DAL: Defining Oracle Image Identifier

I have several instances of Oracle installed on my system. How does DAL know which one to look at?
The DAL Oracle database adapter, as supplied, is linked with the Oracle Image Identifier "S". If your installation selected a different image identifier, two assign statements must be supplied in either the system login file or the user's login file to point DAL to the correct Oracle images:

- Oracle 5.1.22

$assign/nolog device:[directory]ORACLEx.EXE ORACLES
$assign/nolog device:[directory]ORACRTLx.EXE ORACRTLS

where "x" is the Oracle Image Identifier.

- Oracle 6.0

$assign/nolog device:[directory]ORACLEx.EXE ORACLES
$assign/nolog device:[directory]ORACRTLx.EXE ORA_CRTLS

where "x" is the Oracle Image Identifier.
Published Date: Feb 18, 2012