location identifier
Enable an agent to interpret a location identifier, establish which location it denotes in a stated context, assess whether that association remains usable, and choose appropriate lookup or reference actions.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 18 findings · 30 questions
Designation and namespace Establishes what the recorded value means as an identifier and which rules govern its interpretation.
Identifier representation
Separates the original designation from permitted comparison or display forms.
Significant characters
Record which characters and formatting distinctions the scheme treats as meaningful.
- What is the exact recorded value, including leading zeros, case and separators? definition
- Which transformations are explicitly permitted without changing the identifier's meaning? action
Namespace context
Identifies the scheme and any additional context needed to interpret the value.
Qualified location reference
Record the namespace and contextual qualifiers required to distinguish this assignment from others.
- Which scheme or local convention assigns this value? provenance
- Must the value be qualified by a jurisdiction, parent site, issuer or date to identify a location? boundary
Location referent and granularity Establishes which kind of location is designated and the extent of that reference.
Designated location kind
Distinguishes a location reference from references to occupants, assets or services associated with it.
Direct referent
Record what the identifier directly denotes rather than inferring its referent from nearby entities.
- Does this designation identify a geographic place, facility, sublocation or another kind of location? definition
- Does the issuing record identify the location itself or an organisation, asset or service situated there? boundary
Spatial specificity
Captures how precisely the designated location supports the intended use.
Extent and access point
Distinguish the designated location's extent from any representative point or access point returned with it.
- What location extent or level of subdivision does the assignment cover? boundary
- If a lookup returns coordinates, do they represent the location, its centre, an entrance or some other point? definition
- Is this specificity sufficient for the proposed delivery, navigation or record-linking action? action
Assignment and resolution Connects a designation to evidence of assignment and to a usable lookup procedure.
Assignment evidence
Records who established the identifier-location association and where it can be checked.
Supported association
Track the source record supporting this particular assignment and distinguish it from inferred matches.
- Who assigned the designation, and which inspected record supports its association with this location? provenance
- Is the association explicitly recorded, locally asserted or inferred from matching names and addresses? provenance
Lookup outcome
Defines how the identifier can be resolved and how unsuccessful or ambiguous results are interpreted.
Resolution evidence
Record the lookup context, returned candidates and limits of the result.
- Which directory, service or local register can resolve this namespace, and what input qualifiers does it require? action
- Did the lookup yield one location, several candidates, no record or an unavailable service? measurement
- When was the lookup performed, and which record version or effective date did it consult? provenance
Assignment over time Tracks the period during which a designation refers to a particular location and how that association changes.
Validity and reuse
Separates the lifespan of an identifier assignment from the lifespan of the location.
Time-qualified assignment
Record assignment dates and any evidence that the same value has denoted another location.
- During which period is this value documented as identifying this location? measurement
- Can this namespace reassign retired values, and is any previous or subsequent assignment documented here? boundary
Retirement and succession
Distinguishes designation changes from changes to the designated location.
Replacement meaning
Record whether a replacement preserves the referent or follows a relocation, split, merger or other change.
- Does a replacement identifier designate the same location or a changed successor location? boundary
- For a present lookup or historical citation, should the agent retain this value, follow a successor or present both? action
Comparison and use Supports justified comparisons and decisions about using a resolved location reference.
Cross-scheme matching
Evaluates whether identifiers in different namespaces denote the same location at compatible granularity.
Mapping strength
Record the evidence and spatial relationship behind a proposed correspondence.
- What evidence establishes that the two identifiers designate the same location rather than nearby or similarly named places? provenance
- Is the correspondence exact, broader, narrower, overlapping or unresolved, and for which assignment periods? boundary
Action readiness
Assesses whether the identifier is sufficiently resolved, current and specific for a proposed use.
Usable location reference
Connect remaining uncertainty to the information an agent must obtain before relying on the identifier.
- Which unresolved namespace, validity or granularity issue could change the location selected for this action? boundary
- What additional qualifier or authoritative lookup would make the reference usable for the intended task? 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 location identifier 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 location identifier this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these identifiers and schemes hold for the sense of location identifier this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these standards and regulation hold for the sense of location identifier 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 location identifier 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 location identifier 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 location identifier 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 location identifier this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Information and virtual systems
- Entry kind
- thing
- Plane
- INF
- Domain
- INF.MED
- Other names and narrower kinds
- airport identification code
What it is Filled
A location identifier is a code assigned within a defined scheme to identify an air-navigation location or facility, or a weather station.
In scope
- Identifier values, representations and namespaces belong to air-navigation or weather-station identification schemes.
- The designated referent is an air-navigation location or facility, or a weather station.
- Assignment authorities and supporting evidence establish the association between a code and its referent.
- Lookup, disambiguation and cross-system mappings concern these air-navigation and weather-station codes.
- Validity periods, retirement, reassignment and replacement affect the interpretation of these codes.
Out of scope
- The physical location, its condition and its operational capabilities are outside this identifier model.
- Geometry, surveying observations and coordinate reference systems are outside this identifier model.
- Transport routes and navigation instructions are outside this identifier model.
- Network resource addresses are outside this air-navigation and weather-station code sense.
- Generic geographic identifiers, street addresses, coordinate strings and ordinary place names are outside this sense.
Why it exists Filled
Enable an agent to interpret a location identifier, establish which location it denotes in a stated context, assess whether that association remains usable, and choose appropriate lookup or reference actions.
Distinguishing features Filled
- A qualifying code identifies an air-navigation location or facility, or a weather station, within an established identification scheme.
- The identifier and the location are distinct: changing a designation need not mean the location changed.
- A bare value is insufficient where different namespaces or assignment periods can give it different referents.
- A name, street address or coordinate string does not qualify merely because it can identify a geographic location.
- An identifier for an organisation or asset is not automatically a location identifier merely because that entity occupies a place.
What robots and AI may and may not do Filled
Must not
- Use an identifier from one scheme as if it belonged to another.
- Present a withdrawn or reassigned code as current.
- Use a location identifier in flight planning or safety messages without checking the official publication.
- Invent a code for a facility that has none.
Only with a human decision
- Changing a location identifier in operational data such as flight plans or routing systems.
May
- Resolve a location identifier to the facility it designates, naming the scheme it comes from.
- Flag codes that are ambiguous across schemes, such as three-letter and four-letter airport codes.
Moral aspects Filled
- Wrong codes in aviation and logistics send people, cargo or emergency help to the wrong place.
- Code assignments can carry political weight where territory is disputed.
Who is affected
- Passengers and crews
- Airport and air traffic operators
- Shippers and travellers
Owners Filled
Steward
The body that runs the identification scheme, such as a civil aviation authority or an international organization.
Master systems
- Official location indicator publications
- Aeronautical information publications
Links to other meta-models Filled
parent
- Q36214810 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.location-identifier
- Wikidata: Q568407 (https://www.wikidata.org/wiki/Q568407)
Direct properties not applicable Not applicable
- Identifier value: Recorded designation with its original spelling, case, separators and leading zeros
- Namespace: Reference to the assigning scheme and applicable jurisdiction or context
- Location referent: Reference to the designated location, supported by assignment or lookup evidence
- Referent granularity: Scheme-defined location type, such as site, facility, entrance, room or area; unknown
- Assignment authority: Organisation, system or documented local convention responsible for assignment
- Assignment status: Unverified, active, retired, superseded, disputed or unknown, mapped to scheme terminology
- Assignment validity interval: Start and end date-times with stated precision; open-ended or unknown where applicable
- Resolution outcome: One matching referent, multiple candidates, no match, lookup unavailable or not checked
- Cross-namespace correspondence: Evidence-backed equivalent, broader, narrower, overlapping or unresolved location reference
Plane INF: no invented physical properties.
Recognition optional Filled
- A short code of letters, sometimes digits, printed on tickets, baggage tags, charts and flight plans.
- Four-letter codes usually come from the aviation location indicator scheme and three-letter codes from the airline scheme.
Capabilities and actions required Filled
- Validate a designation against the rules of its stated namespace.
- Resolve an identifier to a location using a relevant authority and assignment date.
- Request missing namespace or contextual information when a value is ambiguous.
- Compare identifiers while preserving differences in referent granularity and validity period.
- Follow documented replacements while retaining historical references.
- Determine whether the identified location is specific enough for an intended action.
Hazards and failure modes required Filled
- Confusing two similar codes misroutes baggage, cargo or travellers.
- Outdated codes in navigation or planning data can cause operational errors.
Standards and interfaces required Filled
- ICAO Doc 7910 Location Indicators, International Civil Aviation Organization.
Context of use required Filled
- Location identifiers are encountered in aeronautical charts, flight plans, weather reports and facility directories.
- They allow people and information systems to reference airports, navigation facilities or weather stations concisely.
- Interpretation requires the identification scheme and a suitable reference date because different schemes can assign different codes to the same place or reuse similar codes.
Sources Filled
- Wikidata item Q568407: location identifier - identity and sense of the item
- Wikipedia: Location identifier - general description of the item
Open questions
- Does the registry intend a general class of location identifiers or a narrower concept such as transport facility codes?
- Does this entry include addresses, place names and coordinate-derived designations when used as identifiers, or do neighbouring entries own those forms?
- Are logical and virtual locations included, or is the intended scope limited to physical and geographic locations?
- Which existing Vercy models already own identifier namespaces, location geometry and assignment authorities, and could any already cover this concept?
- Which representative authoritative schemes should research examine to establish actual rules for uniqueness, normalization, reassignment and historical resolution?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q568407/spec.json