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Object-Oriented Modeling
A modeling approach where building information is represented as objects with identity, properties, behavior, and relationships.
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Spatial Hierarchy
The organization of spaces and locations into nested levels such as site, building, floor, zone, and room-like groupings.
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Reference Model
A model linked or used for context, coordination, or comparison without being the active authoring source.
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Linked Model
A separate model file referenced into another model so multiple teams can work independently while coordinating together.
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Host Model
The main model into which other referenced models, objects, or systems are linked for coordination or documentation.
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Discipline Model
A model produced by a specific discipline such as architecture, structure, mechanical, electrical, or civil design.
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Building Element
A discrete physical part of a built asset, such as a wall, slab, door, pipe, beam, or item of equipment.
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Model Granularity
The degree to which model content is broken down into separate objects, systems, assemblies, or data records.
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Building System
A group of related elements that perform a function, such as structure, ventilation, power distribution, or fire protection.
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Model Reliability
The confidence that model geometry and data are accurate enough for a stated use at a stated time.