Standard comparison operators: =, <, >, <=, >=, <> or EQ, LT, GT, LE, GE, NE
Logical operators: NOT, AND, OR and brackets to combine elementary conditions
Operators for string analysis: CO, CN, CA, NA, CS, NS, CP, NP
Special unary operators: IS [NOT] INITIAL, IS [NOT] BOUND, IS [NOT] ASSIGNED
sy-subrc <> 0
oref is bound and oref->attr = ‘abc’
( itab[1]-string is initial or not itab[1]-string co ‘0123456789’ ) and ( itab[2]-string is initial or not itab[2]-string co ‘0123456789’ )
( I < J ) AND NOT oref->i GT dref->k OR X = Y[3]-COMP1 OR X = Y[2]-COMP1