There are many ways to accomplish this (in general). My favorite is that you can create 'computed' properties on the fly which means you can continue to keep the strongly typed object in the pipeline, and still have access to the data you care about.

https://technet.microsoft.com/en-us/library/ff730948.aspx

You use the exact same functions (first, last, substring, replace, etc) as you would normally. Then the rest of the pipeline has it available if needed.