LEFT / Structure
COMPARE SPACE / APU017
Difference without a winner.
Compare two built-world records while preserving missing evidence, semantic measurement types, date precision, Graph provenance, and Atlas privacy.
Synthetic development comparison. It demonstrates evidence handling and must not be published.
Representative evidence pair
RIGHT / Infrastructure
Fixture Harbor Footbridge
Comparison basis: Contrasts with · apu:rel:tower-bridge-contrast · apu:source:apu001-fixture-spec
EVIDENCE MATRIX
Side-by-side record
Scroll horizontally on narrow screens. The table remains the semantic accessible representation.
| Field | Fixture Observation Tower | Fixture Harbor Footbridge | Interpretation rule |
|---|---|---|---|
| Entity kindDifferent | StructureSources: apu:source:apu001-fixture-spec | InfrastructureSources: apu:source:apu001-fixture-spec | Different kinds are descriptive, not a ranking. |
| Lifecycle stateSame | ExtantSources: apu:source:apu001-fixture-spec | ExtantSources: apu:source:apu001-fixture-spec | Lifecycle state is shown as recorded; it does not imply condition or value. |
| Geographic contextShared Context | Fixture Coastal Region › Fixture Harbor City › Fixture Civic District › Fixture Civic Square › Fixture Observation TowerSources: apu:source:apu001-fixture-spec | Fixture Coastal Region › Fixture Harbor City › Fixture Harbor FootbridgeSources: apu:source:apu001-fixture-spec | Shared hierarchy context: Fixture Coastal Region › Fixture Harbor City. No coordinates are included. |
| Completion chronologyDifferent | 1964 (fixture)Precision: yearSources: apu:source:apu001-fixture-spec | c. 1972 (fixture)Precision: approximateSources: apu:source:apu001-fixture-spec | Date displays and precision are preserved exactly; no midpoint or precision upgrade is calculated.Evidence: apu:timeline:fixture-observation-tower-completed-01, apu:timeline:fixture-footbridge-completion |
| Style / movementUnknown | Fixture Ribbed ModernismSources: apu:source:apu001-fixture-spec | Unknown / not evidenced | Only explicit Graph relationships are shown.Evidence: apu:rel:tower-style-ribbed |
| TypologyUnknown | Fixture Observation Tower TypologySources: apu:source:apu001-fixture-spec | Unknown / not evidenced | Only explicit Graph relationships are shown.Evidence: apu:rel:tower-typology |
| MaterialUnknown | Fixture Blue BrickSources: apu:source:apu001-fixture-spec | Unknown / not evidenced | Only explicit Graph relationships are shown.Evidence: apu:rel:tower-material |
| HeightUnknown | 84.5 m — HeightSources: apu:source:apu001-fixture-measurements | Unknown / not evidenced | One or both sides lack this measurement. |
| SpanUnknown | Unknown / not evidenced | 142 m — SpanSources: apu:source:apu001-fixture-measurements | One or both sides lack this measurement. |
| Same unit ≠ same quantityIncompatible | 84.5 m — HeightSources: apu:source:apu001-fixture-measurements | 142 m — SpanSources: apu:source:apu001-fixture-measurements | Both values may use m, but Height and Span are different quantities. |
| Structure-dossier anatomyNot Applicable | Structure-specific anatomy model appliesSources: apu:source:apu001-fixture-spec | Not applicable to this entity type | This is a schema-applicability distinction, not an architectural quality judgment. |
| Explicit pair relationshipShared Context | Contrasts withSources: apu:source:apu001-fixture-spec | Contrasts withSources: apu:source:apu001-fixture-spec | Graph assertion apu:rel:tower-bridge-contrast supplies the comparison basis.Evidence: apu:rel:tower-bridge-contrast |
What the statuses mean
- Different
- Evidence differs. This is descriptive, never a quality judgment.
- Unknown
- Current APU evidence is missing on one or both sides. Unknown is not zero or false.
- Not applicable
- The field belongs to a schema that does not apply to that entity type.
- Incompatible
- Values look numerically similar but their semantic quantity or unit cannot be compared safely.
- Shared context
- Both records participate in an explicit common relationship or hierarchy context.
Future ICU binding
ICU global search may later provide entity selection; ICU Save/account may persist a user’s chosen comparison; ICU analytics may record compare opens and selections. This portable preview creates none of those parent systems and generates no public pair URLs.