Blank rows are provided where you can select attributes to rename and enter the new names.. One or more pairs can be added, and all features that pass through the transformer are modified according to these selections. The values of the attributes are not changed, and you can optionally provide default values to be applied to the output where input values are missing.
Example: Renaming an attribute
In this example, several attributes are renamed at once. “GlobalID” undergoes a case change to become “GLOBALID”, and three more attributes are renamed.
The changes are reflected in the transformer - note that the renamed attributes appear by default at the top of the list.
Input
Features with attributes.
Output
Features with the renamed attributes and original values. Renamed attributes will appear at the top of the list.
Attributes To Rename
When an AttributeRenamer is opened for the first time, this area will contain a blank row where you can select or enter an attribute to be renamed. Additional rows are added as entries are made.
|
Input Attribute |
Enter or select the name of an existing attribute from one of the drop-downs. |
|
Output Attribute |
Enter a new name for the attribute. |
|
Default Value |
Optional: The value to set the Output Attribute to if the Input Attribute does not exist on the feature (a default value). If the Default Value is blank, and the Input Attribute does not exist on the feature, the Output Attribute will not be created. See Defining Values for various methods of setting these. |
The AttributeRenamer can be used to rename list attributes. The number of parts in the Input Attribute and Output Attribute must be the same, as shown here:
|
Input Attribute |
Output Attribute |
OK? |
|---|---|---|
|
inlist{} |
outlist{} |
Yes |
|
inlist{}.three{}.parts |
outlist{}.samenum{}.parts |
Yes |
|
inlist{}.three{}.parts |
outlist{}.two |
No - Output has fewer parts. |
To rename a single element in a list, add the number -
|
Input Attribute |
Output Attribute |
|---|---|
|
_trees{0}.Species |
FirstSpecies |
Additional Tools
|
Row Reordering
|
Choices include:
|
|
Filter
|
Start typing a string, and the list will only display attribute names matching those characters. This only affects the display of attributes within the transformer - it does not alter which attributes are output. |
|
Import
|
The import button will populate the transformer with a set of new attributes read from a dataset. In the AttributeRenamer, you can import Input and Output Attribute names from an external dataset. If the transformer already contains renaming pairs, these are appended to the existing list. |
Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click 
beside the applicable parameter. For more information, see Transformer Parameter Menu Options.
There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters. There are a number of tools and shortcuts that can assist in constructing values, generally available from the drop-down context menu adjacent to the value field.
How to Set Parameter Values
The Text Editor provides a convenient way to construct text strings (including regular expressions) from various data sources, such as attributes, parameters, and constants, where the result is used directly inside a parameter.
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.
Set values depending on one or more test conditions that either pass or fail.
Parameter Condition Definition Dialog
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.
Content Types
| These functions manipulate and format strings. | |
| A set of control characters is available in the Text Editor. | |
| Math functions are available in both editors. | |
| These operators are available in the Arithmetic Editor. | |
| These return primarily feature-specific values. | |
| FME and workspace-specific parameters may be used. | |
| Working with User Parameters | Create your own editable parameters. |
|
Processing Behavior |
|
|
Feature Holding |
No |
| Dependencies | None |
| FME Licensing Level | FME Base Edition and above |
| Aliases | |
| History | |
| Categories |
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Examples may contain information licensed under the Open Government Licence – Vancouver
