OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   Re: [xml-dev] ASN.1 is an XML Schema Language (Fix those lists!) andBina

[ Lists Home | Date Index | Thread Index ]

tpassin@comcast.net wrote:
> I think that some of the sophisticated encodings like PER are very hard to get right and complete, too (I have never looked into these encodings, so have no first-hand experience here).

IMHO my guess is that the writing of a PER encoder/decoder (just that 
layer, not the schema-based encoder/decoder that drives it) is harder 
than writing an XML parser, but i do not think by a huge amount (but do 
not hold me too much to this statement!). PER reduces the choice of how 
an encoder may encode data, this makes it alot easier to develop the 
decoder correctly.

There are enough resources out there to make the development process 
easier. Two freely available books have good chapters on PER [1]. There 
are also two open source PER implementations [2]. Of course obtaining 
the ASN.1 PER specification helps! [3]


[1] http://www.oss.com/asn1/booksintro.html.
[2] http://www.erlang.org/doc/r7b/lib/asn1-
[3] http://asn1.elibel.tm.fr/en/standards/index.htm#encoding

| ? + ? = To question
    Paul Sandoz


News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS