ASN.1 reading material

Is there any place where i could get some materials to know about ASN.1. I want to know about the syntax's to be used and also some examples to get some overview.

Any help is appreciated.

There are a few more or less free documents on ASN.1.

A good short intro is A Layman's Guide to a Subset of ASN.1, BER, and DER, especially if you need it in the context of X.509 or similar stuff.

Another good resource would be the book from Olivier Dubuisson which can be downloaded after a free of charge registration from: ASN.1 Reference Book , another book there is from John Larmouth ASN.1 Complete, might also be worth a look.

You can also go in depth with the appropriate standards documents from the ISO, but those tend to be rather cryptic, you can find all the references at wikipedia http://en.wikipedia.org/wiki/Abstract_Syntax_Notation_One#References

I have found the ASN1C documentation and examples to be very useful in the past.

the official standards are called X.680 and X.690

It would be good to start at A Layman's Guide to a Subset of ASN.1 but if you have some konwledge on asn1 syntax then for practice or understanding you can make some sample on http://asn1-playground.oss.com/

This online tool help me a lot. Thanks.