Definition: Currency of transaction
External debt - IMF
The medium of exchange in which an individual transaction occurs. It may be currency, goods, or services. The medium of exchange of one transaction (for example, disbursement) does not necessarily determine the medium of exchange of another (for example, repayment).
International Monetary Fund (IMF), "External Debt Statistics: Guide for Compilers and Users; Appendix III. Glossary of External Debt Terms", Washington D.C., 2003