I'm trying to learn all about the technical aspects of IOTA but I often find infos saying opposite things.
As an example the "Anatomy of a transaction" pages of the following sites:
In particular the last is the one linked in the official IOTA website but I think an address is 81 trytes long; instead this documentation says that the address is a 27 trytes long String.
I'm also starting to read the Java source code of the IRI (IOTA Reference Implementation) but I can't find any documentation and/or comments to the code.
I'm reading and writing a recap of all the Java classes (otherwise I'll have to read it all over again) but I'd rather avoid doing something already done by others.
Is there an official documentation? Anything official at all?