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| Name | CBR | FB2 |
| Full name | Comic Book RARE File | FB2 - FictionBook |
| File extension | .cbr | .fb2, .fb2.zip |
| MIME type | application/x-cbr | |
| Developed by | Various | Dmitry Gribov |
| Type of format | eBook File | e-book file format |
| Description | A .cbr file is a compressed file that allows a set of comic book images to be stored. These images can be ordered and the format in which they are displayed can be altered to allow two images to be viewed side by side, in the same way as a double page spread would occur. | FictionBook is an open XML-based e-book format which originated and gained popularity in Russia. FictionBook files have the .fb2 filename extension. The FictionBook format does not specify the appearance of a document; instead, it describes its structure. For example, there are special tags for epigraphs, verses and quotations. |
| Technical details | A .cbr file is actually just a .rar file with an amended file extension. What makes a .cbr file different is that it can be opened directly by comic book viewer applications without a requirement to decompress it first. The user can also associate the file extension with a Comic Book Viewer application. Typical image formats are allowed for a .cbr file such as JPEG, GIFF, TIFF and PNG. | In contrast to other eBook formats (e.g. ePub), a FictionBook document consists of a single XML file. Images are converted to Base64 and reside inside the <binary> tag, so the size of the embedded images is increased by approximately 37%. FictionBook files are often distributed inside Zip archives. |
| Associated programs | CDisplay, ComicFlow, Perfect Viewer | FBReader, AlReader, Haali Reader, STDU Viewer, CoolReader, Okular, Ectaco jetBooks. |
| Wiki | http://en.wikipedia.org/wiki/Comic_book_archive | https://en.wikipedia.org/wiki/FictionBook |