ART_SPEC ( TABLE_NAME ( [ database-name . ] table-name ) , [ ID_SEQUENCE ( instance-identifier-list-json-string ) , ] [ PAYLOAD ( FIELDS ( field-list ) , CONTENT ( { REAL | COMPLEX | AMPL_PHASE | AMPL_PHASE_RADIANS | AMPL_PHASE_DEGREES | MULTIVAR_REAL | MULTIVAR_COMPLEX | MULTIVAR_ANYTYPE | MULTIVAR_AMPL_PHASE | MULTIVAR_AMPL_PHASE_RADIANS | MULTIVAR_AMPL_PHASE_DEGREES } ) ) , ] [LAYER ( layer-name ) ] );