Open eBook

Open eBook (OEB), or formally, the Open eBook Publication Structure (OEBPS), is a legacy e-book format which has been superseded by the EPUB format.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 full version 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).

• September 2007 – Open Publication Structure (OPS) 2.0, EPUB. Released, supersedes the OEBPS 1.2
• August 2002 – OEBPS 1.2 Recommended Specification Released
• June 2001 – OEBPS 1.0.1 replaces OEBPS 1.0
• September 1999 – Open eBook Publication Structure (OEBPS) 1.0 released

• SoftBook
• Adobe Digital Editions
• FBReader – GPL e-book reader for Unix/Windows computers.
• Lexcycle Stanza
• Mobipocket
• Openberg Lector – cross-platform reader released under the GPL and based on Mozilla platform

• SoftBook
• Sony Reader – As of 2008^[update] the Sony Reader PRS-505 supports the EPUB file format.
• Intel Reader
• Barnes & Noble Nook
• Kobo eReader

• Comparison of e-book formats
• Open Packaging Conventions

• Open eBook Forum
• Openberg
• Open Publication Structure (OPS) 2.0
• Adobe's Sample eBook Library
• Article "EPUB" at the MobileRead Wiki
• ePub Validator - This utility allows to validate the epub file to ePub standards of 1.0.5
• https://github.com/idpf/epubcheck
• EPUB Validator (beta)