By our (long) experience, many designers code without using any Coding Guide.
From the smallest one-man operation to the largest multi-national company, this is never a good thing.
However, we have also seen some totally counter-productive Coding Guides ! (usually in large companies).
This was the motivation in creating this document in 2004. Surprisingly, this Guide has remained extremely stable, it has been unsed with permission in a lot of companies throughout the world, and the 2018 edition is very close to the original version, which is an indication of its quality !