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EPUB at a glance
EPUB
EPUB grew out of the digital publishing standards ecosystem and later moved under W3C stewardship, reinforcing its identity as an open publishing format rather than a vendor-specific storefront file.
CAP at a glance
CAP
Digital photography fragmented into many manufacturer-specific raw formats because camera makers optimized for their own sensors, metadata, and software ecosystems rather than for one shared public raw standard.
Format comparison
| Feature | EPUB | CAP |
|---|---|---|
| File type | Ebook | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2007 | 2005 |
| Inventor | IDPF / W3C | Phase One |
| Status | active | proprietary |
| Primary use cases |
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|
When to use each format
When to use EPUB
- Your source file is already in EPUB.
- Preserve source expectations before exporting to CAP.
- EPUB is commonly used in ebook workflows.
When to use CAP
- Your target workflow expects CAP.
- Improve delivery compatibility with CAP.
- CAP is commonly used in image workflows.
FAQs
Why convert EPUB to CAP?
Convert to CAP when keeping compatibility with a legacy capture workflow or preserving source material from a proprietary imaging system.
It is mainly useful in archive recovery and controlled migration scenarios.
What changes when converting EPUB to CAP?
This conversion changes how the format behaves in downstream tools and delivery environments.
What should I review after converting EPUB to CAP?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.