BSON

BSON is a binary serialization format designed to be similar to JSON, only binary-based rather than text-based. It is used in MongoDB.

Multi-byte numeric quantities are little-endian.

Specifications

 * Official spec

Metaformat files

 * Synalysis grammar file (for Hexinator / Synalize It!; more details)

Other links

 * Wikipedia article
 * Info in MongoDB site