• 在此示例中，将三个新属性添加到输入功能中：
• UPDATEDBY is added and set to the constant value “Smith”.
• X and Y are added, and set to the feature’s coordinates by extracting geometry with an FME function.

The new attributes are reflected in the transformer, at the top of the attribute list.

属性值已更新，可以在数据检查器的表视图中查看。

Adjacent Feature Attributes are accessed under Advanced: Attribute Value Handling. When turned on, you can specify a number of features preceding and following the current feature to reference in calculating new values.

假设我们给出了以下数据集：

If the现有功能数量andNumber of Subsequent Features参数都设置为2，然后读取第一个功能时，attributecreator可以访问以下功能：

请注意，某些属性丢失，因为第一个功能之前没有存在功能。

读取第二个功能后，attributecreator可用的先前和后续功能的窗口以产生以下内容：

此声明将计算前面前面的两个功能的平均纬度：

Calculations referencing adjacent features can be created in the Arithmetic Editor and the Text Editor. These editors will list the attributes of the currently processed feature first, then the prior features, then the subsequent features.

This transformer accepts any feature.

Features with the new attributes and optionally defined values.

第一次打开attributecreator时，此区域将包含一个空的行，其中可以创建一个新属性。添加附加行作为参赛作品。

扩展高级部分提供对可用于定义值的相邻功能的属性的访问。虽然此部分可能会出现复杂，但大多数用户很少需要此功能。

检查“启用相邻的功能属性”以使用此功能。

You can now set an attribute value (in the Attribute Actions matrix) based on the attributes of features prior or subsequent to the current feature by referencing them as follows:

• 先前功能的属性称为特征[-1] .attrname，功能[-2] .attrname等。
• Attributes of subsequent features are referenced as feature[+1].AttrName, feature[+2].AttrName, etc.
• 当前处理的功能的属性直接访问，没有前缀，例如attrname。

检索先前功能的值时，attributecreator对该功能的任何更改都将生效。

现有功能数量

此参数指定attributecreator可以引用的最大现有功能数。如果启用了多个功能属性支持，则这必须是0到100的值。由于必须为处理的每个要素读取其他功能，仅定义要检索所需的最大功能数将提高性能。

Number of Subsequent Features

这个爸爸rameter specifies the maximum number of subsequent features that can be referenced by the AttributeCreator. If Multiple Feature Attribute Support is enabled, this must be a value from 0 to 100. As additional features must be read for each feature processed, defining only the maximum number of features needed to be retrieved will improve performance.

Substitute Missing, Null, and Empty by

此参数指定当引用的属性不存在时的所需行为，具有空值，或具有空字符串值。

Such attributes can be thought of as unresolved attributes. For example, since there are no features prior to the first input feature, the AttributeCreator will fail to resolve the value of feature[-1].AttrName for the first input feature. If this parameter is set toNo Substitution，attributecreator将使用空字符串解析所有未解决的属性。

作为另一个例子，如果特征[+2]的值是空字符串和默认值指定，那么空字符串将被视为未解析的属性，并且将被解析为默认值下指定的值。

If this parameter is set toClosest Adjacent Feature，如果存在这样的功能，则未解决的属性将被解析为最近特征的相应属性。查找最近的功能时，跳过具有未解决属性的功能。如果先前或后续功能具有未解决的属性，则可能使用当前功能来解决缺失属性。

For example, if the value of feature[-2].AttrName is unresolved, then to resolve the value of feature[-2].AttrName the AttributeCreator will look at the closest features to feature[-2], alternating between features prior to and subsequent to feature[-2]. It will first look at feature[-3].AttrName, followed by feature[-1].AttrName if needed, and then feature[-4].AttrName if needed, until all prior and subsequent features specified have been exhausted.

如果属性在spe仍未得到解决cified prior and subsequent features, then it will be resolved as the value specified in the Default Value parameter.

默认值

此参数指定用于在这些情况下解析未解析属性的值：

• 替换丢失，null和空的：设置为默认值
• 替换丢失，null和空的：设置为Closest Adjacent Featureand a value is not found in within the number of prior and subsequent features specified.

使用文本编辑器

文本编辑器提供了一种方便的方法来构建来自各种数据源的文本字符串（包括正则表达式），例如属性，参数和常量，其中结果直接在参数内使用。

Text Editor

使用算术编辑器

The Arithmetic Editor provides a convenient way to construct math expressions from various data sources, such as attributes, parameters, and feature functions, where the result is used directly inside a parameter.

算术编辑器

条件值

根据通过或失败的一个或多个测试条件设置值。

参数条件定义对话框

Content

Expressions and strings can include a number of functions, characters, parameters, and more - whether entered directly in a parameter or constructed using one of the editors.

内容类型

字符串函数	这些功能操纵和格式化字符串。
特殊的角色	A set of control characters is available in the Text Editor.
Math Functions	Math functions are available in both editors.
Math Operators	These operators are available in the Arithmetic Editor.
FME功能功能	这些主要是特定于特征的值。
FME参数	可以使用FME和工作区的参数。
使用用户参数	Create your own editable parameters.

attributecier.

attributekeeper.

attributemanager.

attributeremover

attributerenamer.

AttributeValueMapper

BulkAttributeRenamer

bulkattributeremover