1305 Broad Band eBook LRF Text (Structured) Broad Band eBook (BBeB) is a proprietary e-book format created by Sony and Canon for Sony e-book readers. The LRF variant is a compiled, unencrypted version of an LRS file. Sony discontinued development of BBeB in 2010, in favour of the EPUB format. 1 Digital Preservation Department / The National Archives 01 May 2013 01 May 2013 fmt/518 PUID lrf File extension 811 Broad Band eBook (lrf) BOF: L.R.F… 1 Absolute from BOF 0 0 4C00520046000000