Sets an attribute value by following a reference from one attribute to another, where the first attribute contains the name of the desired (second) attribute. The referenced value is retrieved and assigned to a new attribute.

Jump to Configuration

Typical Uses

  • Carry out a join where there is no join key, but one attribute is a pointer to the required value

How does it work?

The AttributeDereferencer receives the name of an attribute in the Source Attribute parameter. The Source Attribute’s value references (is the name of) another attribute, and the value of this secondary attribute will be added to a newly created Destination Attribute.



Input Ports

Output Ports


Editing Transformer Parameters

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.

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. 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.

Dialog Options - Tables

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


Processing Behavior


Feature Holding


Dependencies None
FME Licensing Level FME Base Edition and above

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