The CV2VIEW Procedure

FROM_VIEW= Statement

Specifies the name of the view descriptor or access descriptor that you want to convert

Restriction:	If you specify DBMS=ALL, then you cannot use the FROM_VIEW= statement.
Requirement:	You must specify either the FROM_VIEW= statement or the FROM_LIBREF= statement.
Requirement:	The FROM_VIEW= and TO_VIEW= statements are always used together.

FROM_VIEW=libref.input-descriptor;

libref: specifies the libref that contains the view descriptor or access descriptor that you want to convert.
input-descriptor: specifies the view descriptor or access descriptor that you want to convert.