Entry and exit port for a certain region.
GDR or GDRs :
Global Depositary Receipts, each one representing one GDS.
GDS or GDSs :
Global Depositary Shares, each one representing one Unit.
GDS Depository Institution :
The Bank of New York, responsible for issuing GDSs and GDRs,
under the terms of the Deposit Agreement for GDS Issuance.