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Building / Structure

vr.wm-blt-001 · wm-blt-001-building-structure

Represent a persistent building or engineered structure as a governed physical artifact with identity, geometry, composition, fabric, materials, systems, capabilities, condition, performance and lifecycle evidence independent of any storage or exchange format.

World Models Physical world and living systems PHY.BLT.BLD
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources

Bundle → Layer → Finding → Questions Filled

7 bundles · 16 layers · 32 findings · 96 questions

Identity, classification and boundary Establishes the persistent physical artifact and its class boundary.

Artifact identity

Authoritative identity, aliases and continuity.

Authoritative identity, namespace and version

Master-system identifier, namespace, immutable revision and record authority for the physical artifact.

  1. What is the current governed value of authoritative identity, namespace and version for this building or structure, and which subtype or scope does it apply to? identity
  2. Which observation, source, method and authority establish authoritative identity, namespace and version, at what time, accuracy and confidence? temporal
  3. Which validation, access or change rule may revise authoritative identity, namespace and version while preserving the prior physical-state history? validation

Aliases, complex parts, merge and split

External IDs and identity continuity when a complex is decomposed, connected buildings are grouped or records are corrected.

  1. What is the current governed value of aliases, complex parts, merge and split for this building or structure, and which subtype or scope does it apply to? relationship
  2. Which observation, source, method and authority establish aliases, complex parts, merge and split, at what time, accuracy and confidence? requirement
  3. Which validation, access or change rule may revise aliases, complex parts, merge and split while preserving the prior physical-state history? composition

Classification and recognition

Class, intended function and distinguishing features.

Building or structure class and intended function

Versioned taxonomy and purpose that distinguish roofed buildings from bridges, towers, dams, tunnels and other engineered works.

  1. What is the current governed value of building or structure class and intended function for this building or structure, and which subtype or scope does it apply to? classification
  2. Which observation, source, method and authority establish building or structure class and intended function, at what time, accuracy and confidence? evidence
  3. Which validation, access or change rule may revise building or structure class and intended function while preserving the prior physical-state history? process

Recognition features, neighboring classes and confidence

Observed visual, geometric, material or functional features and the evidence that distinguishes the artifact from temporary works, equipment, sites and facilities.

  1. What is the current governed value of recognition features, neighboring classes and confidence for this building or structure, and which subtype or scope does it apply to? evidence
  2. Which observation, source, method and authority establish recognition features, neighboring classes and confidence, at what time, accuracy and confidence? retention
  3. Which validation, access or change rule may revise recognition features, neighboring classes and confidence while preserving the prior physical-state history? interoperability
Geometry, location and spatial composition Represents current and historical shape, pose and hierarchical subdivisions.

Georeference and placement

Location, coordinate reference and pose.

Site, parcel, address and geographic references

Typed external location references with jurisdiction and master authority, without importing tenure or address lifecycle.

  1. What is the current governed value of site, parcel, address and geographic references for this building or structure, and which subtype or scope does it apply to? spatial
  2. Which observation, source, method and authority establish site, parcel, address and geographic references, at what time, accuracy and confidence? definition
  3. Which validation, access or change rule may revise site, parcel, address and geographic references while preserving the prior physical-state history? provenance

Coordinate reference, origin, orientation and pose

Coordinate reference system, local datum, placement transform, elevation reference, orientation, accuracy and observation time.

  1. What is the current governed value of coordinate reference, origin, orientation and pose for this building or structure, and which subtype or scope does it apply to? spatial
  2. Which observation, source, method and authority establish coordinate reference, origin, orientation and pose, at what time, accuracy and confidence? state
  3. Which validation, access or change rule may revise coordinate reference, origin, orientation and pose while preserving the prior physical-state history? security

Shape, extent and representation

Footprint, volume, dimensions and alternate geometries.

Footprint, height, area, volume and extents

Measured or derived quantities with unit, boundary convention, tolerance, method and validity time.

  1. What is the current governed value of footprint, height, area, volume and extents for this building or structure, and which subtype or scope does it apply to? measurement
  2. Which observation, source, method and authority establish footprint, height, area, volume and extents, at what time, accuracy and confidence? ownership
  3. Which validation, access or change rule may revise footprint, height, area, volume and extents while preserving the prior physical-state history? relationship

Designed, as-built, surveyed, current and level of detail

Distinct representations with purpose, level of detail, accuracy, source, capture time and transformation lineage.

  1. What is the current governed value of designed, as-built, surveyed, current and level of detail for this building or structure, and which subtype or scope does it apply to? provenance
  2. Which observation, source, method and authority establish designed, as-built, surveyed, current and level of detail, at what time, accuracy and confidence? event
  3. Which validation, access or change rule may revise designed, as-built, surveyed, current and level of detail while preserving the prior physical-state history? measurement

Spatial decomposition

Complex, building parts, storeys, spaces or segments and zones.

Complex, building part, storey and segment

Hierarchical decomposition with role, composition type, parent, order and effective interval.

  1. What is the current governed value of complex, building part, storey and segment for this building or structure, and which subtype or scope does it apply to? composition
  2. Which observation, source, method and authority establish complex, building part, storey and segment, at what time, accuracy and confidence? security
  3. Which validation, access or change rule may revise complex, building part, storey and segment while preserving the prior physical-state history? decision

Premises, space, zone and containment boundary

References to interior units and functional zones plus the boundary or rule by which elements are contained.

  1. What is the current governed value of premises, space, zone and containment boundary for this building or structure, and which subtype or scope does it apply to? composition
  2. Which observation, source, method and authority establish premises, space, zone and containment boundary, at what time, accuracy and confidence? interoperability
  3. Which validation, access or change rule may revise premises, space, zone and containment boundary while preserving the prior physical-state history? ownership
Fabric, structure, envelope and materials Describes what the physical artifact is made of and how loads and separation are achieved.

Structural system and load path

Foundation, frame, stability and supported actions.

Foundation, frame, bearing system and connections

System topology and member-role references for foundations, frames, walls, slabs, shells, cables and connections.

  1. What is the current governed value of foundation, frame, bearing system and connections for this building or structure, and which subtype or scope does it apply to? composition
  2. Which observation, source, method and authority establish foundation, frame, bearing system and connections, at what time, accuracy and confidence? relationship
  3. Which validation, access or change rule may revise foundation, frame, bearing system and connections while preserving the prior physical-state history? privacy

Load path, actions, capacity and design basis

Declared design actions, combinations, load transfer, resistance, serviceability and code or engineering basis without asserting current safety.

  1. What is the current governed value of load path, actions, capacity and design basis for this building or structure, and which subtype or scope does it apply to? constraint
  2. Which observation, source, method and authority establish load path, actions, capacity and design basis, at what time, accuracy and confidence? spatial
  3. Which validation, access or change rule may revise load path, actions, capacity and design basis while preserving the prior physical-state history? state

Envelope and openings

Exterior separation, thermal boundary and controlled openings.

Roof, facade, ground boundary and continuity

Envelope surfaces, layers, junctions, continuity and exterior or interior side semantics.

  1. What is the current governed value of roof, facade, ground boundary and continuity for this building or structure, and which subtype or scope does it apply to? composition
  2. Which observation, source, method and authority establish roof, facade, ground boundary and continuity, at what time, accuracy and confidence? constraint
  3. Which validation, access or change rule may revise roof, facade, ground boundary and continuity while preserving the prior physical-state history? measurement

Door, window, opening, penetration and interface

Typed openings and interfaces with dimensions, operation, adjacency, sealing and external component references.

  1. What is the current governed value of door, window, opening, penetration and interface for this building or structure, and which subtype or scope does it apply to? relationship
  2. Which observation, source, method and authority establish door, window, opening, penetration and interface, at what time, accuracy and confidence? quality
  3. Which validation, access or change rule may revise door, window, opening, penetration and interface while preserving the prior physical-state history? definition

Materials and physical properties

Substances, assemblies and measured intrinsic properties.

Material layer, profile, constituent and source

Material identity or classification, assembly order, thickness, proportion, manufacturer or source reference and confidence.

  1. What is the current governed value of material layer, profile, constituent and source for this building or structure, and which subtype or scope does it apply to? composition
  2. Which observation, source, method and authority establish material layer, profile, constituent and source, at what time, accuracy and confidence? access
  3. Which validation, access or change rule may revise material layer, profile, constituent and source while preserving the prior physical-state history? authority

Density, mass, hardness, strength, fragility and surface

Relevant measured properties with units, tolerance, anisotropy, moisture, temperature, method, sample and validity conditions.

  1. What is the current governed value of density, mass, hardness, strength, fragility and surface for this building or structure, and which subtype or scope does it apply to? measurement
  2. Which observation, source, method and authority establish density, mass, hardness, strength, fragility and surface, at what time, accuracy and confidence? identity
  3. Which validation, access or change rule may revise density, mass, hardness, strength, fragility and surface while preserving the prior physical-state history? retention
Systems, capabilities, affordances and safety Connects installed systems to supported uses, actions, constraints and hazards.

Installed systems and services

Technical, distribution, transport, fire and control systems.

System identity, function, scope and topology

References to systems and components with served areas, ports, networks, function and operational boundary.

  1. What is the current governed value of system identity, function, scope and topology for this building or structure, and which subtype or scope does it apply to? relationship
  2. Which observation, source, method and authority establish system identity, function, scope and topology, at what time, accuracy and confidence? lifecycle
  3. Which validation, access or change rule may revise system identity, function, scope and topology while preserving the prior physical-state history? temporal

Capacity, availability, control and dependency

Rated and observed capacity, service state, control authority, utilities, upstream dependencies and failure propagation.

  1. What is the current governed value of capacity, availability, control and dependency for this building or structure, and which subtype or scope does it apply to? state
  2. Which observation, source, method and authority establish capacity, availability, control and dependency, at what time, accuracy and confidence? authority
  3. Which validation, access or change rule may revise capacity, availability, control and dependency while preserving the prior physical-state history? evidence

Use, affordance and hazard

Supported occupancy or function, actions, access and failure modes.

Supported use, occupancy, load, access and egress

Permitted or designed uses, occupancy and load limits, accessibility, circulation, entry, exit and evacuation affordances.

  1. What is the current governed value of supported use, occupancy, load, access and egress for this building or structure, and which subtype or scope does it apply to? process
  2. Which observation, source, method and authority establish supported use, occupancy, load, access and egress, at what time, accuracy and confidence? measurement
  3. Which validation, access or change rule may revise supported use, occupancy, load, access and egress while preserving the prior physical-state history? identity

Hazard, vulnerability, protection and failure mode

Exposure, vulnerability, protective feature, foreseeable failure, trigger, consequence and safe operating restriction.

  1. What is the current governed value of hazard, vulnerability, protection and failure mode for this building or structure, and which subtype or scope does it apply to? security
  2. Which observation, source, method and authority establish hazard, vulnerability, protection and failure mode, at what time, accuracy and confidence? privacy
  3. Which validation, access or change rule may revise hazard, vulnerability, protection and failure mode while preserving the prior physical-state history? requirement
Condition and performance Records dated observations and assessments of current fabric and behavior.

Inspection, condition and damage

Observation scope, defects, damage and restrictions.

Inspection method, scope, access and limitations

Inspector, competence, method, covered and inaccessible parts, instruments, conditions, time, evidence and limitations.

  1. What is the current governed value of inspection method, scope, access and limitations for this building or structure, and which subtype or scope does it apply to? evidence
  2. Which observation, source, method and authority establish inspection method, scope, access and limitations, at what time, accuracy and confidence? decision
  3. Which validation, access or change rule may revise inspection method, scope, access and limitations while preserving the prior physical-state history? access

Defect, damage, condition grade and restriction

Localized observation, cause hypothesis, extent, severity, confidence, assessment scheme and resulting use restriction.

  1. What is the current governed value of defect, damage, condition grade and restriction for this building or structure, and which subtype or scope does it apply to? quality
  2. Which observation, source, method and authority establish defect, damage, condition grade and restriction, at what time, accuracy and confidence? relationship
  3. Which validation, access or change rule may revise defect, damage, condition grade and restriction while preserving the prior physical-state history? temporal

Functional, environmental and energy performance

Measured or modelled behavior under declared conditions.

Structural, serviceability, function and reliability

Capacity or performance assessment, demand, margin, reliability basis, functional failure and remaining-life estimate.

  1. What is the current governed value of structural, serviceability, function and reliability for this building or structure, and which subtype or scope does it apply to? validation
  2. Which observation, source, method and authority establish structural, serviceability, function and reliability, at what time, accuracy and confidence? provenance
  3. Which validation, access or change rule may revise structural, serviceability, function and reliability while preserving the prior physical-state history? quality

Energy, carbon, indoor environment and resource profile

Metered or calculated energy, emissions, lifecycle warming, indoor environmental quality and resource performance with regional method binding.

  1. What is the current governed value of energy, carbon, indoor environment and resource profile for this building or structure, and which subtype or scope does it apply to? measurement
  2. Which observation, source, method and authority establish energy, carbon, indoor environment and resource profile, at what time, accuracy and confidence? process
  3. Which validation, access or change rule may revise energy, carbon, indoor environment and resource profile while preserving the prior physical-state history? classification
Lifecycle, change and provenance Preserves origin, acceptance, alteration, use change, decommissioning and demolition.

Origin, design, construction and handover

Design intent, as-built evidence and acceptance into service.

Design authority, basis and approved representation

Designer or responsible authority, requirement and code basis, approved model or document references and issue status.

  1. What is the current governed value of design authority, basis and approved representation for this building or structure, and which subtype or scope does it apply to? authority
  2. Which observation, source, method and authority establish design authority, basis and approved representation, at what time, accuracy and confidence? validation
  3. Which validation, access or change rule may revise design authority, basis and approved representation while preserving the prior physical-state history? constraint

Construction completion, commissioning and acceptance

References to works, completion, tests, commissioning, handover package and acceptance event that establish as-built state.

  1. What is the current governed value of construction completion, commissioning and acceptance for this building or structure, and which subtype or scope does it apply to? event
  2. Which observation, source, method and authority establish construction completion, commissioning and acceptance, at what time, accuracy and confidence? exception
  3. Which validation, access or change rule may revise construction completion, commissioning and acceptance while preserving the prior physical-state history? interoperability

Alteration, use change and end of life

Versioned change to fabric, function or physical existence.

Alteration, renovation, repair and change of use

Before and after fabric or function states, work and authorization references, effective time and updated performance assumptions.

  1. What is the current governed value of alteration, renovation, repair and change of use for this building or structure, and which subtype or scope does it apply to? lifecycle
  2. Which observation, source, method and authority establish alteration, renovation, repair and change of use, at what time, accuracy and confidence? classification
  3. Which validation, access or change rule may revise alteration, renovation, repair and change of use while preserving the prior physical-state history? spatial

Decommission, demolition, removal and residual record

Physical cessation, partial retention, material-recovery references, evidence, status and continuing historical or legal references.

  1. What is the current governed value of decommission, demolition, removal and residual record for this building or structure, and which subtype or scope does it apply to? retention
  2. Which observation, source, method and authority establish decommission, demolition, removal and residual record, at what time, accuracy and confidence? temporal
  3. Which validation, access or change rule may revise decommission, demolition, removal and residual record while preserving the prior physical-state history? validation
Governance, access and interoperability Controls authority, disclosure, integrity, retention and exchange.

Ownership, custody, access and retention

External party bindings and minimum authorized views.

Owner, operator, custodian and record authority

Time-bounded external party roles and distinct authority over fabric, operation, data and decisions.

  1. What is the current governed value of owner, operator, custodian and record authority for this building or structure, and which subtype or scope does it apply to? ownership
  2. Which observation, source, method and authority establish owner, operator, custodian and record authority, at what time, accuracy and confidence? requirement
  3. Which validation, access or change rule may revise owner, operator, custodian and record authority while preserving the prior physical-state history? composition

Projection, security, retention and legal hold

Field and artifact disclosure, sensitive geometry controls, permitted purpose, retention, hold and tombstone rules.

  1. What is the current governed value of projection, security, retention and legal hold for this building or structure, and which subtype or scope does it apply to? access
  2. Which observation, source, method and authority establish projection, security, retention and legal hold, at what time, accuracy and confidence? evidence
  3. Which validation, access or change rule may revise projection, security, retention and legal hold while preserving the prior physical-state history? process

Provenance and exchange

Revision lineage, validation and versioned mappings.

Observation, revision, derivation and confidence

Actor, activity, source, method, observation time, derivation, uncertainty, predecessor and correction reason.

  1. What is the current governed value of observation, revision, derivation and confidence for this building or structure, and which subtype or scope does it apply to? provenance
  2. Which observation, source, method and authority establish observation, revision, derivation and confidence, at what time, accuracy and confidence? retention
  3. Which validation, access or change rule may revise observation, revision, derivation and confidence while preserving the prior physical-state history? interoperability

IFC, CityGML, schema crosswalk and loss

Pinned source and target versions, model view or level of detail, field mappings, extension namespace, validation and round-trip loss.

  1. What is the current governed value of ifc, citygml, schema crosswalk and loss for this building or structure, and which subtype or scope does it apply to? interoperability
  2. Which observation, source, method and authority establish ifc, citygml, schema crosswalk and loss, at what time, accuracy and confidence? definition
  3. Which validation, access or change rule may revise ifc, citygml, schema crosswalk and loss while preserving the prior physical-state history? provenance

Classifiers Filled

Family
World Models
Category
Physical world and living systems
Entry kind
aggregate
Navigation path
NAV.PHY.BLT.BLD
Domain
PHY.BLT.BLD
Industry
Cross-industry
Tags
buildingstructurephy.blt.bld
Also called
U1

What it is Filled

Owns built-artifact identity, class, geometry bindings, spatial and fabric decomposition, material and installed-system bindings, measured physical properties, recognition features, affordances, hazards, condition and performance assessments, lifecycle changes and exchange projections while referencing facility, site, space, equipment, works, party, permit, incident and document masters.

In scope

  • Building and engineered-structure identity, classification, recognition, geometry, pose and spatial decomposition
  • Structural system, envelope, materials, physical properties, installed-system bindings, capabilities, affordances and hazards
  • Condition, performance, design and as-built provenance, alteration, end of life, access, retention and interoperability

Out of scope

  • Facility operations, land and site tenure, postal address authority, room occupancy and tenancy, individual equipment and product master lifecycles
  • Construction-project and work-order execution, party identity, permits, incidents, finance, valuation, insurance and document payloads
  • Universal building-code, safety, load, energy, condition or structure-subtype vocabularies

Why it exists Filled

Represent a persistent building or engineered structure as a governed physical artifact with identity, geometry, composition, fabric, materials, systems, capabilities, condition, performance and lifecycle evidence independent of any storage or exchange format.

Distinguishing features Filled

  • The built artifact itself with its fabric and geometry, not the facility that operates it.
  • Decomposes into storeys, elements and installed systems, while rooms as occupied spaces belong to the space model.
  • Separate from the land parcel and site on which it stands.
  • Records measured condition and hazards of the structure, not the works project that built or repairs it.

What robots and AI may and may not do Filled

Must not

  • Certify structural safety or fitness for occupation.
  • Alter structural, fire-protection or egress elements by remote control or instruction.
  • Enter restricted or unsafe zones flagged in the record.
  • Overwrite earlier condition assessments instead of adding new ones.
  • Publish detailed plans of security-sensitive buildings.

Only with a human decision

  • Structural or fire safety assessments and sign-off.
  • Decisions on demolition, closure or evacuation.
  • Changes to heritage-protected fabric.

May

  • Record measured properties and condition observations with method and date.
  • Read geometry and element data to plan safe movement or inspection.
  • Report defects and hazards to the responsible party.
  • Project the record to exchange formats with a declared loss inventory.

Moral aspects Filled

  • Wrong structural or fire data can cost lives in an emergency.
  • Accessibility information decides whether disabled people can enter and leave safely.
  • Detailed building data can enable burglary or attacks if disclosed.
  • Embodied carbon and energy performance affect the environment for decades.

Who is affected

  • Occupants and visitors
  • Neighbours and passers-by
  • Owners, workers and emergency responders

Owners Filled

Steward

Declare the Dimension owner, built-asset registry authority, stewards, coordinate and unit policies and delegated engineering decision roles.

Roles

Dimension owner
Own namespace, mastership, delegation, classification, access, retention and federation rules.
Built-asset owner or custodian
Maintain accountable fabric record and authorize permitted disclosure and change.
Designer or engineering authority
Issue design basis, capacity, safety and alteration assessments within competence and mandate.
Surveyor or inspector
Record geometry and condition evidence with method, scope, accuracy and limitations.
Operator or facility representative
Supply current use, system, restriction and performance context without changing fabric authority.
Records and information steward
Maintain revisions, provenance, crosswalks, access, retention and handover integrity.
Auditor
Review decisions, evidence, changes and access without rewriting physical truth.

Links to other meta-models Filled

references

  • WM-BLT-006 Facility - Binds operational aggregation while the building retains independent physical identity and fabric lifecycle.
  • Site, Land Parcel, Address and Geography models - Locates the physical artifact without importing cadastral, tenure or address mastership.
  • Equipment, Product and Material models - Binds installed components and material classifications while external masters own serial, product and supply lifecycles.
  • Construction Works, Project and Work Order models - Links creation and alteration evidence while execution remains independently governed.
  • Person, Organization, Ownership, Permit and Document models - Binds parties, interests, authorizations and evidence without absorbing their lifecycle.
  • Incident and Hazard models - Links damaging events and external hazards while storing only building-local observations and assessments.

composes

  • WM-BLT-002 Premises / Spatial Unit - Provides the candidate spatial matryoshka for independently governed interior units while preserving their typed identities.

aligned

  • IFC 4.3 and ISO 16739-1:2024 - Supports pinned built-asset exchange mappings without making IFC serialization the logical model identity.
  • CityGML 3.0 - Supports platform-independent city-scale semantics and level-of-detail projections with declared loss.

neighbor

  • Facility WM-BLT-006 - Building or structure owns physical fabric; Facility owns the managed operational aggregation. A facility may contain buildings even though IFC uses a different type hierarchy.
  • Site, land parcel and address - The artifact references location, cadastral and address authorities but does not own land tenure, site management or address normalization.
  • Premises, space and spatial unit WM-BLT-002 - This model owns the outer artifact and decomposition bindings; independently usable or governed interior units retain their own identity and lifecycle.
  • Equipment and installed product - The structure owns serving-system, interface and scope bindings while equipment serial identity, maintenance, warranty and spare-parts lifecycle stay external.
  • Construction works and project - Works create or alter the artifact, but schedules, contracts, resources, cost and execution remain in project and work models; accepted outputs update the physical record.
  • Incident, defect and repair - An incident occurs externally, a defect or damage observation is recorded here, an engineering assessment interprets it, and repair execution remains a referenced work record.

contains

  • WM-BLT-002

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Authoritative built-asset master-system identifier and immutable revision identifier.
  • Governed globally resolvable asset IRI or federation identifier.
  • Adopting-Dimension UUID or ULID when no authoritative external identifier exists.

Direct properties required Filled

  • Gross and net floor area in square metres, measured to a stated standard.
  • Height in metres above a stated datum, to roof or highest point as declared.
  • Footprint geometry in a declared coordinate reference system.
  • Thermal transmittance of envelope elements in W/(m2 K), measured or calculated per method.
  • Indoor air temperature in degrees Celsius and relative humidity in percent, with time and location.
  • Structural deflection or crack width in millimetres, with gauge position and date.

Recognition required Filled

  • A building is recognised by footprint, height, facade features, entrances and an address or identifier plate.
  • It is confused with adjoining buildings sharing walls, with temporary structures and with the facility or site it belongs to.

Capabilities and actions required Filled

  • Register built artifact: Create the authoritative building or structure identity and boundary without inventing unavailable fabric facts.
  • Classify and recognize artifact: Apply a pinned taxonomy and evidence-backed distinguishing features.
  • Attach geometric representation: Bind a designed, as-built, surveyed or current geometry with CRS, accuracy and level of detail.
  • Compose spatial and fabric parts: Add or revise typed complex, part, storey, space, element or material membership.
  • Bind installed system: Reference a serving system, component register and served scope.
  • Record physical property: Append a measured or derived geometry, material or performance quantity.
  • Record condition assessment: Capture inspection scope, defect observations, grade, restrictions and limitations.
  • Assess performance and capability: Evaluate loads, serviceability, energy, environmental quality or supported use under a pinned method.
  • Record alteration or use change: Link before and after physical or functional states to authorized work and acceptance evidence.
  • Decommission or demolish artifact: Record physical cessation while retaining historical identity and residual references.
  • Issue built-asset projection: Produce a minimum authorized geometry, condition, performance or handover view.
  • Map external built-asset schema: Transform a pinned IFC, CityGML or partner representation with validation and loss declaration.

Hazards and failure modes required Filled

  • Collapse or falling facade elements.
  • Fire spread and blocked escape routes.
  • Asbestos, lead paint and other hazardous materials in old fabric.
  • Falls from roofs, openings and stairs.

Standards and interfaces required Filled

  • ISO 19650 information management using BIM.
  • buildingSMART bSDD data dictionary.
  • ISO 12006-2 construction classification framework.
  • Brick Schema for installed building systems.

Context of use required Filled

  • EU energy and carbon concepts are a regional profile under Directive (EU) 2024/1275 and do not create universal metrics or certification duties.
  • NIST condition-assessment material is methodological evidence, not a current universal building-code or legal requirement.

Sources Filled

  1. IFC 4.3.2 Documentation - buildingSMART International
  2. IfcBuilding semantic definition - buildingSMART International
  3. IFC spatial structure - buildingSMART International
  4. IFC material resource - buildingSMART International
  5. OGC CityGML Part 1: Conceptual Model Standard - Open Geospatial Consortium
  6. ISO 16739-1:2024 Industry Foundation Classes - International Organization for Standardization
  7. Directive (EU) 2024/1275 on the energy performance of buildings - European Union
  8. Selected methods for condition assessment of existing buildings - National Institute of Standards and Technology
  9. PROV-O: The PROV Ontology - World Wide Web Consortium
  10. RFC 3339: Date and Time on the Internet: Timestamps - Internet Engineering Task Force

Open questions

  • Validate the base against building, bridge, tunnel, tower, dam, retaining-structure and temporary-works subtype profiles.
  • Develop formal structural, fire, accessibility, energy, indoor-environment and climate-hazard profile recipes with jurisdictional authority.
  • Create certified IFC 4.3 and CityGML 3.0 crosswalks with model views, levels of detail, validation fixtures and declared information loss.
  • Approve sibling model identifiers and relation cardinalities for sites, parcels, spaces, equipment, materials, works, permits, incidents and documents.
  • Building-code, structural-system, bridge, tunnel, tower, dam and regional safety profiles must supply exact classes, loads, limits, tests and legal decisions.
  • Component-level equipment, product, maintenance, work-order, permit, valuation and occupancy semantics remain in neighboring models.
  • Certified IFC and CityGML exchange crosswalks, model-view profiles and round-trip tests remain future work.

Machine files

Card as JSON Specification AGENTS.md Source Card backlog vercy.card/1

Provenance

world-models research · reviewable-draft

Built from: models/wm-blt-001-building-structure/spec.yaml, ver-cy/world-models/card-supplements/wm-blt-001-building-structure.json