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YAML at a glance
YAML
The modern YAML name is commonly expanded as 'YAML Ain't Markup Language', reflecting a deliberate move away from treating it as a document markup format.
Open Package Format at a glance
Open Package Format
OPF began in the Open eBook era, evolved through IDPF EPUB specifications such as OPF 2.0.1, and is now carried forward by the W3C EPUB package-document model.
Format comparison
| Feature | YAML | Open Package Format |
|---|---|---|
| File type | Other | Other |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | depends |
| File size characteristics | depends | depends |
| Compatibility | moderate | moderate |
| Editability | moderate | moderate |
| Created year | 2001 | 1999 |
| Inventor | Clark Evans, Ingy döt Net, Oren Ben-Kiki | International Digital Publishing Forum (IDPF) |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | moderate | moderate |
| Delivery profile | moderate | moderate |
| Workflow fit | exchange | exchange |
| Vector scaling | Not supported | Not supported |
| Reflowable text | Not supported | Supported |
| Structured data | Supported | Supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use YAML
- system exchange
- automation
- specialized interoperability
- Readable for humans when files are kept disciplined.
When to use Open Package Format
- system exchange
- automation
- specialized interoperability
- Centralizes metadata, manifest, and spine information for an EPUB publication.
FAQs
Why convert YAML to Open Package Format?
Choose Open Package Format as target when ePUB ebook package authoring, ebook metadata management, and ebook production pipelines that generate or process EPUB package documents.
What changes when converting YAML to Open Package Format?
EPUB ebook package authoring, ebook metadata management, and ebook production pipelines that generate or process EPUB package documents.
What should I review after converting YAML to Open Package Format?
After conversion, review these destination checks: Open converted output in EPUB authoring tools and verify behavior on real samples; Compare output against the expected depends quality profile; Useful only inside an ebook packaging workflow rather than as a general-purpose XML container.
How can I keep quality stable in YAML to Open Package Format conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Compatibility details vary across EPUB 2, EPUB 3, and legacy-reading-system expectations; Useful only inside an ebook packaging workflow rather than as a general-purpose XML container; Validate destination compatibility before large-batch conversion.