Q H&B: "Exp" tag; is that exposed to reports or only invoices?

Q 2008 H&B.

Cashflow registers have an available tag for reimbursable expenses, Exp (shown in the splits window, or in the two lines per transaction configuration).

I think that tag is intended so that you can add reimbursable transactions to invoices.

Is it exposed to any reports, or is it limited to only invoices?

Thx, Bartt