I think the feature in question is declared in the source code here [1]. The RFC goes into some detail about what this means [2] and how it's used [3]. I'd love

I think the feature in question is declared in the source code here [1]. The RFC goes into some detail about what this means [2] and how it's used [3]. I'd love a whitepaper but the RFC is fairly descriptive and is the best source I can find. [1] https://github.com/google/brotli/blob/master/dec/context.h https://github.com/google/brotli/blob/master/dec/context.h [2] https://tools.ietf.org/html/rfc7932#section-2 https://tools.ietf.org/html/rfc7932#section-2 [3] https://tools.ietf.org/html/rfc7932#section-7 https://tools.ietf.org/html/rfc7932#section-7