| Filename extension | .opf |
|---|---|
| Internet media type | application/oebps-package+xml[1] |
| Developed by | Open eBook Forum |
| Initial release | 1999 |
| Latest release | Open eBook Publication Structure (OEBPS) 1.2 / August 2002 |
| Type of format | e-Book file format |
| Contained by | OEB Package Format (ZIP) |
| Extended from | XML, defined subset of XHTML, CSS, Dublin Core |
| Extended to | EPUB electronic publication standard |
| Website | Open eBook Forum |
Open eBook (or OEB), or formally, the Open eBook Publication Structure (OEBPS), is a legacy e-book format "based primarily on technology developed by SoftBook Press"[2] and on XML; it has been superseded by the EPUB electronic publication standard.
Open eBook is a ZIP file plus a Manifest file. Inside the package a defined subset of XHTML may be used, along with CSS and Dublin Core metadata. The default file extension is .opf (OEB Package Format).
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