EDI

Some of these pages are provided by companies promoting their own EDI services or software, but contain some good information.
http://www.gs1.se/eancom%202000/index.htm http://www.gs1.se/EANCOM_2002/ean02s4/experts/index.htm

EANCOM. In trade EANCOM is the most used edifact standard. Guides are much better than the edifact general documentation.

UN/EDIFACT reference
The official source of edifact (the one and only). All other information is derived from this.

Stylus Studio EDIFACTreference
I have found this page very useful as my main EDIFACT reference. All the versions are there back to D93A and everything is hyperlinked.

Liason EDI Notepad
EDI editor/validator )free) for Windows platform. It provides rendering of EDI/EDIFACT/TRADACOMS/X12.

Please note that the official X12 documentation is not free and should be purchased.

Python

You don't need to know a lot about Python to get started with bots, but it will help you to do more advanced mapping and user scripts (or even add new features to bots code!)

Beginners Guide
New to programming? Python is free and easy to learn if you know where to start! This guide will help you to get started quickly.

Simple Programs
Gives around 30 simple working code samples, gradually introducing more advanced concepts.

Google's Python Class
This is a free class for people with a little bit of programming experience who want to learn Python. The class includes written materials, lecture videos, and lots of code exercises to practice Python coding.

String Methods
These are often used to manipulate string data in mapping scripts.