| Open eBook Publication Structure (OEBPS) | |
| Extension: | .opf |
| Mime: | application/oebps-package+xml[1] |
| Owner: | Open eBook Forum |
| Latest Release Version: | Open eBook Publication Structure (OEBPS) 2.0 |
| Genre: | 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 |
Open eBook (OEB), or formally, the Open eBook Publication Structure (OEBPS), is a legacy e-book format which has been superseded by the EPUB format. It was "based primarily on technology developed by SoftBook Press". and on XML. OEB was released with a free version belonging to public domain and a fullversion to be used with or without DRM by the publishing industry.
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).