1.
Transformation代表Informatica Server对数据的操作。
Transformation分类：Active和Passive
输入跟输出的记录数会发生改变
不能re-linked到另一个data stream
例子：Aggregator, Filter, Joiner, Normalizer, Rank, Update Strategy, Advanced External Procedure,
ERP Source Qualifier and Source Qualifier, Application Source Qualifier, Router, Sorter
Passive transformations
输入跟输出的记录数一样
可以re-linked到另一个data stream
例子：Expression, External Procedure, Lookup, Sequence Generator Stored Procedure, Input,
Output, XML Source Qualifier
Transformations分类 : connected 和 unconnected,unconnected transformation在其他的组件中被调用并且有返回值。