JL’s Web TutorialsASN.1 tagging - a gentle and verbose introduction!

Table of Contents

JL’s Web TutorialsASN.1 tagging - a gentle and verbose introduction!

PPT Slide

A piece of ASN.1 with tags

Types as a bucket of values

Development of encoding concepts (1)

PPT Slide

Development of encoding concepts (2)

PPT Slide

Development of encoding concepts (3)

Development of encoding concepts (4)

BER

Comments on TLV

Those “T” values

Setting the “T” values

PPT Slide

A quick look at PER (Packed Encoding Rules)

PPT Slide

A bit more on changing tags

Why call it “IMPLICIT” tagging”?

Why call it “EXPLICIT” tagging?

PPT Slide

Back to models - tag lists

Graphically:

BER encodings of tagged types

Global structure

PPT Slide

Tag classes

PPT Slide

Tag rules

Tagged types (yes, still a bit more!)

More tagging rules

Module defaults

PPT Slide

The EXAM! Non-CHOICE and CHOICE types

The answers!

When do tags have to be distinct?

PPT Slide

The answers!

The answers, cont.

What about PER?

How to end?

Email: j.larmouth@salford.ac.uk

Other information:
Tutorial on tagging, produced July 2000