属性移动器
典型用途
- 清除具有少量不必要属性的功能
- 通过删除不需要的属性来提高性能
How does it work?
一旦连接到输入功能,attributereMover提供了选择列表(一个用于属性,一个用于列表属性),供您选择要删除的特定属性。保留所有其他属性,并输出修改后的特征。
![关闭](http://www.baooytra.com/docs/fme/2017.0/html/FME_Desktop_Documentation/FME_Transformers/Skins/Default/Stylesheets/Images/transparent.gif)
在这个例子中,several attributes are selected from the pick list for removal.
要移除参数的属性由这些选项填充。
随着特性退出变压器,the selected attributes have been removed:
使用说明
- 考虑使用属性管理器instead
- 使用散货属性移动器删除与模式匹配的所有属性。
- 使用属性keeper在特征上保留选定的单个属性。
- 删除属性可以提高工作台的性能,making translations run more efficiently and the Workbench interface respond more quickly.
Configuration
Input Ports
![关闭](http://www.baooytra.com/docs/fme/2017.0/html/FME_Desktop_Documentation/FME_Transformers/Skins/Default/Stylesheets/Images/transparent.gif)
The feature type that contains the attributes you want to remove.
输出端口
![关闭](http://www.baooytra.com/docs/fme/2017.0/html/FME_Desktop_Documentation/FME_Transformers/Skins/Default/Stylesheets/Images/transparent.gif)
All features are output through this port,删除选定的属性。
参数
![关闭](http://www.baooytra.com/docs/fme/2017.0/html/FME_Desktop_Documentation/FME_Transformers/Skins/Default/Stylesheets/Images/transparent.gif)
单击浏览按钮以显示列表对话框。选择要从功能中删除的属性。未选中的属性将被保留。
![关闭](http://www.baooytra.com/docs/fme/2017.0/html/FME_Desktop_Documentation/FME_Transformers/Skins/Default/Stylesheets/Images/transparent.gif)
连接好变压器后,单击“浏览”按钮并选择要删除的列表。
Note that if you select to remove a list,您的选择将包括任何列表属性或嵌套列表。For example,如果选择删除名为
列表
然后列表.attr或list{}.sublist{}
will also be removed.
编辑变压器参数
使用一组菜单选项,可以通过引用工作区中的其他元素来指定变压器参数。More advanced functions,例如高级编辑器和算术编辑器,are also available in some transformers.要访问这些选项的菜单,点击在适用参数旁边。更多信息,see变压器参数菜单选项.
定义值
There are several ways to define a value for use in a Transformer.The simplest is to simply type in a value or string,它可以包含各种类型的函数,例如属性引用,math and string functions,and workspace parameters.There are a number of tools and shortcuts that can assist in constructing values,通常可从值字段旁边的下拉上下文菜单中获得。
![关闭](http://www.baooytra.com/docs/fme/2017.0/html/FME_Desktop_Documentation/FME_Transformers/Skins/Default/Stylesheets/Images/transparent.gif)
Using the Text Editor
The Text Editor provides a convenient way to construct text strings (including regular expressions) from various data sources,比如属性,参数,and constants,其中结果直接在参数内部使用。
Using the Arithmetic Editor
The Arithmetic Editor provides a convenient way to construct math expressions from various data sources,比如属性,参数,以及功能,其中结果直接在参数内部使用。
条件值
根据通过或失败的一个或多个测试条件设置值。
内容
表达式和字符串可以包含多个函数,characters,参数,and more - whether entered directly in a parameter or constructed using one of the editors.
参考
Processing Behavior |
|
Feature Holding |
不 |
依赖项 | 无 |
FME Licensing Level | FME基础版及以上 |
别名 | 列表删除程序 |
History | |
类别 |
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