kubernetes/vendor/github.com/globalsign/mgo/bson/README.md

An Implementation of BSON for Go

Package bson is an implementation of the BSON specification for Go.

While the BSON package implements the BSON spec as faithfully as possible, there is some MongoDB specific behaviour (such as map keys $in, $all, etc) in the bson package. The priority is for backwards compatibility for the mgo driver, though fixes for obviously buggy behaviour is welcome (and features, etc behind feature flags).