Labels:text | menu | document | violet | purple OCR: DEFINITION AND REFERENCE OF IMPLICIT VARIABLES BY I/O STATEMENTS Type'pf Statement Define OBEN. R schonhes AnropsNettement sets the record that will be jeed by the next SpQUENTIAL READ Of R. Rchanger may affect the result of the statement's execution: CLOSE. 8 forickt-sq, Binextend WODOSE statement sets both R.next-sq and R.next- POSITION A Echanges · positioning statemerit sets the record that will be read by the next SEQUENTIAL READ Of R. Richarges may affect the result of the statement's execution: SEQUENTIAL Rinest-sq. Rnext-md A SEQUENTIAL &BAD statemerit reads R.next-sq READ R AstikanDistatement, It sets the record that will be rewritten ind deleted by the next REWRITE and DELETE Of Ritt also sets the record that vell be read by the MONT SEQUENTIAL.READ Of R. DIRECT READ R R.changes R.next.sq. R.next-md 'Rchanges may affect the record read by & DIRECT REALIR Statement, The statement sets R.next-sq. It It dennes R riekleid in the same way as the ERQUENIT TAL READ A statement. WRITE R Fechaniges AWRITE Rstatement writes a record in R. Therefore, fr affects R changes REWRITE? R.next-md E changes. R.next-md AREWRITE AND DELETE Statement rewrites DELETE'R and deletes R.next md in'R. Therefore, it affects `&echangeis it also sets R.next-md to null.
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