The optional deleteMethodsIfAbsent argument enables you to specify whether you want to delete methods that exist in the JADE database but are not defined in the incoming schema file.
The value of this argument defaults to the value of the deleteIfAbsent argument. For example, if you want to delete the methods in the JADE database that are not in your schema file but you want to retain existing interfaces, classes, and properties that are not in the incoming file, specify:
schemaFile=d:\jade\scm\test.scm ddbFile=d:\jade\scm\test.ddb deleteIfAbsent=false deleteMethodsIfAbsent=true