Complex Data Type Select

Hello,

This question was probably asked before but I was unsure of what term to search.  But I am trying to use a custom data type that I built with 2+ values defined.  This will be a drop down list where users will choose the friendly name of the variable.

Attached to this name is a guid and an xml string,  using workflow components, how would i pull the guid and xml based on what value the user selects?

something like a,  Select GUID where name = 'Application A'