AttributeRenamer

Renames one or more attributes, retaining the attribute’s current values.

Typical Uses

Change the name of an existing attribute

How does it work?

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.

Examples

Usage Notes

Consider using the AttributeManager instead.
To rename groups of attributes using prefixes, suffixes, and patterns, consider using the BulkAttributeRenamer
The AttributeRenamer can be used for simple renaming of list attributes.

Configuration

Input Ports

Output Ports

Parameters

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	Enabled when If Input Attribute is Missing is set to Set Default Value. 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.
If Input Attribute is Missing	Select an action to take if a specified input attribute has no value: - Remove Output Attribute - Preserve Existing Output Attribute - Set Default Value - enables the Default Value column
Keep Renamed Attributes Only	If enabled, all exposed attributes other than those included in the Attributes to Rename table will be discarded.

Renaming Lists

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

Editing Transformer Parameters

Transformer parameters can be set by directly entering values, using expressions, or referencing other elements in the workspace such as attribute values or user parameters. Various editors and context menus are available to assist. To see what is available, click beside the applicable parameter.

How to Set Parameter Values

Defining Values

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.

Using the Text Editor

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.

Text Editor

Using the Arithmetic Editor

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.

Arithmetic Editor

Conditional Values

Set values depending on one or more test conditions that either pass or fail.

Parameter Condition Definition Dialog

Content

Expressions and strings can include a number of functions, characters, parameters, and more.

When setting values - whether entered directly in a parameter or constructed using one of the editors - strings and expressions containing String, Math, Date/Time or FME Feature Functions will have those functions evaluated. Therefore, the names of these functions (in the form @<function_name>) should not be used as literal string values.

Content Types

String Functions	These functions manipulate and format strings.
Special Characters	A set of control characters is available in the Text Editor.
Math Functions	Math functions are available in both editors.
Date/Time Functions	Date and time functions are available in the Text Editor.
Math Operators	These operators are available in the Arithmetic Editor.
FME Feature Functions	These return primarily feature-specific values.
FME Parameters	FME and workspace-specific parameters may be used.
Creating and Modifying User Parameters	Create your own editable parameters.

Dialog Options - Tables

Table Tools

Transformers with table-style parameters have additional tools for populating and manipulating values.

Row Reordering

Enabled once you have clicked on a row item. Choices include:

Add a row
Remove a row
Move current row up one
Move current row down one
Move current row to top
Move current row to bottom

Cut, Copy, and Paste

Enabled once you have clicked on a row item. Choices include:

Cut a row - delete and copy to clipboard
Copy a row to the clipboard
Paste a row from the clipboard

Cut, copy, and paste may be used within a transformer, or between transformers.

Filter

Start typing a string, and the matrix will only display rows matching those characters. Searches all columns. This only affects the display of attributes within the transformer - it does not alter which attributes are output.

Import

Import populates the table with a set of new attributes read from a dataset. Specific application varies between transformers.

Reset/Refresh

Generally resets the table to its initial state, and may provide additional options to remove invalid entries. Behavior varies between transformers.

Note: Not all tools are available in all transformers.

For more information, see Transformer Parameter Menu Options.

Reference

Processing Behavior	Feature-Based
Feature Holding	No
Dependencies	None
Aliases
History

FME Community

The FME Community is the place for demos, how-tos, articles, FAQs, and more. Get answers to your questions, learn from other users, and suggest, vote, and comment on new features.

Search for all results about the AttributeRenamer on the FME Community.

Examples may contain information licensed under the Open Government Licence – Vancouver, Open Government Licence - British Columbia, and/or Open Government Licence – Canada.