[dim13]

Grandfather of Protobuf is ASN.1

[foobiekr]

Very much so. Pretty much all of these protocols are simplifications of asn1 and in some cases (like protobuf) there are a handful of things that got lost because the wire formats didn’t have them as they didn’t need them. A schema indicator being the single biggest flaw in protobuf.

[orf]

Why is the lack of a schema indicator the biggest flaw of protobuf?

[TeMPOraL]

One usually has two grandfathers, so it still works out.

[userbinator]

The telco industry, including GSM and its successors, uses ASN.1 widely.