Jdl is an interpretative language system . it has data types , expression , control flow statements and user - defined function just like the imperative programming language , but also has data types and statements such as job control statements , task control statements , wait statement , parallel statement and monitor statements particular to jms Jdl是一種解釋型語言系統(tǒng),既有一般命令式語言所具有的數(shù)據(jù)類型、表達(dá)式、控制流語句和用戶自定義函數(shù)等要素,也另有作業(yè)管理系統(tǒng)所特有的數(shù)據(jù)類型、作業(yè)控制語句、任務(wù)控制語句、等待語句、并行語句和監(jiān)聽語句等。