Pattern for Requirement Spec to Filter based on Attribute

Hi all,

We are using requirements and system traceability app to view coverage rate etc.

When i look at fuel system spec the covarage looks 20% this is because not all aircraft requirement was written for Fuel System. I want to apply a pattern to Aircraft spec based on allocated_product attribute, this way i can see, if all aircraft requirement that has fuel system as allocated_product attribute was consumed by fuel system and true covarage rate, but need help for pattern ? can someone provide this pattern?

Thank you.