macros in abap hr

Hi Experts,

can any 1 tell me what is the meaning of the below macros:

RP_PROVIDE_FROM_LAST P0000 SPACE PN-BEGDA PN-ENDDA.

RP_PROVIDE_FROM_LAST P0006 '1' PN-BEGDA PN-ENDDA. "M01

RP_PROVIDE_FROM_LAST P0105 '9999' PN-BEGDA PN-ENDDA.

RP_PROVIDE_FROM_LAST P0002 SPACE PN-BEGDA PN-ENDDA.

RP_PROVIDE_FROM_LAST P0007 SPACE PN-BEGDA PN-ENDDA.