kettle---用户手册（1：介绍spoon）

继续我们这一块的工作。

pan:pan是一个数据引擎，从不同的数据源读取，转换和写入数据。

kitchen：是一个程序，用来执行job。

Transformations and Jobs可以听过xml文件或者数据库里的信息来描述自身的行为。

下表列出转换中的一些定义：

Transformation	Description
Value	Values are part of a row and can contain any type of data: strings, floating point numbers, unlimited precision BigNumbers, integers, dates or boolean values
Row	A row consists of 0 or more values that are processed together as a single entry.
Input Stream	A stack of rows that enters a step
Hop	A graphical representation of one or more data streams between two steps; a hop always represents the output stream for one step and the input stream for another — the number of streams is equal to the copies of the destination step (one or more)
Note	Descriptive text that can be added to a transformation

 job的一些定义：

Job	Description
Job Entry	A part of a job that performs a specific task
Hop	A graphical representation of one or more data streams between two steps; a hop always represents the output stream for one step and the input stream for another — the number of streams is equal to the copies of the destination step (one or more)
Note	Descriptive text that that can be added to a job