埋め込みの説明
@1@ : STD
例題
[C9021.cob] 000001 @OPTIONS FLAGSW(STDM) 000002 IDENTIFICATION DIVISION. 000003 PROGRAM-ID. C9021. 000004 ENVIRONMENT DIVISION. 000005 DATA DIVISION. 000006 WORKING-STORAGE SECTION. 000007 01 REC01. 000008 02 REC-NO PIC X(10). 000009 PROCEDURE DIVISION. 000010 P-START. 000011 MOVE "ABC" TO REC-NO(1:3). 000012 STOP RUN.
C9021.cob 11: JMN9021I-W (STD)部分参照は共通範囲外です．処理を続行します．
