# Ordered Read Model

> The requirement that data be read in a fixed forward order rather than by arbitrary index.

Record: `lexicon:ordered-read-model`
Kind: constraint
Layer: [Execution Core](https://banes-lab.com/records/layer/execution-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-ordered-read-model

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Lookup Performance](https://banes-lab.com/records/lexicon/lookup-performance.md) and before [Random Access Requirement](https://banes-lab.com/records/lexicon/random-access-requirement.md).

## Category

- [Streaming / Pipeline / Dataflow Processing](https://banes-lab.com/records/lexicon-category/streaming-pipeline-dataflow-processing.md)

## Required by

- [Sequential Access](https://banes-lab.com/records/architecture/sequential-access.md)

## Linked from

- [Streaming / Pipeline / Dataflow Processing](https://banes-lab.com/ontology/principles/architecture-category-streaming-pipeline-dataflow-processing.md)