STORE <OUT=>item-store-name </ LABEL='label'>;
The item-store-name is a usual one- or two-level SAS name, like the names that are used for SAS data sets. If you specify a one-level name, then
the item store resides in the WORK library and is deleted at the end of the SAS session. Since item stores usually are used
to perform postprocessing tasks, typical usage specifies a two-level name of the form libname.membername.
If an item store by the same name as specified in the STORE statement already exists, the existing store is replaced.
You can add a custom label with the LABEL= option in the STORE statement after the slash (/). When the PLM procedure processes an item store, the label appears in the PROC PLM output along with other identifying information.