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Create query to select architectural elements with stereotype based on specified sub-constraint



query = HasStereotype(sub-constraint) creates a query query that the find and createView functions use to select architectural elements with a stereotype that satisfies the given sub-constraint sub-constraint.


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Import the package that contains all of the System Composer™ queries.

import systemcomposer.query.*

Open the Simulink® project file for the keyless entry system.


Load the architecture model.

model = systemcomposer.loadModel("KeylessEntryArchitecture");

Create a query for all the hardware components and run the query, displaying one of them.

constraint = HasStereotype(IsStereotypeDerivedFrom("AutoProfile.HardwareComponent"));
hwComp = find(model,constraint,Recurse=true,IncludeReferenceModels=true);
comp = hwComp(16)
comp = 1x1 cell array
    {'KeylessEntryArchitecture/Door Lock//Unlock System/Rear Pass Door Lock Sensor/Door Lock Sensor'}

Input Arguments

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Condition restricting the query, specified as a systemcomposer.query.Constraint object.

Output Arguments

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Query, returned as a systemcomposer.query.Constraint object.

More About

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TermDefinitionApplicationMore Information

A view shows a customizable subset of elements in a model. Views can be filtered based on stereotypes or names of components, ports, and interfaces, along with the name, type, or units of an interface element. Create views by adding elements manually. Views create a simplified way to work with complex architectures by focusing on certain parts of the architectural design.

You can use different types of views to represent the system:

  • Operational views demonstrate how a system will be used and should be integrated with requirements analysis.

  • Functional views focus on what the system must do to operate.

  • Physical views show how the system is constructed and configured.

A viewpoint represents a stakeholder perspective that specifies the contents of the view.

Modeling System Architecture of Keyless Entry System
element group

An element group is a grouping of components in a view.

Use element groups to programmatically populate a view.


A query is a specification that describes certain constraints or criteria to be satisfied by model elements.

Use queries to search elements with constraint criteria and to filter views.

Find Elements in Model Using Queries
component diagram

A component diagram represents a view with components, ports, and connectors based on how the model is structured.

Component diagrams allow you to programmatically or manually add and remove components from the view.

Inspect Components in Custom Architecture Views
hierarchy diagram

You can visualize a hierarchy diagram as a view with components, ports, reference types, component stereotypes, and stereotype properties.

There are two types of hierarchy diagrams:

  • Component hierarchy diagrams display components in tree form with parents above children. In a component hierarchy view, each referenced model is represented as many times as it is used.

  • Architecture hierarchy diagrams display unique component architecture types and their relationships using composition connections. In an architecture hierarchy view, each referenced model is represented only once.

Display Component Hierarchy and Architecture Hierarchy Using Views

Version History

Introduced in R2019b