odd DIH $docBoost/multiValued="true" issue

[Erik Hatcher]

I've got a situation where I'm bringing in a document boost factor  
from some XML (which comes from another entity in the DIH pipeline).   
It maps in like this:

   <field column="$docBoost" xpath="/doc/@boost"/>
I got a parse exception (in DocBuilder where it parses $docBoost)  
because the value is an array.  I do have a catch-all in my schema:

     <dynamicField name="*" type="string" multiValued="true" />

When I set multiValued to false, it all worked fine.

Thoughts?

Thanks,
        Erik