Oracle 10g (10.2.0.4) or 11g (11.0.1.6)

Can I have two EXTPROC_CONNECTION_DATA in the tnsnames.ora?

For example:

In the same tnsnames.ora file:
++++++++++++++++++++++++++++++++++++++
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC2))
)
(CONNECT_DATA =
(SID = PLSExtProc_2)
(PRESENTATION = RO)
)
)

EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(Key = EXTPROC1))
)
(CONNECT_DATA =
(SID = PLSExtProc_1)
(PRESENTATION = RO)
)
)
++++++++++++++++++++++++++++++++++++++

is the above format allowed?

thanks!