space
an empty area (usually bounded in some way between things)
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to recognise a bounded or contextually delimited empty area, assess its available extent and accessibility, and judge whether a proposed use fits its current conditions.
Space is a bounded, occupiable emptiness between material things, treated as a physical object of measure rather than as an abstract container.
It can be Locate and delineate an empty area relative to surrounding things.; Measure its extent and the clearances relevant to a proposed use.; Assess whether an object can fit in a specified position and orientation.; Assess whether an entity can enter, cross, or leave through connected openings.; Compare observations to detect narrowing, obstruction, merging, or division of the space.; Propose creating or enlarging a gap by moving specified surrounding objects, subject to those objects' constraints and permissions..
Distinguishing features
The referent is the empty area between or within surrounding things, rather than the material of those things.
Its extent can be identified by physical limits or an explicit delimitation rule; a coordinate alone identifies a location, not this space.
It need not be completely enclosed: a gap between two objects can qualify when its other limits are stated.
Calling it empty requires a stated criterion; the presence of air does not by itself establish whether the area is unavailable.
Its identity does not require the construction, services, or designated function that would make an enclosure a room.
Scope
+ Physical or explicitly designated limits of an empty area
+ Extent, shape, clearances, and internal continuity
+ What counts as empty for the observation or proposed use
+ Openings and connections to neighbouring spaces
+ Changes in available space caused by moving boundaries or obstructions
- The material composition and structural integrity of surrounding objects
- Rooms, buildings, and other constructed enclosures as functional assets
- Objects, substances, or people occupying or obstructing the area
- Ownership, permissions, and reservations as independently managed records
- Abstract mathematical spaces, digital storage space, and outer space as an astronomical domain
Characteristics
- Delimitation basis
- physical boundaries | designated limits | mixed | unresolved Shows whether the agent can observe the limits directly or must apply a supplied rule.
- Boundary relations
- surrounding things or surfaces, with the portion and side that bound the space Identifies what separates this space from adjacent material or other spaces.
- Represented extent
- m² for an area; m³ only where a three-dimensional extent is established Quantifies available extent without silently treating every area as a volume.
- Limiting clearance
- m, with direction, location, and measurement uncertainty A narrow section can prevent passage or placement despite a large total extent.
- Emptiness criterion
- explicit classes of matter or occupants counted as obstructions, at a stated detection scale Makes an empty-space assessment interpretable and repeatable.
- Observed vacancy
- clear | partly obstructed | fully obstructed | unknown, relative to the emptiness criterion Distinguishes confirmed available area from obstructed or unobserved portions.
- Spatial connections
- adjacent spaces and connecting openings, including direction and limiting dimensions An area may be empty yet unreachable through the available openings.
- Boundary mobility
- fixed over the stated interval | moving | potentially moving | unknown Determines whether a measured gap is likely to persist long enough for a proposed action.
Analytical facets
- substance
- form
- origin
- conceptual
- agency
- inert
- mobility
- not-applicable
- scale
- not-applicable
- affordances
- observable
Also called
+128
Where this came from
oewn:2024 · CC BY 4.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 30 questions.
Delimitation and identity Establishes which empty area is being referred to and how its limits are determined.
Empty areas often lack a complete enclosure, so their identity cannot be inferred from a surrounding object alone.
Physical and designated limits
Separates observed bounding surfaces from limits introduced by a reference rule.
Extent delimitation
Record the things or surfaces that bound the area and the rule used wherever no physical boundary closes it.
- Which surfaces or surrounding things delimit this empty area, and on which sides? boundary
- Where the area opens into a larger expanse, what rule determines where this space ends? definition
- Which limits were observed, and which were supplied by a person, plan, or other reference? provenance
Separation from neighbours
Determines whether nearby empty regions belong to this space or are separately identified.
Space individuation
Record the basis for treating this area as one space despite openings, partial dividers, or continuity with neighbouring emptiness.
- What distinguishes this space from the empty area immediately beyond each open limit? boundary
- Does a partial divider create separate spaces here, or only distinguish portions of one space? definition
Geometry and clearance Describes the shape and dimensions that determine what can fit within the space.
Total area alone cannot establish usefulness when a gap is tapered, irregular, shallow, or locally constricted.
Extent and shape
Establishes the dimensional interpretation and geometric envelope of the area.
Measured envelope
Record the footprint or spatial envelope, its reference frame, and the evidence supporting its measured limits.
- Is this space being represented as an area on a specified surface or as an extent with height or depth? definition
- What are its measured limits and extent in the chosen reference frame, including uncertainty? measurement
Local fit constraints
Identifies the local dimensions that constrain placement within an irregular space.
Fit and narrowing
Record where the space narrows and compare the proposed object's envelope with the available clearance in a specified configuration.
- Where are the limiting widths, heights, or depths, and in which directions were they measured? measurement
- Can the proposed object occupy the intended position and orientation with the required clearance margin? action
Emptiness and obstruction Makes the claim that an area is empty explicit, observable, and relative to a stated criterion.
A physical space can contain a medium or small objects while remaining empty for one use and obstructed for another.
Emptiness interpretation
Defines which presences matter when recognising or assessing the empty area.
Relevant absence
Record what must be absent and the spatial scale at which that absence is assessed, without equating emptiness with vacuum.
- Which occupants, objects, or substances would make this area nonempty for the stated assessment? definition
- What minimum obstruction size or detection threshold applies to the claim that the area is clear? measurement
Observed free portions
Distinguishes verified clear portions from obstructions and observation gaps.
Clearance evidence
Record the observed free region, excluded obstructions, and portions whose vacancy has not been established.
- Which portions are confirmed clear, obstructed, or unobserved under the stated emptiness criterion? boundary
- What observation supports that assessment, when was it made, and which portions could it actually reveal? provenance
Openings and reachability Describes how this space connects to other spaces and whether a specified entity can reach it.
An empty area that can contain an object may still have no opening or route through which that object can enter.
Connections through limits
Locates passages through physical boundaries and crossings of designated limits.
Opening configuration
Record each relevant connection, the neighbouring space it reaches, and its current clear dimensions.
- Through which openings or open edges does this space connect to another identified space? boundary
- What are the current clear dimensions and configuration of each connection? measurement
Entry and transit
Evaluates passage for a specified entity, including the room needed to turn or change orientation.
Continuous passage
Record whether a continuous sequence of positions and orientations permits entry, traversal, or exit.
- Can the specified entity pass from the approach space through the opening to its intended position? action
- Where along that movement does its swept envelope encounter insufficient clearance or an unmeasured section? measurement
Persistence and use Relates the observed empty area to changes over time and the requirements of a proposed action.
A gap can appear, vanish, or change shape as surrounding things move, and occupying it can alter the very vacancy being assessed.
Changing spatial extent
Tracks how moving boundaries and new obstructions affect the available area.
Space change
Record observed or supported anticipated changes in the gap, including narrowing, closure, division, and merging.
- Which bounding things or obstructions can move, and how does their movement change the clear region? boundary
- For what interval is the current spatial assessment supported, and what evidence establishes that interval? provenance
Use-specific availability
Determines whether the space meets the spatial requirements of a stated use and identifies dependencies on neighbouring models.
Proposed use assessment
Compare the proposed use with available extent, passage, and duration, while linking any required permission, support, or environmental assessment to its responsible model.
- Does the space remain sufficiently clear and reachable for the proposed use throughout its required duration? action
- Which additional conditions, such as permission, supporting-surface capacity, or environmental suitability, must be checked in linked models before proceeding? action
- If the use occupies or subdivides this area, which remaining empty portions need to be reassessed? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- room or enclosure volume
- clearance gap
- void or cavity
- circulation space
- buffer or setback
- interstitial service space
- negative space in a composition
- airspace of a bounded site
- Which of these kinds and varieties hold for the sense of space this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q107494195 - architectural space as a bounded volume
- IFC - IfcSpace - entity for a bounded area or volume in a building model
- OmniClass - Table 13 Spaces by Function (13-xx xx xx) - North American construction classification of spaces
- Which of these identifiers and schemes hold for the sense of space this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- ISO 6707-1:2020 vocabulary for buildings and civil engineering works (ISO)
- ISO 12006-2:2015 classification framework treating spaces as construction entities (ISO)
- buildingSMART IFC4.3 IfcSpace spatial-structure entity (buildingSMART International)
- IBC / occupancy and means-of-egress provisions governing usable space (International Code Council)
- Which of these standards and regulation hold for the sense of space this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Measured as net or gross floor area and as room volume for letting, fire load, HVAC, and occupancy.
- Specified as clearance around equipment, vehicles, and people so that movement and maintenance remain possible.
- Recorded as voids, shafts, plenums, and cavities that carry services or remain unoccupied.
- Used as a planning unit: a named room, bay, plot airspace, or setback that can be assigned, leased, or restricted.
- Which of these real-world use hold for the sense of space this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- floor area - 1-10 000 - m²
- enclosed volume - 2-50 000 - m³
- clear height - 2.1-12 - m
- clearance gap - 0.025-3 - m
- Which of these typical measurements hold for the sense of space this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Insufficient clearance causing collision, entrapment, or blocked egress.
- Unaccounted voids accumulating fire, smoke, moisture, or contaminants.
- Over-occupancy of a bounded space beyond its designed load or ventilation.
- Ambiguous boundaries leading to double-counted area or disputed tenure.
- Which of these failure modes and hazards hold for the sense of space this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- BOMA (North America) versus IPMS (international) area measurement of the same bounded space.
- UK/Commonwealth 'void' and 'storey height' practice versus US 'plenum' and 'clear height' terminology.
- Setback and air-rights rules that treat the empty volume above a lot as property in some jurisdictions and as public airspace in others.
- Which of these regional variation hold for the sense of space this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- place - A place is a located setting with social meaning; a space here is the empty bounded extent, even if unnamed.
- room - A room is one kind of fully enclosed space; space also covers gaps, shafts, and theoretically bounded volumes.
- volume (geometry) - Geometric volume is a measure of any solid or region; this space is specifically the unoccupied or occupiable emptiness between things.
- outer space - Astronomical space is the near-vacuum beyond Earth; this sense is a terrestrial empty area between objects.
- clearance (dimension) - Clearance is the measured gap; the space is the empty region that gap describes.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of space this model covers, and on what evidence? provenance
Sources
- ISO 6707-1:2020 Buildings and civil engineering works - Vocabulary - Part 1: General terms - Defines space as a three-dimensional volume bounded by physical or imaginary surfaces in the built environment.
- ISO 12006-2:2015 Building construction - Organization of information about construction works - Part 2: Framework for classification - Places spaces as classified construction entities distinct from elements and built complexes.
- IFC4.3 SPACE entity (buildingSMART International) - Models a space as an area or volume bounded actually or theoretically, with identifiers and quantities used in practice.
- OmniClass Table 13 - Spaces by Function - Shows the functional kinds of spaces practitioners actually distinguish in construction classification.
What the second pass must settle
- Does the registry intend this entry to cover both two-dimensional empty areas and three-dimensional voids, or should volumetric cases link to a neighbouring concept?
- Under what identity rule does a space persist when it becomes fully occupied and later becomes empty again?
- What minimum delimitation is required for an open area to count as one registered space rather than an arbitrary portion of a larger expanse?
- Which emptiness criteria and observation thresholds are appropriate across intended domains, and must every assessment state them explicitly?
- When moving surrounding things split or merge empty regions, should the resulting spaces retain earlier identities or receive new ones?