http://tcllib.sourceforge.net/doc/asn.html ---- "Abstract Syntax Notation" in ITU-T X.680 [http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf]; also note related language specifications [http://www.itu.int/ITU-T/studygroups/com17/languages/]. These are all reference materials, largely opaque to humans; we need to mention here also such tutorials as Milan and Dubuisson's [http://asn1.elibel.tm.fr/en/tools/tutorial/]. [[...]]