iTwin.js
Getting Started
Documentation
API
Community Sandboxes
Base Infrastructure Schemas (BIS)
Guide
Introduction
Overview
Federated Digital Twins
Modeling with BIS
Organization of BIS
Fabric of the Universe
Fundamentals
Element Fundamentals
Codes
ElementAspect Fundamentals
Mixins
Model Fundamentals
Relationship Fundamentals
Schemas (“Domains”)
Classifying Elements
Type Definitions
Categories
Data Organization
Information Hierarchy
Modeling Perspectives
Top of the World
Single Responsible-Party Principle
Organizing Models and Elements
Spatial Composition
Modeling Systems
Organizing Definition Elements
Physical Modeling Perspective
3D Guidance
PhysicalModel Hierarchy
Physical Models and Elements
Physical Materials
Quantity Takeoffs: Guidelines
Other Modeling Perspectives
Functional Models and Elements
Analysis Models and Elements
Information Models and Elements
Schema Evolution
Schema Customization
Data Evolution Across Time
Schema Versioning
Schema Production Status
Schema Design Guidelines
BIS Naming Guidelines
Rules and Recommendations
Special Terms
Summary of Exceptions
Abbreviations and Acronyms
Relationship “Strengths”
Other topics
BIS Schema Units
BIS Schema KindOfQuantities
BIS Schema Validation
References
BIS Glossary
Class-diagram Conventions
Instance-diagram Conventions
Domain Schemas
Overview
Core domains
Common domains
Discipline-Physical domains
Discipline-Other domains
Engineering Content (EC)
Overview
ECSchema
ECClass
ECEntityClass
ECMixinClass
ECStructClass
ECCustomAttributeClass
ECRelationshipClass
ECProperty
ECCustomAttributes
ECEnumeration
KindOfQuantity
PropertyCategory
PrimitiveTypes
CustomAttribute Container Types
Unit
Constant
Phenomenon
UnitSystem
Format
ECName
Changes Between ECObjects 2 and 3
Base Infrastructure Schema
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Last Updated:
21 November, 2022
