An overview of ModelBuilder tools

ModelBuilder includes a collection of utility tools that support building flexible and powerful models.

Iterators

Iterators enable batch processing and help repeat a process or set of processes on a set of inputs.

Iterator	Description
For	Iterates over a starting and ending value by a given value. It works exactly like For in any scripting/programming language, executing through a set number of items.
While	Works exactly like 'while' in any scripting/programming language, executing "while" a condition is true or false for the input or set of inputs.
Iterate Feature Selection	Iterates over features in a feature class.
Iterate Row Selection	Iterates over rows in a table.
Iterate Field Values	Iterates over each value in a field.
Iterate Multivalue	Iterates over a list of values.
Iterate Datasets	Iterates over datasets in a Workspace or Feature Dataset.
Iterate Feature Classes	Iterates over feature classes in a Workspace or Feature Dataset.
Iterate Files	Iterates over files in a folder.
Iterate Rasters	Iterates over rasters in a Workspace or a Raster Catalog.
Iterate Tables	Iterates over tables in a workspace.
Iterate Workspaces	Iterates over workspaces in a folder.

Utilities

ModelBuilder utilities include diverse operations all focused on extending the capabilities of a model.

Utility	Description
Calculate Value	Returns a value based on a specified Python expression.
Collect Values	Collects output values of an iterator, or converts a list of multivalues into a single input. The output of Collect Values can be used as input to tools such as Merge, Append, Mosaic, and Cell Statistics.
Get Field Value	Gets the value of the first row of a table for the specified field.
Parse Path	Parses the input into its file, path, name, or extension. The output can be used as inline variables in the output name of other tools.
Select Data	Selects a child data element in a parent data container such as a folder, geodatabase, feature dataset, or coverage.

Logical

Logical tools are a category of ModelBuilder utilities that help you control the flow of processes in a model and enable if-then-else branching logic.

Utility	Description
If Data Exists	Evaluates if the specified data exists.
If Field Exists	Evaluates if the input data has the specified fields.
If Selection Exists	Evaluates if the input data has a selection and if a certain number of records are selected.
If Coordinate System Is	Evaluates if the input data has the specified coordinate system.
If Data Type Is	Evaluates if the input data matches the specified data type.
If Feature Type Is	Evaluates if a feature class is of the specified feature type.
If Field Value Is	Evaluates if the values in an attribute field match a specified value, expression, or second field.
If Row Count Is	Evaluates if the row count of the input data matches a specified value.
If Spatial Relationship Is	Evaluates whether the inputs have a specified spatial relationship.
If Value Is	Evaluates an input value against a single value, a list of values, or a range of values using a defined comparison operator.
Merge Branch	The Merge Branch tool merges two or more logical branches into a single output.
Stop	For the set of input values, iteration will continue if all the inputs are true and stop if any one of the inputs is false. It is functionally similar to the While iterator but is useful to stop a model if there is one While iterator in a model and no additional iterators can be added.