Sp_Com_Nam ( type: esriFieldTypeString , alias: Sp_Com_Nam , length: 254 ) and the Pinniped locations field aliases are: Com_Name ( type: esriFieldTypeString , alias: Com_Name , length: 254 ) and Location ( type: esriFieldTypeString , alias: Location , length: 254 )
Widget code:
<name>Pinniped_Rookeries</name>
<fields>
<field name="Sp_Com_Nam" alias="Common Name" popuponly="true"/>
<field name="Location" popuponly="true"/>
</fields>
</layer>
<layer>
<name>Pinnipeds NMFS 2007</name>
<fields>
<field name="Com_Name" popuponly="true"/>
<field name="Location" popuponly="true"/>
</fields>
</layer>