.OPF

FlipViewer FlipBook File

📌 An .OPF resource category relies on the FlipBook specification schema generated and composed by E-Book Systems FlipViewer. In short, the extension includes XML-formatted data which organizes and defines a FlipBook’s relevant content. FlipBook stands out as an ultimate content publishing and viewing project which permits users to initialize and store digital catalogs, magazines, and other proper forms of electronic periodicals and issues. The package is exploited to store this electronic content in the .OPF format, abbreviated from the OEB Package Format. The imported graphical and visual resources are also integrated into the outcome .OPF source.

FlipAlbum File

📌 The actual .OPF tech specification is associated with digital photo albums, generated by FlipAlbum, an out-of-date software package which organizes and groups individual images into picture albums. Therefore, the .OPF data instance stores the resulting references to image files, appearance settings, and album structure in discrete file objects and entities. At last, the .OPF entries can be reviewed with corresponding 3D effects, typical of 3D page-flipping. FlipAlbum photo albums are ordinarily exploited for opening, sharing and transferring desired photo-shots and compositions to family and friends. The structure of .OPF extension instances severely resembles the .XML specification.

Open Packaging Format File

📌 This corresponding .OPF data entry relies on the distinct file specification formatted in strict accordance with the Open Packaging Format technology, currently remaining as an integral part of the EPUB regulation. Precisely, the noted .OPF tech schema stores proper eBook info markers and tags, such as display formatting of the book, its reading order, creator, book ID, language, title, and so on. Besides, the .OPF mechanism serves as a structural part of the .EPUB archive designated for specifying and defining corresponding eBook metadata. It should be explicitly mentioned that .OPF files are usually stored, handled and reviewed as accustomed .XML data sources.

How to open an .OPF file?

📌 .OPF entities can be smoothly opened up and explored by various eBook system and software projects, whose further development and maintenance is currently discontinued and ceased. Regarding the Open Packaging Format specification, the noted .OPF metadata can be seamlessly processed and handled by Calibre package (for converting and cross-platform transferring of the ebook through messenger or cloud storage), as well as to be read via FBReader utility on any compliant device or mobile gadget, configured beforehand. As long as the layout of the .OPF instances reminds of .XML logic, you can review the tags and fields of the resulting .OPF entry through an accustomed XML-reader or word processing suite.