If you specify the third optional operator argument, you can test for a particular relationship. The possible operators are , lt, , le,, gt, , ge, , , eq, ! ,, ne respectively. Using this argument, the function will return 1 if the relationship is the one specified by the operator, 0 otherwise.

(2005). The relationship between article 5, paragraphs 1 and 3, of the OECD Model Commentary. Intertax, No. 4 (April), p. 189.

3. Human Rights in the relationship between the European Economic Community (ECC) and African, Caribbean and Pacific Countries (ACP), Advanced University degree thesis, Nancy, 1990.