For me too, although you only need to use (and implement) the parts which are relevant for your application and not all of them, so it is not really the problem

For me too, although you only need to use (and implement) the parts which are relevant for your application and not all of them, so it is not really the problem. (I also never needed to write ASN.1 schemas, and a full implementation of ASN.1 is not necessary for my purpose.) (This is also a reason I use DER instead of BER, even if canonical form is not required; DER is simpler to handle than all of the possibilities of BER.)