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AsciiDoc at a glance
AsciiDoc
AsciiDoc began with Stuart Rackham's early-2000s toolchain and later gained broader ecosystem momentum through Asciidoctor and the ongoing Eclipse-led specification effort.
ERF at a glance
ERF
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 | AsciiDoc | ERF |
|---|---|---|
| File type | Document | Image |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | raw |
| File size characteristics | medium | large |
| Compatibility | broad | limited |
| Editability | moderate | high |
| Created year | 2002 | 2004 |
| Inventor | Stuart Rackham | Epson |
| Status | active | proprietary |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | strong | strong |
| Metadata handling | moderate | rich |
| Delivery profile | strong | limited |
| Workflow fit | exchange | source |
| Vector scaling | Not supported | Not supported |
When to use each format
When to use AsciiDoc
- authoring
- review and collaboration
- distribution
- Balances source readability with richer semantics than basic Markdown variants.
When to use ERF
- capture ingest
- editing
- web or print delivery
- Preserve capture-stage image data for later interpretation.
FAQs
Why convert AsciiDoc to ERF?
Choose ERF as target when preserving or restoring Epson-origin raw captures in an archive or compatibility workflow.
What changes when converting AsciiDoc to ERF?
Convert to ERF when preserving or restoring Epson-origin raw captures in an archive or compatibility workflow. In most contemporary pipelines, it is a legacy source format to retain or migrate.
What should I review after converting AsciiDoc to ERF?
After conversion, review these destination checks: Open converted output in LibRaw and verify behavior on real samples; Compare output against the expected raw quality profile; Many are vendor-specific and poorly documented publicly.
How can I keep quality stable in AsciiDoc to ERF conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Compatibility often depends on decoder support in tools such as LibRaw, Adobe Camera Raw, or vendor software; Many are vendor-specific and poorly documented publicly; Validate destination compatibility before large-batch conversion.