Open eBook

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Open eBook Publication Structure (OEBPS)
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eBook (or OEB), or formally, the Open eBook Publication Structure (OEBPS), is a legacy e-book format which has been superseded by the EPUB format. It was "based primarily on technology developed by SoftBook Press"[2] and on XML.

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).

Specification release history[edit]

  • 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

Reader software[edit]

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