Breakdown relation on a field related to a glide list

[Blair5]

I am trying to add a breakdown to an incident based indicator. The breakdown source is built on the table that contains the values and now I need to map this breakdown to the incident table.

I'm going to attempt to explain my requirement:

• Indicator is built on the incident table
• Breakdown source is on something called the business capability category.
• The mapping I have SO FAR is cmdb_ci.ref_cmdb_ci_appl.u_business_cababilty. 
• u_business_capability is a glide list and I need to get to the next level of u_category_name.

Since I can't dot walk from the glide list, would I need a PA script? I don't even know exactly how to begin with this? Can someone provide links, steps, how to's on this? 

[Adam Stout]

I use GlideLists for displaying data, but when you use them, assume they are not reportable.  It complicates virtually everything you want to do with the field.

For a breakdown, you should be able to use the list field itself (with no script) but I'm not sure how you will get a breakdown relation to work as they are not scriptable and they require a specific field (sys_id) to work.

[Blair5]

Unfortunately, I don't have the option to use any other field. This is the only field defined on the application table related to the information I need.