/sys$common/syshlp/helplib.hlb
RTL Routines, STR$, STR$FIND_FIRST_SUBSTRING
 *Conan The Librarian 

    The Find First Substring in Input String routine finds the first
    substring (in a provided list of substrings) occurring in a given
    string.

    Format

      STR$FIND_FIRST_SUBSTRING  source-string ,index ,substring-index

                                ,substring [,substring...]

  Additional Information (explode) :

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