Export the metadata and data only with CONTENT option in EXPDP datapump

For EXPDP Metadata only:
It will export the metadata of the schema excluding the data.
expdp HR@ORCL directory=DBBACKUP dumpfile=HR.dmp logfile=HR.log content=METADATA_ONLY

For EXPDP data only:
It will export the data only, it will not create the schema with metadata, it only used for import data which already has similar schema structure.
expdp HR@ORCL directory=DBBACKUP dumpfile=HR.dmp logfile=HR.log content=DATA_ONLY