• “A digital twin is a representation of real-world entities and their processes, synchronized with a certain frequency and fidelity” (Digital Twin Consortium)
• “A digital twin (DT) – also referred to as digital shadow, digital replica, or digital mirror – is a digital representation of a physical asset. Linked to each other, the physical and digital twin regularly exchange data through the PBOD (Performance-Based-Optimum-Design) lifecycle and use phase. Technologies such as artificial intelligence, machine learning, sensors and the Internet of Things (IoT) allow data collection and exchange to take place at the right time. ” (Building Smart International)
• “A digital twin is a virtual representation of an object or system that spans its life cycle, is updated through the use of real-time data, and uses simulations, machine learning, and reasonable aid to help make decisions” (IBM)
• “A digital twin combines data that describes the physical in digital form. Within the construction sector, a digital twin is a realistic representation of assets, their processes and systems” (Digital Built Britain)
  

• Digital Twin Consortium https://www.digitaltwinconsortium.org/
• Digital Twin (DT) Hub https://digitaltwinhub.co.uk/
  

• IBM Digital Twin Exchange https://www.ibm.com/products/digital-twin-exchange

• Centre for Digital Built Britain (CDBB), University of Cambridge https://www.cdbb.cam.ac.uk/
• Digital Twin (DT) Hub https://digitaltwinhub.co.uk/
• Online learning https://digitaltwinhub.co.uk/online-learning/
  

• Digital Engineering and Digital Twin (DEDT) https://www.techscience.com/journal/dedt
  
• Digital Twin https://digitaltwin1.org/
  

• 4 Main Types of Digital Twins and Their Characteristics https://program-ace.com/blog/types-of-digital-twins/
  
• AIoT Playbook (Digital Playbook) https://www.digitalplaybook.org/
  
• Approach to the digital twin for the AECO sector, beyond BIM https://bim6d.eu/2021/07/08/publication-in-building-smart-digital-twin-beyond-bim/
• BIM Level 4 of Maturity in AECO is Metaverse https://bim6d.eu/2022/10/16/level-4-metaverse/
  
• Digital twin - wikipedia https://en.wikipedia.org/wiki/Digital_twin
• Digital Twin Consortium https://www.digitaltwinconsortium.org/
• Technology Showcase https://www.digitaltwinconsortium.org/initiatives/technology-showcase/
  
• Digital twin live demo https://digitaltwin.powerbim.io/
  
• Digital twin technology https://www.forbes.com/sites/bernardmarr/2017/03/06/what-is-digital-twin-technology-and-why-is-it-so-important/
  
• The 3 Levels of the Digital Twin Technology – 2023 https://vidyatec.com/blog/the-3-levels-of-the-digital-twin-technology-2/
• What is a digital twin? https://www.ibm.com/topics/what-is-a-digital-twin
  
• What Is a Digital Twin? How Intelligent Data Models Can Shape the Built World (4:25) https://www.autodesk.com/design-make/articles/what-is-a-digital-twin

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• Digital Twin Consortium https://www.youtube.com/channel/UCECCbfINzZnupxJ4NPeD1hQ
  
• Digital Twin in Construction (7:17) https://youtu.be/e1wfpD0OYxA
  
• Digital Twin in construction - Part 2 (6:27) https://youtu.be/qmJR7pDofVA
  
• Introduction to Digital Twin: Simple, but detailed (7:18) https://youtu.be/RaOejcczPas
  
• The National Digital Twin and the Gemini Principles (2:20) https://youtu.be/GoIv5ritEiM
  
• What is Digital Twin? (4:24) https://youtu.be/60eCpw0Toy4
  
• What is Digital Twin? How does it work? (1:56) https://youtu.be/iVS-AuSjpOQ
  
• What is the National Digital Twin (NDT)? (2:50) https://youtu.be/ChCNcLY6tKA
• What Is a Digital Twin? How Intelligent Data Models Can Shape the Built World (4:25) https://www.autodesk.com/design-make/articles/what-is-a-digital-twin

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