Overview
EN ISO 29481-2:2025 - Building information models: Information delivery manual - Part 2: Interaction framework (ISO 29481-2:2025) defines a standardized methodology and digital format for describing, managing and executing interactions between actors across all life‑cycle stages of an asset. It specifies an interaction framework that maps roles, transactions and messages, provides an execution format (XML/express schemas and examples), and promotes secure, verifiable and traceable digital IDM (Information Delivery Manual) communication to support interoperability between software applications.
Key Topics and Technical Requirements
- Interaction framework methodology: structured approach to model interactions for any use case, including hierarchical elements such as roles → transactions → messages and simple/complex elements.
- Mapping responsibilities and interactions: clear process context for information flow so each actor’s obligations are explicit.
- Message and schema formats: machine‑readable formats (XML examples and EXPRESS-based schema elements) for defining project‑specific messages and validating interactions.
- Validation and execution: rules and schemas for validating interaction frameworks and messages; examples and templates to support implementation.
- Security and traceability: support for signed messages (advanced electronic signatures), verifiable and auditable communication, archiving and change handling during project execution.
- Interoperability enablers: definitions aimed at facilitating data‑ and process‑driven exchange between BIM systems, Common Data Environments (CDEs) and other IT solutions.
Practical Applications
- Standardizes digital communication workflows for design, construction, handover and asset management.
- Automates coordination tasks by enabling software to interpret roles, transactions and required message content.
- Ensures traceable, auditable exchanges-useful for compliance, claims avoidance and quality assurance.
- Supports system integration between BIM tools, CDE platforms and asset management systems to reduce manual transfer and misinterpretation of data.
- Provides templates and example XML to accelerate implementation in IT systems and API development.
Who Should Use It
- BIM managers, information managers and project information leads
- Software vendors, CDE and systems integrators implementing IDM workflows
- Asset owners, facility managers and contractors seeking reliable lifecycle data exchange
- Standards practitioners and auditors focused on digital traceability, security and interoperability
Related Standards
EN ISO 29481-2:2025 is a practical, implementation‑oriented standard to make BIM communication predictable, secure and interoperable across the full asset lifecycle.
