Available on both the COPY-DATASET and COPY-TEMP-TABLE methods, the name-prefix argument is an optional character expression used as the prefix for naming the target ProDataSet or temp-table, respectively, when the target has as yet no definition. If the parameter is not passed or is passed as the Unknown value (?), the AVM uses the default "cpy_" prefix. If the parameter is passed as an empty string "", then no prefix is added and the target ProDataSet or temp-table will have the same name as the source.