GeometryPropertyExtractor

Features with geometries.

Features with newly set attributes based on geometry name or traits.

Features that were not modified by the transformer.

Use this parameter if you want to isolate only a portion of the geometry passed in to the transformer. If no criteria are specified, the action will apply to the entire geometry at all levels.

Selection can be based on structural location, geometry name, type, appearance information, traits, trait storage types, or definition reference. The syntax used is a restricted set of XQuery, where the return clause is fixed.

The basic Geometry XQuery dialog allows you to construct simple selection queries by automatically writing the necessary query based on specified test clauses. Clicking the Switch to Advanced button opens the Advanced Editor, which allows you to type a query free-form, for more expressive queries.

Note: Once you switch to Advanced mode, you will have to clear all parameters before you can return to Basic mode.

A hierarchical geometry is represented as nodes of type geometry, with attributes containing information about traits, type, and name for each geometry.

• Traits: Extract the selected traits to attributes of the same name.
• Geometry Name: Extract the geometry name to the specified attribute

This parameter is valid when the Property to Extract is set to Geometry Name.

It defines the name of the attribute to which the geometry name will be extracted. If a hierarchical geometry is present, multiple geometry names will be extracted onto a list attribute of the same name. The default value for the Geometry Name Attribute is _geometry_name.

Setting this parameter to Yes will prefix the extracted traits with the respective geometry’s name. If traits with the same name exist on multiple geometries, using this option will allow these traits to exist independently.

The names of traits to extract from the geometry. If the Extract Traits as List checkbox is active, then the traits will be pushed up as a list attribute of the same name (even if just one trait present). If the Extract Traits as List checkbox is not active, then the trait will be set as an attribute, and if the trait is present on multiple parts of the geometry, one of the values will arbitrarily be the value associated with the new attribute. If no traits are specified, all traits on selected geometries will be pushed up as attributes (creating a list if the trait is present on multiple parts of the geometry and not otherwise).

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.

Note: Not all tools are available in all transformers.