The format consists of chunks of data each called an Ogg Page. Each page begins with the "OggS" string which can be used to identify the file as Ogg.
主要由許多"page"組成，每個page都以"Oggs"字串為首以利辨認。
A serial number and page number in the page header identifies each page as part of a series of pages which make up a bitstream. Multiple bitstreams may be muxed in the file where pages from each bitstream ordered by the seek time of the contained data. Bitstreams may also be appended to existing files, a process known as chaining, to cause the bitstreams to be decoded in sequence.
Page的header裡包括serial number及page number，說明page本身是屬於某個bitstream。一個ogg檔案包含許多bitstream，bitstream裡的每個page是依seek time來當做排序的根據。