# The dimensions > The ontological dimensions are what can be observed about a subject, and each is listed with the test surfaces that observe it. Page: Ontology ยท Reasoning Canonical: https://banes-lab.com/ontology/reasoning#the-dimensions The ontological dimensions are what can be observed about a subject, and each is listed with the test surfaces that observe it. ### identity - Nature: object Details Question What exists? Surfaces [data-correctness](https://banes-lab.com/records/reason/test-surface-data-correctness.md) ### composition - Nature: elements Details Question What is it made of? Surfaces [memory-correctness](https://banes-lab.com/records/reason/test-surface-memory-correctness.md), [resource-correctness](https://banes-lab.com/records/reason/test-surface-resource-correctness.md) ### structure - Nature: arrangement Details Question How are parts arranged? Surfaces [interface-correctness](https://banes-lab.com/records/reason/test-surface-interface-correctness.md) ### relation - Nature: mapping Details Question What connects it to other things? Surfaces [interaction-correctness](https://banes-lab.com/records/reason/test-surface-interaction-correctness.md), [consistency-correctness](https://banes-lab.com/records/reason/test-surface-consistency-correctness.md), [protocol-correctness](https://banes-lab.com/records/reason/test-surface-protocol-correctness.md) ### space - Nature: geometry Details Question Where is it? ### time - Nature: process Details Question When does it occur? Surfaces [temporal-correctness](https://banes-lab.com/records/reason/test-surface-temporal-correctness.md) ### state - Nature: condition Details Question What condition is it in? Surfaces [state-correctness](https://banes-lab.com/records/reason/test-surface-state-correctness.md), [configuration-correctness](https://banes-lab.com/records/reason/test-surface-configuration-correctness.md) ### change - Nature: operation Details Question How does it transform? ### behaviour - Nature: dynamics Details Question What does it do? Surfaces [concurrency-correctness](https://banes-lab.com/records/reason/test-surface-concurrency-correctness.md) ### function - Nature: mapping Details Question What role does it fulfil? Surfaces [functional-correctness](https://banes-lab.com/records/reason/test-surface-functional-correctness.md) ### cause - Nature: mechanism Details Question Why does it happen? Surfaces [security-correctness](https://banes-lab.com/records/reason/test-surface-security-correctness.md) ### meaning - Nature: semantics Details Question What does it signify? Surfaces [semantic-correctness](https://banes-lab.com/records/reason/test-surface-semantic-correctness.md), [observability-correctness](https://banes-lab.com/records/reason/test-surface-observability-correctness.md) ### scale - Nature: hierarchy Details Question At what level does it exist? Surfaces [performance-correctness](https://banes-lab.com/records/reason/test-surface-performance-correctness.md), [numerical-correctness](https://banes-lab.com/records/reason/test-surface-numerical-correctness.md) ### probability - Nature: distribution Details Question How certain is it? Surfaces [reliability-correctness](https://banes-lab.com/records/reason/test-surface-reliability-correctness.md), [availability-correctness](https://banes-lab.com/records/reason/test-surface-availability-correctness.md) ### novelty - Nature: creation Details Question What deviates from expectation? Surfaces [determinism-correctness](https://banes-lab.com/records/reason/test-surface-determinism-correctness.md) ## Links to - [Data Correctness](https://banes-lab.com/records/reason/test-surface-data-correctness.md) - [Memory Correctness](https://banes-lab.com/records/reason/test-surface-memory-correctness.md) - [Resource Correctness](https://banes-lab.com/records/reason/test-surface-resource-correctness.md) - [Interface Correctness](https://banes-lab.com/records/reason/test-surface-interface-correctness.md) - [Interaction Correctness](https://banes-lab.com/records/reason/test-surface-interaction-correctness.md) - [Consistency Correctness](https://banes-lab.com/records/reason/test-surface-consistency-correctness.md) - [Protocol Correctness](https://banes-lab.com/records/reason/test-surface-protocol-correctness.md) - [Temporal Correctness](https://banes-lab.com/records/reason/test-surface-temporal-correctness.md) - [State Correctness](https://banes-lab.com/records/reason/test-surface-state-correctness.md) - [Configuration Correctness](https://banes-lab.com/records/reason/test-surface-configuration-correctness.md) - [Concurrency Correctness](https://banes-lab.com/records/reason/test-surface-concurrency-correctness.md) - [Functional Correctness](https://banes-lab.com/records/reason/test-surface-functional-correctness.md) - [Security Correctness](https://banes-lab.com/records/reason/test-surface-security-correctness.md) - [Semantic Correctness](https://banes-lab.com/records/reason/test-surface-semantic-correctness.md) - [Observability Correctness](https://banes-lab.com/records/reason/test-surface-observability-correctness.md) - [Performance Correctness](https://banes-lab.com/records/reason/test-surface-performance-correctness.md) - [Numerical Correctness](https://banes-lab.com/records/reason/test-surface-numerical-correctness.md) - [Reliability Correctness](https://banes-lab.com/records/reason/test-surface-reliability-correctness.md) - [Availability Correctness](https://banes-lab.com/records/reason/test-surface-availability-correctness.md) - [Determinism Correctness](https://banes-lab.com/records/reason/test-surface-determinism-correctness.md) ## Linked from - [What can drift, seen through how it drifts](https://banes-lab.com/software-architecture/coverage/what-can-drift-seen-through-how-it-drifts.md)