Logical Names
Search lists
$ DEFINE lnm string_1,string_2
Each item of a search list has its own “index” value:
string_1 - index 0
string_2 - index 1
Notes:
Logical names can have more than one translation. These are called “search list” logical names.
Each translation of a search list logical name is referred to by its “index”. We’ll discuss that when we look at the F$TRNLNM() Lexical function.