When a source member is built directly, either as the input member to the build or by an INCLD statement, the output member name is determined from information in the project definition or by SCLM defaults. If the FLMALLOC statement for the output specifies a default member name using the DFLTMEM parameter then that member name will be used. When no default member name is specified, the output member name will be the same as the source member. Use an architecture definition when generating multiple outputs to be stored in a partitioned data set. See the description of Multiple build outputs.