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Extended Reality (XR) is an umbrella term that refers to all the possible combinations of real and virtual environments: ;

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• Virtual Reality (VR) in which everything is computer generated and the user is fully immersed in a virtual world.
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• Augmented Reality (AR) in which virtual elements are superimposed over reality.
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• Mixed Reality (MR) in which physical and virtual elements coexist and interact in real-time.
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; Over the years, there have been many improvements in the XR technology, leading to new devices and paradigms of interaction, making it a versatile tool that fits in many different application domains such as entertainment, medicine, culture, tourism, etc.
Despite this, developing an XR application is difficult due to the costs of creating a new product from scratch and the need to define, implement, and assess design solutions and guidelines about digital contents, interaction methods, and mechanisms that are easy to learn and simple to use.The research aims to develop ART, a XR framework (focusing on AR and MR) that provides methodological and implementation tools to support the design of interactive experiences and make its development easier and more cost-effective. The platform offers different abstraction levels at which developers can work without being concerned about the underlying structure. Thanks to this, the development process becomes more systematical and modular, allowing the developer to choose to work with either a default structure that needs only a few adjustments to be completed or a more customizable template that requires more configuration.