Knowledge · Rule
Missing EPUB 3 navigation document
Package Structure · A-NAV
Definition
Apple Books requires an EPUB 3 Navigation Document (nav) declared in the package manifest.
Why
- Package built for Kindle EPUB 2 workflows without Apple Books EPUB 3 requirements.
- Exporter omitted Apple-required metadata or navigation.
Impact
Platform impact varies — see matrix below.
Platforms
Engine applicability · apple
| Platform | Result |
|---|---|
| KDP | Unknown |
| Apple Books | May reject |
| Google Play | Unknown |
| Kobo | Unknown |
References
- Apple Books Asset Guide
- Cermify Apple RID v1 — engineering/apple-rid-v1.md
Last updated · 2026-08-04
Why we believe
Provenance is loaded from RID (same source as Rule Radar) — not a second copy.