Attribute IDs containing Dashes & Resolver Script

[Patrick Rynhart]

I'm attempting to federate with an SP where they are expecting an 
attribute to be called "unscoped-affiliation" (an id containing dashes). 
I will be able to provide the data they want provided I can use a Script.

As per this example:

https://wiki.shibboleth.net/confluence/display/SHIB2/ResolverScriptAttributeDefinition

I am attempting to construct my resolver (in attribute-resolver.xml) as 
follows:

<resolver:AttributeDefinition xsi:type="Script" 
xmlns="urn:mace:shibboleth:2.0:resolver:ad" id="unscoped-affliation">
<Script><![CDATA[
         importPackage(Packages.edu.internet2.middleware.shibboleth.common.attribute.provider);
         unscoped-affliation = new BasicAttribute("unscoped-affliation");
         unscoped-affliation.getValues().add("foo");
     ]]></Script>
</resolver:AttributeDefinition>

The problem is the line:

unscoped-affliation = new BasicAttribute("unscoped-affliation");

which results in the following ECMAScript error:

sun.org.mozilla.javascript.EvaluatorException: Invalid assignment 
left-hand side. (<Unknown source>#2) in <Unknown source> at line number 2

If I remove the dashes (and call my variable unscopedaffiliation) then 
things work, but obviously the SP is expecting unscoped-affiliation.

I have tried using single and double quotes, e.g.

'unscoped-affliation' = new BasicAttribute("unscoped-affliation");

but I get the same problem.

How can I resolve this please ?

Thanks,

Patrick