Creates a feature whose attributes contain the definition of an IFC quantity set. The features output from this transformer are similar to the QuantitySetDefinition features produced by the IFC reader. These features define the names and types of quantities in a quantity set. The features output from this transformer are intended to be routed to the QuantitySetDefinition feature type of an IFC writer.

When writing an IfcQuantitySet or IfcElementQuantity object, the IFC writer will look for a quantity set definition whose name matches the name of the quantity set object. If a match is found, the writer will write out the quantities listed in the definition, taking the values from the quantity set object itself. In this way, quantity set definitions provide the schema for quantity set objects.

This is done because FME feature attributes are not able to define their data types in the detail that IFC quantity sets require. It also allows many quantity set objects to share the same definition, rather than having the definition information duplicated on each quantity set object.



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.

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