fixture
Enable an agent to recognise a fixture, assess its attachment and service condition, and determine what inspection, use, maintenance or removal is appropriate.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 16 findings · 26 questions
Fixture identity Establishes whether the object falls within the registered physical sense of fixture.
Fixed placement
Examines the evidence that attachment holds the object in place.
Attachment evidence
Records the observed or documented basis for treating the object as firmly fixed.
- What physical attachment holds this object in its installed position? definition
- What must be released or broken to relocate it, beyond disconnecting a service lead or hose? boundary
Object and support boundary
Separates the fixture from its supporting construction and specialised service identity.
Fixture extent
Identifies which parts constitute the attached object and which belong to adjacent models.
- Where does the fixture end and the supporting wall, floor, ceiling or frame begin? boundary
- Which specialised object model describes its service beyond being fixed in place? boundary
Mounting and support Describes the fixing arrangement and how it transfers forces into a support.
Mounting interface
Identifies fixings, contact surfaces and the receiving substrate.
Fixing arrangement
Records the installed attachment method and evidence for concealed mounting details.
- What fixing types, quantities and positions connect the fixture to its support? measurement
- What inspection or installation record identifies the substrate and any concealed anchors or backing? provenance
Attachment loading
Relates fixture weight and use forces to the installed support arrangement.
Load transfer
Captures loading relevant to the mounting interface without assuming a generic fixture capacity.
- What weight, contents, user forces or operating forces must this attachment carry, and in which directions? measurement
- What evidence establishes permitted loading for this fixing arrangement in this substrate? provenance
Installed fit and service Connects fixed position with intended use, access and service connections.
Position and clearance
Examines the spatial consequences of a fixed installation.
Usable installed position
Records placement and clearances needed for operation, cleaning and access to fixings.
- What are the fixture's mounting height, orientation and clearances relative to relevant surfaces or moving parts? measurement
- Can its intended users operate it and reach necessary cleaning or maintenance points in this position? action
Service interfaces
Distinguishes mechanical attachment from connections serving the fixture's function.
Connected services
Identifies connected services and how their interfaces constrain intervention.
- Which service connections cross the fixture boundary, and which are independent of its mechanical support? boundary
- Where and how can each applicable service be isolated before the fixture is opened or detached? action
Attachment condition Assesses deterioration of the installed fixing system and its surroundings.
Fixing integrity
Examines movement and deterioration at attachment points.
Attachment defects
Records observed looseness, separation or material damage without equating absence of visible damage with verified capacity.
- What movement, gaps, missing fixings, corrosion or bond separation are visible at the mounting interface? measurement
- Which attachment points remain concealed or unassessed, and what evidence is available for their condition? provenance
Support interface damage
Examines local support damage and changes that affect the installed fixing.
Substrate and use changes
Relates damage around the attachment and changed use to the need for reassessment.
- What cracking, crushing, moisture damage or deformation is present around the attachment points? measurement
- Have impact, changed loading or alterations to the support created a need to restrict use or reassess the installation? action
Intervention and removal Plans work that changes or releases the fixture's installed attachment.
Controlled detachment
Establishes how the fixture can be supported and released.
Release sequence
Records the intervention sequence, access needs and expected consequences of releasing fixings.
- In what sequence must covers, connections and fixings be released, and when is temporary support needed? action
- Which bonds, embedded parts or finishes are expected to be damaged during separation? boundary
Replacement and reinstatement
Addresses reuse of mounting interfaces and the condition left after removal.
Mounting interface disposition
Determines whether the existing interface can receive a replacement or needs repair.
- What evidence supports reusing the existing holes, anchors or backing for the replacement fixture's geometry and loads? provenance
- What repair, sealing or service termination is needed at the former mounting location? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of fixture this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of fixture this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of fixture this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of fixture this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these regional variation hold for the sense of fixture this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of fixture this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- noun.artifact
- Plane
- PHY
- Domain
- PHY.OBJ
- Tags
- artifact
- Facets: substance
- material
- Facets: origin
- manufactured
- Facets: agency
- inert
- Facets: mobility
- portable
- Facets: scale
- handheld
- Facets: affordances
- graspable
- Other names and narrower kinds
- bathroom fixture, chandelier, pendant, pendent, fluorescent, fluorescent fixture, indirect lighting, kitchen sink, lighting fixture, plumbing fixture, sink, soap dish
What it is Filled
A fixture is a physical object securely attached to a building, another structure, or the ground and intended to remain in its installed position during ordinary use.
In scope
- Physical evidence that an object is firmly fixed in its installed position
- Attachment methods, mounting interfaces and supporting substrates
- Installed position, access and clearance constraints
- Intended service and any connections affected by installation
- Attachment condition and requirements for maintenance, detachment or replacement
Out of scope
- Movable furnishings and equipment merely resting in position
- The building or supporting structure as a whole
- Detailed operating models of specialised objects such as luminaires, taps or appliances
- Legal classification as real property, ownership and tenancy rights
- Sports fixtures, scheduled events and software test fixtures
- Manufacturing jigs and workholding fixtures as a separate functional concept
Why it exists Filled
Enable an agent to recognise a fixture, assess its attachment and service condition, and determine what inspection, use, maintenance or removal is appropriate.
Distinguishing features Filled
- Look for a physical attachment that holds the object in its installed position; weight or habitual placement alone does not establish fixture status.
- Determine whether relocation requires releasing, cutting or otherwise undoing an attachment rather than simply lifting or rolling the object away.
- Identify a supporting surface or structure and a distinguishable object attached to it, rather than treating every integral building component as a fixture.
- Distinguish fixed installation from a service cable or hose that connects an otherwise movable object.
- Use the registered physical sense of fixture without assuming that it establishes the object's legal property status.
What robots and AI may and may not do Filled
Must not
- Remove or alter fixtures in a property without the owner's authority.
- Work on fixtures connected to gas, water or electricity without authorization and compliance with applicable safety and professional qualification requirements.
- Misstate which fixtures are included when describing a property for sale or rent.
- Give binding legal advice on whether an item is a fixture in a specific dispute.
Only with a human decision
- Removing fixtures when a property is sold or a tenancy ends.
- Deciding a dispute about whether an item counts as a fixture.
May
- Inventory and report the condition of fixtures in a building for its owner or manager.
- Explain the general distinction between fixtures and movable items in property transfers.
Moral aspects Filled
- Physical attachment alone does not determine ownership when property changes hands; ownership depends on applicable law and agreements.
- Poorly secured fixtures can fall and injure people.
Who is affected
- Owners and buyers have interests in fixtures.
- Tenants have interests in fixtures.
- Occupants and visitors can be affected by fixture safety.
Owners Filled
Steward
The person or body responsible for the fixture under applicable law and agreements; physical attachment alone does not establish ownership.
Master systems
- A land registry or cadastre may hold relevant property records.
Links to other meta-models Filled
parent
- oewn-00022119-n - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.fixture
- Open English WordNet: oewn-03359459-n
Direct properties required Filled
- Fixture subtype and intended service: Lighting, sanitary, storage, support, decorative or another specified service
- Supporting substrate: Identified wall, floor, ceiling, frame or other support, with substrate material where known
- Attachment method: Screwed, bolted, anchored, bonded, welded, embedded, clamped, mixed or unknown
- Installed position and orientation: Location relative to a named support and reference frame
- Fixture mass: kg; measured or documented, with uncertainty
- Documented permitted loading: N and N·m, with direction, application point and applicable installation conditions; unknown if unsupported
- Attachment condition: No defect observed, loose, displaced, corroded, cracked, partly detached, inaccessible or unassessed
- Service connections: Identified electrical, water, drainage, gas, ventilation or other connections; none or unknown
- Detachment reversibility: Releasable without expected damage, finish repair expected, destructive separation expected or unknown
Recognition required Filled
- An item bolted, built in or plumbed into a building, such as a fitted sink, radiator or built-in cupboard.
Capabilities and actions required Filled
- Classify an installed object as a fixture using observed attachment evidence.
- Locate its mounting points, support and connected services.
- Assess whether a proposed use fits documented installation and loading constraints.
- Inspect for movement, fixing deterioration and damage around mounting points.
- Plan maintenance access, service isolation and temporary support where applicable.
- Plan detachment or replacement, including repair of the vacated mounting interface.
Hazards and failure modes required Filled
- Badly fixed items can fall and injure people.
- Removing connected fixtures can cause leaks, gas escapes or electric shock.
Standards and interfaces not applicable Not applicable
Not applicable
No single standard or regulation applies to fixtures as a whole without specifying the fixture type, function and installation jurisdiction.
Context of use required Filled
- Fixtures occur in buildings, outdoor installations and infrastructure where an object must remain attached during ordinary use.
- They support functions such as lighting, sanitation, storage, access control and equipment mounting.
- Inspection and maintenance consider both the installed object and its attachment to the supporting structure.
Sources Filled
- Open English WordNet 2024, synset oewn-03359459-n - sense and gloss of the concept
- Wiktionary: fixture - word senses and usage
Open questions
- Where should this registry draw the boundary between a fixture and an integral building component, especially for embedded or built-in objects?
- Do anti-tip restraints and readily releasable mounting brackets establish fixture status, or require a more specific attachment criterion?
- Which existing Vercy models already cover fixture subtypes, mounting hardware and supporting structures, and how should this model reference them?
- Which subtype-specific installation instructions, inspection methods and governing standards should supply evidence for attachment and service requirements?
- How should secure attachment be assessed when fixings or substrates are concealed and inspection could disturb the installation?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-fixture/spec.json