bcquality/microsoft/knowledge/style/api-page-version-format.md
Jesper Schulz-Wedde 2b5550c346
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Improve partner onboarding and documentation navigation (#174)
Lead with a complete plugin quick start and add task-oriented usage, troubleshooting, customization, and contribution guides. Preserve the broader plugin framing, correct conflicting contract guidance, support Agents folder reviews, and align repository validation. Convert existing sample references to clickable links without changing knowledge rules.

Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
2026-09-09 17:31:03 +02:00

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---
bc-version: [all]
domain: style
keywords: [api-page, apiversion, version, format, beta]
technologies: [al]
countries: [w1]
application-area: [all]
---
# `APIVersion` must follow the pattern `vX.Y` (or `beta`)
## Description
The `APIVersion` property on an API page is part of the public URL path: `/api/<publisher>/<group>/<version>/<entitySetName>`. The platform accepts only two value shapes for it: a `vMAJOR.MINOR` string such as `'v1.0'`, `'v2.0'`, or `'v2.1'`, or the literal string `'beta'` for pre-release endpoints. Anything else — `'v2'`, `'2.0'`, `'1'`, `'v2.0.0'` — is rejected. The major-minor pair lets consumers detect compatibility through URL inspection alone; the explicit `'beta'` channel signals "this contract may break without notice."
## Best Practice
Start a new public endpoint at `'v1.0'`. Bump the minor when adding fields or non-breaking changes; bump the major when changing field types, removing fields, or any breaking change. Use `'beta'` for endpoints that are still iterating and SHOULD NOT be consumed by external integrations.
See sample: [`api-page-version-format.good.al`](api-page-version-format.good.al).
## Anti Pattern
`APIVersion = 'v2'` (missing minor), `APIVersion = '2.0'` (missing `v` prefix), `APIVersion = 'v2.0.0'` (extra segment). All three either fail to compile or produce a URL that consumers cannot reach.
See sample: [`api-page-version-format.bad.al`](api-page-version-format.bad.al).