I'm sure it's a stretch here seeing if anyone knows the answer to this, but I'm trying to come up with an RPL to pull in another RPL from a supplemental table. RPL is Responsys' programming language that is very similar to FreeMarker, so if you know the answer in FreeMarker please share as well.

For example, we have a dynamic variable named "firstname". We are adding the dynamic variable "firstname" to many campaigns, so instead of setting it equal to the RPL to pull in the first name, we want to use a supplemental table to store the RPLs, and reference them in the dynamic variable. That way as we need to, we can update one table to update all campaigns.

I've tried using 

```
<#data table as table>
<#filter variablename = firstname>
<#fields code>
${code}
</#data>

```

Any help is super appreciated!