World Models · public research draft

Location Referencing / Address

Provide a format-neutral, reusable referencing fabric — addresses, thoroughfares, postal designations, geocodes, reference systems, gazetteer identifiers, points of interest and place names — that any subject model can mix in to state where something is, without absorbing the semantics of the thing located.

AI YAMLAGENTS.mdResearch evidence
Research draft. The Claude + Grok synthesis is public for review and use with caution. It passed structural validation but is not yet a canonical Vercy release because the source and coverage holds below remain open.
Catalogue IDWM-XCT-010
Version0.3.0-research.1
Previous version-
Typemixin
ValidationPassed
Synthesis digestsha256:c1e936d8684cb706…
33Sources
6Bundles
16Layers
28Findings
128Questions
22Artifacts
Format-independent logical structure

Bundles → Layers → Findings → Questions + Artifacts

address-recordAddress record and structure2 layers

What an address is as a governed record: its identifier, the specification and class it instantiates, the components that scope it, the locators that pinpoint it, and its aliases and rendered representations.

address-identityAddress identity and classification2 findings

Identifiers that make an address referable and de-duplicable, and the class and specification profile that determine which structure is legal for it.

address-identifier-and-uniqueness

Address identifier and uniqueness scope

The identifier or identifiers that designate the address record itself, distinct from the identifier of the object addressed or of any position, together with the scope in which uniqueness holds and the change events that force a new identifier.

Questions
  1. Which authoritative master-system identifier designates this address, and which register issued it?identity
    Expected answer
    • Issuing register or authority reference
    • Identifier value
    • Identifier scheme or namespace
  2. Does the address carry a governed global identifier or resolvable IRI in addition to the local register key, and is it persistent?identity
    Expected answer
    • Global identifier or HTTP IRI
    • Persistence commitment and its custodian
    • Resolution endpoint or projection reference
  3. Which alternative, legacy or third-party identifiers are recorded, and to which system is each scoped?provenance
    Expected answer
    • Alternative identifier value
    • Owning system reference
    • Trust or precedence rank
  4. Under which changes does the identifier stay stable, and which change compels minting a new one?lifecycle
    Expected answer
    • Stability rule statement
    • Enumerated identifier-breaking change kinds
    • Supersession link to prior identifier
  5. Within what scope is uniqueness enforced — single register, jurisdiction, country or globally?constraint
    Expected answer
    • Uniqueness scope declaration
    • Duplicate detection rule
    • Collision resolution procedure
Artifacts
  • Address register entryThe authoritative record for one address held by the issuing register, carrying the identifier, components, locators, status and position; the unit that a resolvable identifier dereferences to.
address-classification-and-profile

Address class and governing specification profile

The class of address the record instantiates and the national or community address specification that fixes which components are legal, mandatory or forbidden for that class.

Questions
  1. Which address class does this record instantiate — numbered thoroughfare, landmark, postal delivery, or another declared class?classification
    Expected answer
    • Address class code
    • Class definition source
    • Class-specific mandatory component set
  2. Which address specification or class profile governs this record, and at which version?authority
    Expected answer
    • Specification reference
    • Specification version identifier
    • Issuing community or authority
  3. Does the record designate a location, a point of postal delivery, or both, and how is that role encoded?definition
    Expected answer
    • Role code (location, delivery, dual)
    • Justification or basis
    • Consumers permitted to rely on each role
  4. How does this class map to the corresponding classes of each standard the register claims alignment with?interoperability
    Expected answer
    • Target standard and class
    • Mapping cardinality
    • Unmapped residue note
Artifacts
  • Address specification / class profileThe document or machine-readable profile that declares the address classes recognised in a jurisdiction and the components permitted, required or prohibited for each.
address-compositionAddress composition and locators3 findings

The internal parts of an address: scoping components in their hierarchy, locator designators and sub-address levels, and alias or rendered representations.

address-components-and-hierarchy

Address components and their hierarchy

The administrative, address-area, postal and thoroughfare components that scope an address, the level at which each sits, and whether each is a reference to an authoritative feature or free text.

Questions
  1. Which components scope this address, and what level does each occupy in the hierarchy?composition
    Expected answer
    • Component reference or name
    • Component type (admin unit, address area, postal descriptor, thoroughfare)
    • Hierarchy level index
  2. Which components are mandatory, conditional or prohibited for this class in this country?constraint
    Expected answer
    • Component obligation code
    • Governing condition expression
    • Country or territory scope
  3. Does each component reference an authoritative external feature, or repeat a name as unlinked text?relationship
    Expected answer
    • Referenced feature identifier
    • Owning sibling model
    • Reference-versus-text flag
  4. How are sub-country administrative levels ordered and labelled, and how does that ordering survive exchange?interoperability
    Expected answer
    • Level ordering convention
    • Level labels per country
    • Target-format level mapping
locator-designators-and-subaddressing

Locator designators and sub-addressing

The human-readable designators and names that distinguish the addressable object within its component scope, including house numbers with non-numeric parts and the building, floor, unit, room and seat levels beneath them.

Questions
  1. Which locator designators identify the object within its scope, and at which locator level does each apply?composition
    Expected answer
    • Designator value
    • Designator type code
    • Locator level
    • Component the locator is within the scope of
  2. Is the house number a plain ordinal, a range, a hyphenated compound or a non-numeric token, and how is it normalised for sorting and matching?identity
    Expected answer
    • Raw designator token
    • Parsed numeric part and suffix
    • Normalisation and sort key rule
  3. Which sub-address levels are addressable in their own right, and which are descriptive only?constraint
    Expected answer
    • Recognised sub-address level list
    • Addressable-versus-descriptive flag per level
    • Authority that decides
  4. When a sub-address exists, does it reference a parent address record or stand alone, and what breaks if the parent is retired?relationship
    Expected answer
    • Parent address reference
    • Standalone-versus-derived flag
    • Cascade rule on parent retirement
Artifacts
  • Sub-address designator vocabularyThe controlled list of secondary unit and sub-address designators (apartment, suite, floor, building, room, seat) with approved abbreviations for a territory.
address-alias-and-representation

Address aliases and rendered representations

Alias relations between address records and the language-, script- and purpose-specific rendered forms of the same address, including which form is authoritative for which use.

Questions
  1. Which address records are aliases of which primary address, and what is the alias relation type?relationship
    Expected answer
    • Primary address reference
    • Alias relation type
    • Period during which the alias is honoured
  2. Which rendered or transliterated representations exist, and in which language and script is each written?interoperability
    Expected answer
    • Rendered address text
    • Language tag
    • Script code
    • Transliteration or romanisation system
  3. Which representation is authoritative for legal service of documents, and which for mail delivery?authority
    Expected answer
    • Representation reference
    • Authoritative purpose
    • Deciding authority
  4. May an alias be used as a matching key, and with what confidence penalty?validation
    Expected answer
    • Match-eligibility flag
    • Confidence adjustment
    • Audit requirement when an alias resolves a match
assignment-and-lifecycleAssignment authority, lifecycle and object binding3 layers

Who may create, change and retire an address, under which numbering rules, through which lifecycle states and temporal versions, and to which object in a sibling model the address is bound.

addressing-authorityAddressing authority and numbering rules2 findings

The mandated body, its jurisdiction, and the address reference system whose numbering scheme determines whether a candidate address is well formed.

addressing-authority-and-jurisdiction

Addressing authority, mandate and jurisdiction

The body legally empowered to assign, alter and retire addresses in a territory, the instrument granting that power, the extent within which it applies, and how non-authoritative address creation is handled.

Questions
  1. Which body holds the mandate to assign, alter and retire addresses here, and under what legal instrument?authority
    Expected answer
    • Authority identifier
    • Mandate instrument reference
    • Mandate effective period
  2. Who stewards the address record, as distinct from whoever owns the object addressed?ownership
    Expected answer
    • Steward role and party reference
    • Stewardship scope
    • Escalation contact
  3. What is the geographic extent of the authority's jurisdiction, and how are overlaps or gaps at its boundary resolved?spatial
    Expected answer
    • Jurisdiction extent geometry or identifier
    • Overlap precedence rule
    • Gap escalation procedure
  4. What status is given to an address created by a developer, occupier or crowd source rather than the authority?exception
    Expected answer
    • Non-authoritative origin flag
    • Adoption or rejection procedure
    • Interim usability constraints
Artifacts
  • Addressing mandate instrumentThe statute, ordinance, by-law or delegation document that designates an addressing authority and delimits its jurisdiction and powers.
address-reference-system-rules

Address reference system and numbering rules

The numbering scheme governing an area — axis origin and direction, block ranges, intervals, parity and reservation rules — and the tests that decide whether a candidate address conforms to it.

Questions
  1. Which numbering scheme governs this address, including axis origin, direction, interval, parity and block ranges?constraint
    Expected answer
    • Reference system identifier
    • Axis and origin definition
    • Interval and parity rules
    • Block range table
  2. What test determines that a candidate number is valid within the governing reference system?validation
    Expected answer
    • Validation rule expression
    • Pass or fail outcome
    • Anomaly status when the test fails
  3. How are numbers reserved, skipped or reissued when a parcel is subdivided or consolidated?process
    Expected answer
    • Reservation policy
    • Gap and infill rule
    • Reissue cooling-off period
  4. Where two schemes overlap the same ground, which one governs, and who decides?exception
    Expected answer
    • Precedence rule
    • Deciding authority
    • Record of the resolution
Artifacts
  • Address reference system definitionThe published definition of a numbering scheme: grid or axis description, range tables, parity conventions and the map or geometry delimiting where the scheme applies.
address-lifecycleLifecycle state and temporal versioning2 findings

Lifecycle status and its permitted transitions, and the separate axes of real-world validity and record version lifespan.

address-lifecycle-status

Lifecycle status and permitted transitions

The current lifecycle status of an address, the transition and evidence that produced it, the distinction between official status and lifecycle status, and how long a retired address remains resolvable.

Questions
  1. What is the current lifecycle status of the address, and which transition produced it?state
    Expected answer
    • Lifecycle status value
    • Transition event reference
    • Transition timestamp
  2. Which transitions are permitted, who may authorise each, and what evidence must accompany them?lifecycle
    Expected answer
    • Permitted transition matrix
    • Authorising role
    • Required evidence type
  3. Is a retired address retained for historical resolution, and for how long does it stay resolvable?retention
    Expected answer
    • Retention decision
    • Resolvable-after-retirement period
    • Tombstone representation
  4. May an address be reserved or proposed before the object exists, and what obligations follow from that state?process
    Expected answer
    • Pre-existence status value
    • Obligations and expiry of the reservation
    • Consumers permitted to use a pre-active address
  5. How does official status differ from lifecycle status in this register, and can a record be active but unofficial?classification
    Expected answer
    • Official status value
    • Lifecycle status value
    • Combination legality matrix
Artifacts
  • Address assignment or retirement decision recordThe authority's decision that creates, changes or retires an address, recording the basis, the affected object, the resulting status and the approving officer.
temporal-validity-and-versioning

Real-world validity versus record version lifespan

The two distinct time axes an address carries — the period the address is valid in the real world, and the period a particular version of the record was current in the register — together with observation and ingestion times and the separation of corrections from real change.

Questions
  1. When did the address become valid in the real world, and when did it cease to be valid?temporal
    Expected answer
    • Valid-from timestamp
    • Valid-to timestamp
    • Basis for each boundary
  2. When did this version of the record begin and end in the register, independent of real-world validity?temporal
    Expected answer
    • Version begin timestamp
    • Version end timestamp
    • Version identifier
  3. Are all recorded times expressed per RFC 3339 with seconds and an explicit offset or Z, and how is an unknown local offset represented?constraint
    Expected answer
    • Timestamp format conformance statement
    • Offset handling rule including -00:00 for unknown offset
    • Validation test result
  4. How is a correction to a past record distinguished from a real-world change, and does a correction alter the validity period?provenance
    Expected answer
    • Change kind code
    • Corrected attribute list
    • Effect on validity versus version period
  5. What is the observation or ingestion time of this version, and does it differ from the event time it reports?provenance
    Expected answer
    • Observed or ingested timestamp
    • Event timestamp
    • Lag and its cause
Artifacts
  • Address register change logThe ordered history of record versions for an address or register, from which any past state can be reconstructed and corrections told apart from real-world change.
addressable-object-bindingBinding to the addressable object1 findings

How an address attaches, as a mixin, to an object owned by a sibling model, and what governs that attachment.

finding-addressable-object-binding

Address-to-object binding and its basis

The act that binds an address to an addressable object in another model, its evidential basis, its cardinality in both directions, its exclusivity per purpose, and what happens when the object is demolished, merged or subdivided.

Questions
  1. Which addressable object does this address designate, in which sibling model, and by which identifier?relationship
    Expected answer
    • Object identifier
    • Owning model reference
    • Object kind (building, parcel, unit, other)
  2. Can one object hold several addresses and one address designate several objects, and which combinations are legal here?composition
    Expected answer
    • Cardinality rule in each direction
    • Legal multiplicity exceptions
    • Primary-address selection rule
  3. What basis justified the binding — building permit, survey, occupancy certificate or field observation?evidence
    Expected answer
    • Basis code
    • Supporting document reference
    • Recording officer
  4. What happens to the address when the object is demolished, merged or subdivided?lifecycle
    Expected answer
    • Cascade policy per object event
    • Resulting address status
    • Successor address links
  5. Is the binding exclusive for legal service, emergency dispatch and delivery alike, or may these differ?constraint
    Expected answer
    • Purpose-specific binding
    • Conflict resolution rule
    • Authoritative source per purpose
Artifacts
  • Address binding recordThe record of the act that attaches an address to an addressable object, carrying object reference, basis, purpose and effective period; the concrete form the mixin takes when applied to a host subject.
thoroughfare-and-postalThoroughfares and postal designation2 layers

Named ways used in addressing and their continuity across renaming, and the postal descriptors, delivery point types and templates that turn a stored address into a deliverable one.

thoroughfare-namingThoroughfare identity, naming and continuity2 findings

Official names of streets, roads and waterways used for addressing, their decomposition into parts, and their behaviour under renaming, splitting and merging.

thoroughfare-identity-and-naming

Thoroughfare identity and name decomposition

The identifier of a thoroughfare independent of its current name, the decomposition of a complete street name into directional, type, modifier and base parts, its addressing-relevant extent, and the kinds of way admissible for addressing.

Questions
  1. Which identifier designates the thoroughfare independently of whatever name it currently bears?identity
    Expected answer
    • Thoroughfare identifier
    • Issuing register
    • Stability rule across renaming
  2. How is the complete street name decomposed into pre-directional, pre-type, pre-modifier, base name, post-type, post-directional and post-modifier parts?composition
    Expected answer
    • Complete street name string
    • Part values by part type
    • Ordering and separator rules
  3. What is the addressing extent of the thoroughfare, and how does it link to the transport network feature that carries its geometry?spatial
    Expected answer
    • Transport link references
    • Extent description or geometry reference
    • Segmentation used for numbering
  4. Which kinds of way are admissible as addressing thoroughfares in this jurisdiction, and which are excluded?classification
    Expected answer
    • Admissible thoroughfare kinds
    • Exclusions and their basis
    • Handling of unnamed ways
Artifacts
  • Official street name register entryThe authority's record of an officially named thoroughfare, carrying identifier, name forms, kind, extent and approval reference.
thoroughfare-renaming-and-continuity

Renaming, splitting and name continuity

How renaming, splitting and merging events are recorded, how long superseded names remain usable for delivery, dispatch and legal documents, and what happens to the addresses on the affected way.

Questions
  1. What renaming, splitting or merging events has this thoroughfare undergone, and when did each take effect?event
    Expected answer
    • Event kind
    • Effective timestamp
    • Prior and resulting thoroughfare references
  2. For how long do superseded names remain acceptable for delivery, emergency dispatch and legal documents, and do those periods differ?temporal
    Expected answer
    • Grace period per purpose
    • Authority setting each period
    • Expiry handling
  3. How are the addresses on the thoroughfare preserved or reissued across the change?lifecycle
    Expected answer
    • Affected address list
    • Reissue or preserve decision per address
    • Superseded-by links
  4. Which body approves a renaming, what consultation is required, and where is the decision recorded?authority
    Expected answer
    • Approving body
    • Consultation requirement
    • Decision record reference
postal-deliveryPostal designation, delivery points and rendering2 findings

Postcodes and post names, delivery point types, and the country templates and rules that render stored components into a deliverable address.

postal-descriptor-and-delivery-point

Postal descriptor and delivery point type

The postcode and post name that route mail, the operator that maintains them, whether the descriptor bears an authoritative extent, whether the postal city may differ from the municipality, and which kind of delivery point is designated.

Questions
  1. What postcode and post name apply, and which designated postal operator maintains them?identity
    Expected answer
    • Postcode value
    • Post name
    • Operator reference
    • Source release version
  2. Is this a physical delivery point, a post office box, poste restante, a rural or highway contract route, or a military address?classification
    Expected answer
    • Delivery point type code
    • Delivery point identifier where issued
    • Recipient-location relationship note
  3. Does the postal descriptor have a geographic extent, and is that extent authoritative or an approximation derived from delivery points?spatial
    Expected answer
    • Extent geometry or absence statement
    • Authoritative-versus-derived flag
    • Derivation method
  4. May the postal city name differ from the municipality of location, and which is authoritative for which purpose?constraint
    Expected answer
    • Postal city value
    • Municipality value
    • Purpose-authority mapping
  5. How often does the operator revise postal codes, and how are revisions propagated to bound addresses?process
    Expected answer
    • Release cadence and latest release identifier
    • Propagation procedure
    • Reconciliation backlog measure
Artifacts
  • Postal code and delivery point reference datasetThe operator-maintained reference data used to validate, cleanse and standardise addresses, released as dated versions covering a territory.
postal-template-and-rendering

Postal address template and rendering rules

The country-specific template and rendering rules that select, order, concatenate and format components into output lines, the contextual parameters that vary the result, and the handling of components with no target in the destination template.

Questions
  1. Which country template governs rendering for this destination, at which version, and where is it obtained?process
    Expected answer
    • Template identifier and destination country
    • Template version
    • Template source and licence
  2. What line identification, ordering, concatenation and formatting rules apply, and which components are optional in each line?constraint
    Expected answer
    • Output line definitions
    • Component ordering and separators
    • Required-versus-optional component flags
    • Casing and abbreviation rules
  3. Which contextual parameters change the rendering, such as origin country, domestic versus international, or script?decision
    Expected answer
    • Parameter names and values
    • Resulting variant
    • Default when a parameter is absent
  4. How are addressee and organisation segments kept separate from the location components this model owns?interoperability
    Expected answer
    • Segment boundary definition
    • Party model reference for addressee data
    • Joining rule at render time
  5. What is done when a stored component has no mapping in the destination template?exception
    Expected answer
    • Unmapped component policy
    • Fallback placement or omission
    • Loss disclosure to the caller
Artifacts
  • Country postal address templateThe machine-processable template that expresses a country's postal address rendering rules, together with its human-readable form and the sample address set used to derive and test it.
spatial-referencingSpatial position and reference systems3 layers

Coordinate positions with their meaning, method and accuracy; the coordinate and geographic-identifier reference systems that give them sense; and non-coordinate code and grid references.

geocode-positionPosition, specification and accuracy2 findings

What a stored coordinate actually points at, how it was obtained, which of several positions is default, and how accurate and how precise it is.

position-and-geometry-specification

Position, geometry specification and method

The geometry stored for an address or place, an explicit statement of which real-world feature it specifies (entrance, building, parcel, delivery point, utility connection or segment interpolation), the method by which it was determined, and which position is the default among several.

Questions
  1. What does this position represent — entrance, building, parcel, postal delivery point, utility connection or street segment interpolation?spatial
    Expected answer
    • Geometry specification code
    • Referenced feature
    • Justification where ambiguous
  2. By what method was the position determined, and by whom?provenance
    Expected answer
    • Geometry method code
    • Determining party
    • Determination timestamp
  3. Which of several positions is the default, and which position should routing, dispatch and statistics each use?decision
    Expected answer
    • Default position flag
    • Purpose-to-position mapping
    • Selection rule when the preferred position is missing
  4. In which geometry type and dimensionality is the position expressed, including any vertical or floor-level component?measurement
    Expected answer
    • Geometry type
    • Dimensionality
    • Vertical value or Z-level
positional-accuracy-and-precision

Positional accuracy and meaningful precision

The stated accuracy of a position with its measure and confidence, the number of digits that are actually meaningful, containment tests that detect implausible coordinates, and how accuracy travels to consumers that accept only a bare point.

Questions
  1. What is the stated positional accuracy of this coordinate, under which measure and at what confidence level?measurement
    Expected answer
    • Accuracy value and unit
    • Accuracy measure definition
    • Confidence level
  2. How many decimal places or code digits are meaningful here, and which published digits are spurious precision?quality
    Expected answer
    • Meaningful digit count
    • Ground resolution implied
    • Rounding or truncation policy
  3. What test rejects a position falling outside the parcel, building footprint or jurisdiction it claims?validation
    Expected answer
    • Containment test definition
    • Reference geometry used
    • Result and tolerance
  4. How is accuracy conveyed to a consumer whose format carries only a point without metadata?interoperability
    Expected answer
    • Out-of-band accuracy channel
    • Degradation or refusal policy
    • Consumer warning text
Artifacts
  • Positional accuracy evaluation reportThe record of an accuracy evaluation over a set of positions: method, sample, reference data, measures obtained and containment failures found.
reference-systemsCoordinate and geographic-identifier reference systems2 findings

The systems that give positions and identifiers their meaning: coordinate reference systems with datums and epochs, and spatial reference systems using geographic identifiers with their gazetteers.

crs-and-coordinate-epoch

Coordinate reference system, epoch and axis order

The declared CRS with its authority code and version, whether it is dynamic and therefore requires a coordinate epoch, the axis order and units in force, any vertical CRS, and the coordinate operation used when transforming for a consumer.

Questions
  1. In which coordinate reference system is this position expressed, cited by authority code and dataset version?identity
    Expected answer
    • CRS authority and code
    • Registry dataset version
    • CRS name
  2. Is the CRS dynamic, and if so which coordinate epoch applies to the stored coordinates?temporal
    Expected answer
    • Dynamic-versus-static flag
    • Coordinate epoch
    • Deformation model reference where used
  3. What axis order and units apply, and how is that reconciled with encodings that fix longitude before latitude?interoperability
    Expected answer
    • Axis order as defined by the CRS
    • Encoding axis order
    • Reconciliation or swap rule
  4. Which coordinate operation, at what accuracy, is applied when transforming into a consumer's CRS?process
    Expected answer
    • Operation identifier
    • Operation accuracy
    • Area of validity
  5. Is a vertical or compound CRS declared for any height component, and what is its datum?constraint
    Expected answer
    • Vertical CRS reference
    • Vertical datum
    • Height type
Artifacts
  • Coordinate reference system definition recordThe authoritative definition of a CRS, datum or coordinate operation obtained from a geodetic parameter registry, including area of validity and accuracy, referenced rather than redefined by this model.
geographic-identifier-and-gazetteer

Geographic identifiers, location types and gazetteers

Spatial referencing by geographic identifier: the location types a reference system defines, the location instances that populate it, the gazetteer that is custodian of record, complementary coordinate references, and instance lifecycle.

Questions
  1. Which location types does this spatial reference system define, and what identifier form does each use?definition
    Expected answer
    • Location type names and definitions
    • Identifier form and syntax per type
    • Theme or domain of the reference system
  2. How do location instances nest, adjoin or overlap, and which of those relationships are recorded?relationship
    Expected answer
    • Parent and child instance references
    • Adjacency or overlap assertions
    • Relationship semantics
  3. Which gazetteer is custodian of record for each location type, and over what territory of use?authority
    Expected answer
    • Gazetteer reference and custodian
    • Territory of use
    • Scope and coverage statement
  4. Does each location instance carry a complementary coordinate reference, and at what geometry level?spatial
    Expected answer
    • Complementary position or extent
    • Geometry level (point, bounding, full)
    • CRS of the complementary reference
  5. How are location instances added, merged, split and retired, and are historic instances retained?lifecycle
    Expected answer
    • Instance lifecycle states
    • Merge and split event records
    • Historic retention policy
Artifacts
  • Gazetteer publicationThe published register of location instances for one or more location types, with identifiers, names, positions or extents, and administrative metadata about the custodian and territory of use.
code-based-referencesCode and grid based location references1 findings

Derived, non-coordinate references such as open location codes and grid squares that stand in for an address where none exists.

grid-and-code-based-reference

Open code and grid location references

Code-based location references: the scheme and code length in use, the ground area a length resolves, whether a code is full or shortened and therefore needs a reference location, whether the scheme is openly reversible or vendor-dependent, and its role where no civic address exists.

Questions
  1. Which code scheme is used, at what code length, and what ground area does that length resolve?measurement
    Expected answer
    • Scheme identifier
    • Code value and length
    • Resolved area dimensions
  2. Is the code full or shortened, and if shortened, which reference location is required to recover it?constraint
    Expected answer
    • Full-versus-short flag
    • Reference location or feature
    • Recovery procedure and its ambiguity risk
  3. Is the scheme openly specified and reversible without a proprietary service, or does resolution depend on a vendor?interoperability
    Expected answer
    • Specification availability and licence
    • Vendor dependency statement
    • Offline reversibility flag
  4. How does the code relate to the underlying coordinate reference system and to any civic address for the same place?relationship
    Expected answer
    • Underlying CRS
    • Linked address reference
    • Agreement or discrepancy note
  5. Where no civic address exists, what governs the use of the code as the operative location reference?exception
    Expected answer
    • Accepting parties and purposes
    • Fallback rules
    • Limits on legal or postal use
places-and-namesNamed places and toponyms2 layers

Points of interest used for orientation and discovery, and the toponyms that name places across languages, scripts and periods of official recognition.

points-of-interestPoints of interest1 findings

Named places usable for orientation, discovery and reference, with category, status and confidence.

poi-identity-and-status

POI identity, category, status and confidence

The identifier of a point of interest independent of its operator and name, the taxonomy and level that classify it, its operating status as distinct from opening hours, its resolution to addresses and buildings, and the confidence that it exists at all.

Questions
  1. Which identifier designates the point of interest independently of its operator, brand and current name?identity
    Expected answer
    • POI identifier
    • Issuing scheme or reference system
    • Stability rule across operator change
  2. Which category taxonomy classifies the POI, at which level, and which alternate categories also apply?classification
    Expected answer
    • Primary category and taxonomy
    • Alternate categories
    • Basic-level or human-intuitive category
  3. What is the operating status of the POI, and when was it last confirmed?state
    Expected answer
    • Operating status value
    • Last confirmation timestamp
    • Confirming source
  4. How does the POI resolve to one or more addresses, to a building or unit, and to a brand?relationship
    Expected answer
    • Address references
    • Building or unit reference
    • Brand reference
  5. What existence confidence is asserted, on what evidence, and what threshold gates publication?quality
    Expected answer
    • Confidence score
    • Evidence and contributing sources
    • Publication threshold and reviewer
Artifacts
  • POI catalogue entryThe catalogue record for a point of interest, including identifier, names, categories, position, status, confidence and per-attribute sources; may originate from an operator's own listing submission.
toponymsToponyms and multilingual names1 findings

Place names with their language, script, romanisation, official standardisation status and history.

toponym-language-and-status

Toponym language, script and official status

Which place a toponym names, the language and script of each name form and its relation to a source form, which form is officially standardised by the national names authority, how contested or reinstated names are recorded, and which form to display for a given audience.

Questions
  1. Which named place does this toponym name, and is the same name borne by other places within the same scope?identity
    Expected answer
    • Named place reference
    • Homonym set within scope
    • Disambiguation rule
  2. In which language and script is each name form recorded, and which forms are romanisations of which source form?classification
    Expected answer
    • Language tag
    • Script code
    • Romanisation or transliteration system
    • Source form reference
  3. Which form is officially standardised by the national names authority, and which are endonyms, exonyms or historic forms?authority
    Expected answer
    • Name status value
    • Standardising authority
    • Decision reference and date
  4. How are contested, reinstated or superseded names recorded without erasing prior forms?lifecycle
    Expected answer
    • Name status history with periods
    • Contest or objection record
    • Retention policy for superseded forms
  5. Which name form should a consumer display for a stated audience locale, and what is the fallback?interoperability
    Expected answer
    • Locale-to-form mapping
    • Fallback chain
    • Prohibited or discouraged forms
Artifacts
  • Standardised geographical names listThe national names authority's published list of standardised names with language, script, status and decision references, used as the reference for official display and exchange.
assurance-access-exchangeMatching, quality, provenance, access and exchange4 layers

How references are resolved and scored, how their quality is tested and defects recorded, where each attribute came from and when, under what licence and protection they may be used, and how they cross into other models and encodings without silent loss.

matching-and-qualityMatching, quality tests and anomalies3 findings

Resolution of input strings and positions to reference records with scored outcomes, and the tests, anomalies and defect handling that keep the register trustworthy.

geocoding-and-matching

Geocoding and address matching outcomes

The normalisation and parsing that precede matching, the reference dataset version matched against, the score and type of a match, the threshold that separates automatic acceptance from review, and the explicit representation of ambiguity, partial matches and interpolation.

Questions
  1. What normalisation and parsing steps precede matching, and against which reference dataset version was the match run?process
    Expected answer
    • Normalisation rule set and version
    • Parser and its component output
    • Reference dataset identifier and version
  2. What match score, match type and matched component set does the operation return?measurement
    Expected answer
    • Match score
    • Match type code
    • Components matched and unmatched
  3. Which score threshold accepts a match automatically, and what routes a candidate to human review?decision
    Expected answer
    • Acceptance threshold
    • Review trigger conditions
    • Reviewer role and turnaround
  4. Is the result stored as an attribute of the address or as a separate derived observation with its own timestamp and inputs?provenance
    Expected answer
    • Storage form decision
    • Observation timestamp
    • Inputs and engine version
  5. How are ambiguous, partial and interpolated results represented rather than silently resolved to one answer?exception
    Expected answer
    • Candidate set with scores
    • Interpolation flag and method
    • Disclosure to the consumer
Artifacts
  • Geocoding or matching result recordThe reproducible record of one matching run: input, normalisation applied, reference dataset version, engine version, candidates, chosen result, score and timestamp.
quality-tests-and-anomalies

Quality tests, anomaly status and defect handling

The tests a record must pass — syntax, completeness, conformity to the governing reference system, duplication and positional containment — the anomaly status recorded when it fails, whether an anomalous address remains usable, and how defects are notified and resolved with retained evidence.

Questions
  1. Which quality tests does this record pass or fail, and against which rule set version were they run?validation
    Expected answer
    • Test identifiers and definitions
    • Pass or fail per test
    • Rule set version
  2. What anomaly status applies when the address is not correct under its governing reference system, and may it still be used?quality
    Expected answer
    • Anomaly status value or explanatory note
    • Usability decision
    • Consumers warned
  3. Who is notified of a defect, within what period must it be resolved, and what status applies meanwhile?process
    Expected answer
    • Notified role or party
    • Resolution deadline
    • Interim record status
  4. What evidence is retained to show that a test was executed against a specific record version?evidence
    Expected answer
    • Test execution timestamp
    • Record version tested
    • Executor and tooling version
  5. Is the validation rule set published so that consumers can check records before submitting them?interoperability
    Expected answer
    • Published schema or rule set location
    • Publication licence
    • Version alignment with the register
Artifacts
  • Quality and conformance test reportThe published outcome of running the declared test suite over a register or delivery, listing measures, failures, anomaly counts and the record versions and rule set versions involved.
quality-elements-measures-and-reporting

Quality elements, measures and reporting

ISO 19160-3 is a profile of ISO 19157 that establishes data quality elements and measures for address data, procedures for reporting, and guidelines for use. Elements include completeness, logical consistency, positional accuracy, temporal quality, thematic accuracy and usability. The standard does not define minimum acceptable quality; fitness depends on use.

Questions
  1. Against which dataset or record scope, product specification and intended use was quality evaluated?measurement
    Expected answer
    • quality-scope
    • product-specification
    • intended-use
  2. What completeness, logical consistency, positional accuracy, temporal quality, thematic accuracy and usability results were obtained?measurement
    Expected answer
    • completeness-result
    • logical-consistency-result
    • positional-accuracy-result
    • temporal-quality-result
    • thematic-accuracy-result
    • usability-result
  3. When was the evaluation performed, by which method, and is the result still current relative to subsequent updates?temporal
    Expected answer
    • evaluated-at
    • evaluation-method
    • evaluator
    • currency-flag
  4. Does the consumer impose a minimum quality threshold that ISO 19160-3 itself does not define, and is that threshold recorded as a local constraint?constraint
    Expected answer
    • local-threshold
    • pass-fail
    • constraint-id
Artifacts
  • Address quality reportEvaluation results against ISO 19160-3 elements for a stated scope and use
provenance-and-versioningSource lineage and attribution of facts1 findings

Per-attribute lineage, source and ingestion times, contributor rights and precedence when sources disagree.

source-lineage-and-observation-time

Per-attribute source lineage and observation time

Which source dataset and source record contributed each attribute, the separate source-update, ingestion and event times, the rights a contributor retains in what they contributed, and the precedence rule that decides between conflicting sources without discarding the loser.

Questions
  1. From which source dataset and source record did each attribute of this record derive?provenance
    Expected answer
    • Source dataset identifier
    • Source record identifier
    • Attributes contributed by that source
  2. What are the source update time, the ingestion time and the real-world event time for each contributed attribute, and where do they diverge?temporal
    Expected answer
    • Source update timestamp
    • Ingestion timestamp
    • Event timestamp
    • Divergence explanation
  3. Which contributor holds rights in each contributed attribute, and does that constrain redistribution of the merged record?ownership
    Expected answer
    • Rights holder per attribute
    • Licence terms inherited
    • Effect on redistribution of the whole
  4. When two sources conflict on the same attribute, which precedence rule decides, and is the rejected value retained?decision
    Expected answer
    • Precedence rule and its basis
    • Winning and rejected values
    • Retention of the rejected assertion
  5. What confidence does each source attach to its own assertion, and how is that combined into the published record?quality
    Expected answer
    • Per-source confidence
    • Combination method
    • Published confidence value
access-and-protectionLicensing, access and protection2 findings

The licence and access conditions attached to reference data, and the privacy, safety, suppression and retention constraints that limit its publication.

licensing-and-access

Licence, redistribution and access conditions

The licence governing use, redistribution and derivation, licence encumbrance carried in from individual components, the effect of a statutory duty to publish, and the obligations that follow derived geocodes.

Questions
  1. Under what licence may this dataset be used, redistributed and built upon, and does the licence differ by component?access
    Expected answer
    • Licence reference and version
    • Permitted uses
    • Component-specific variations
  2. Which components are encumbered by a third-party licence that blocks open publication of the merged whole?ownership
    Expected answer
    • Encumbered component list
    • Encumbering licence
    • Separation or removal options
  3. Does a statutory duty to publish spatial data override or coexist with a commercial licence here?authority
    Expected answer
    • Statutory obligation reference
    • Interaction with the licence
    • Resolution adopted
  4. What attribution, share-alike or field-of-use restriction attaches to geocodes derived from this data?constraint
    Expected answer
    • Attribution text required
    • Share-alike scope
    • Field-of-use limits
Artifacts
  • Licence or data use agreementThe instrument that grants and limits use of the reference dataset, including attribution, redistribution, field-of-use and term.
privacy-safety-and-suppression

Privacy, safety, suppression and retention

When a location reference becomes personal data, which records are suppressed or coarsened for safety and by whose decision, how long records and matching logs are kept, what is deleted versus tombstoned, and how authorised responders still reach a suppressed record.

Questions
  1. At what point does this location reference become personal data, and which linkage causes that?privacy
    Expected answer
    • Linkage that identifies a person
    • Resulting classification
    • Controlling legal basis
  2. Which records are suppressed or coarsened for safety, by whose decision, and for how long?security
    Expected answer
    • Sensitivity class
    • Suppression decision reference and decider
    • Review or expiry date
  3. What precision reduction applies when publishing a sensitive position, and is the reduction reversible from published data?access
    Expected answer
    • Coarsening rule and resulting resolution
    • Irreversibility test result
    • Re-identification risk assessment
  4. How long are retired addresses, assignment records and matching logs retained, and what is hard-deleted versus tombstoned?retention
    Expected answer
    • Retention period per record class
    • Deletion mode
    • Legal or archival basis
  5. What lawful-access route allows emergency services or another authorised party to reach a suppressed record?exception
    Expected answer
    • Authorised parties
    • Access route and authentication
    • Audit obligation for each access
Artifacts
  • Suppression or sensitivity decision recordThe decision that classifies a location reference as sensitive and sets the publication constraint, its reviewer, review date and the lawful-access route retained for authorised parties.
interoperabilityCrosswalks, conformance and projections1 findings

Declared mappings to external address models, the evidence behind any conformance claim, and the encoding projections that expose the canonical record.

crosswalks-conformance-and-encodings

Crosswalks, conformance evidence and encoding projections

The external models this register is mapped to and where those mappings lose information, the evidence supporting any conformance claim, the published encoding projections and their derivation from one canonical record, and the handling of components with no target in a receiving model.

Questions
  1. To which external address or location models is this register crosswalked, at which versions, and where is each mapping lossy?interoperability
    Expected answer
    • Target model and version
    • Element-to-element mapping
    • Lossy or unmapped elements
  2. What evidence supports each claimed conformance class, and was a conformance test actually executed?evidence
    Expected answer
    • Conformance class claimed
    • Test executed and its result
    • Evidence artifact reference
  3. Which encoding projections are published, and are they all derived from a single canonical record?interoperability
    Expected answer
    • Projection list and formats
    • Canonical record reference
    • Derivation pipeline and its version
  4. Which fields does each projection drop or default, and is that projection therefore non-authoritative?constraint
    Expected answer
    • Dropped or defaulted field list
    • Authoritative-versus-derived flag
    • Consumer warning
  5. How is a component with no target in the receiving model conveyed without silent loss?exception
    Expected answer
    • Extension or annotation mechanism
    • Loss disclosure
    • Agreement with the receiving party
Artifacts
  • Crosswalk table and conformance evidence packThe maintained element-level mapping between this register and an external model, paired with the executed conformance test results that justify any conformance claim.

Publication holds

  • Source verification, FGDC and NENA: the base's direct HTTPS fetches of FGDC-STD-016-2011 Part 2 and NENA-STA-004.2-2024 returned HTTP 403, so element names, address class values, anomaly status values and lifecycle status values attributed to those sources came from a search index rather than the published documents. Re-verify verbatim before publication and mark any element-level claim provisional until then.
  • Source verification, paywalled ISO standards: neither provider read the normative clause text, full UML or conformance test specifications of ISO 19160-1, 19160-2, 19160-3, 19160-4, 19112 or 19111. The imported ISO 19160-3 quality element list rests on public scope and abstract text. No conformance class may be claimed for any of these standards; all are to be published as alignments only.
  • Standard lineage unverified: the providers disagree on the UPU S42 to ISO 19160-4 relationship. Grok attributes ISO 19160-4 to ISO/TC 211 together with UPU S42 Version 8, while the base records that the UPU's own addressing page states no such relationship and treats the two as aligned but distinct. Publish no equivalence or derivation claim until a first-party UPU or ISO statement is read.
  • Live-version pinning: the two providers cite the same standards through different URL families (iso.org versus committee.iso.org), different EUR-Lex consolidations (2014-12-31 versus 2023-11-19), and different Open Location Code artefacts (a pinned raw specification file versus a living repository). Resolve to one live-checked canonical URL and explicit version pin per source before publication.
  • Multi-profile validation incomplete: the model has been validated only against ISO, EU/INSPIRE, US (FGDC, NENA, USPS) and UPU profiles. Component, locator and numbering vocabularies are unvalidated for East Asian block-and-lot systems (Japan chome-banchi, Korea dual jibun and road-name), South Asian, Middle Eastern and African conventions, and for settings with no assigned civic addresses at all. Hold publication of any universality statement until at least one non-Western national profile has been run through the model.
  • Privacy, suppression and retention remain a structural placeholder: ISO 19160-4 explicitly excludes data protection specification and no consulted source normatively defines suppression thresholds, coarsening rules, re-identification limits or retention periods. The relevant findings provide fields, roles and policy hooks only, and must be published as requiring jurisdiction-specific legal grounding rather than as canonical guidance.

Deferred research

  • Retrieve ISO 19160-2:2023 and ISO 19160-5 and re-check the assignment, maintenance and rendering findings against normative text, specifically reassignment of an address to a different object and whether physical address-sign installation belongs in the addressing process or is fully delegated to a sibling model.
  • Retrieve ISO 19157 and ISO 19115 to ground the quality measure vocabulary and dataset metadata behind the imported ISO 19160-3 finding, and ISO 19148 to decide whether linear reference locations along addressing features warrant a finding in the spatial-referencing bundle or stay excluded with the transport network.
  • Research non-Western addressing cultures — Japan chome-banchi, Korea dual jibun and road-name, South Asian, Gulf and African conventions — and confirm whether the component, locator and sub-address vocabularies survive them or need profile-specific extension.
  • Research national register profiles (UK UPRN and AddressBase, Australia G-NAF, Netherlands BAG, France BAN, AS/NZS 4819) to test the identity, uniqueness-scope and lifecycle rules against operating master registers rather than standards alone.
  • Research grid and geographic identifier families beyond Open Location Code — H3, S2, MGRS, GARS, Maidenhead, Geohash — and settle the treatment of proprietary three-word schemes that lack an open first-party specification.
  • Research retention, erasure and lawful-access law per jurisdiction to replace the placeholder retention periods and suppression rules, including how a legal erasure right interacts with the retire-and-retain default for historic addresses.
  • Research address matching and geocoding algorithm families and any certification regimes for address standardisation software, which neither provider examined beyond the existence of national postal guidance.