Core Documentation
This would be the core set of documents we need to be strongly positioned. Of course we can start with a lot less, but I’d say we do need a target to aspire to, and this list seems to be a very worthy target:

General Documents
(XR-001) What is XOOPS
(XR-002) A brief history of XOOPS
(XR-003) The XOOPS Universe
(XL-001) The XOOPS GNU/GPL License
(XL-002) Terms and conditions of use
(XL-003) XOOPS Privacy Statement
(XL-004) The XOOPS Foundation Charter
(XR-005) XOOPS Contributors

Documents for developers and power users
NOTICE: For this particular area this is a proposal to the developers. The more technical documents would be under the devs’ direct control, as asked by the devs themselves. This is an area I don’t know much about, so this is mainly a kind of wish list. Please be aware that these lists include both long and short documents. Some of the documents proposed here are only a few paragraphs long, while others are booklets or complete handbooks.

Roadmaps
(XD-001) XOOPS Core Development Roadmap
(XD-002) XOOPS Modules Roadmap
(XD-003) XOOPS Themes Roadmap
(XD-004) XOOPS Quality Control Roadmap
(XD-005) XOOPS Support Roadmap
(XD-006) XOOPS Documentation Roadmap
(XD-007) XOOPS Community Relations Roadmap
(XD-008) XOOPS Product Development Roadmap

Technical documents
(XD-101) XOOPS Core Functions
(XD-102) XOOPS Base Documents - phpDocs
(XD-103) XOOPS Base Documents - phpXRef
(XD-104) XOOPS API
(XD-104) XOOPS Javascript Functions

Standards
(XD-201) XOOPS Coding Standars
(XD-202) XOOPS File Headers
(XD-203) XOOPS Theme Documentation
(XD-204) XOOPS Theme Certification
(XD-205) XOOPS Module Documentation
(XD-206) XOOPS Module Certification

Documents for general users

Installation and usage
(XU-001) XOOPS Requirements
(XU-002) XOOPS Installation Guide
(XU-003) XOOPS Operations Guide
(XU-004) Troubleshooting XOOPS

Development at user level
(XU-101) XOOPS Module Development Guide
(XU-102) XOOPS Theme Development Guide
(XU-103) XOOPS CVS Access Guide
(XU-104) XOOPS SVN Access Guide

Assorted subjects
(XU-201) The XOOPS Module Registry
(XU-202) The XOOPS Theme Registry
(XU-203) XOOPS Hacks
(XU-204) An introduction to XOOPS and Smarty
(XU-205) The XOOPS Glossary
(XU-206) Best of XOOPS' Forums
(XU-207) An assortment of XOOPS FAQs
(XU-208) Favorite Code Snippets

Documents for new users

Visual introductions
(XN-001) A visual introduction to XOOPS
(XN-002) A XOOPS' Webmaster Basic Manual

Anatomy Series
(XN-101) Anatomy of a XOOPS Site
(XN-102) Anatomy of a Module
(XN-103) Anatomy of a Theme
(XN-104) Anatomy of a theme.html file
(XN-105) Anatomy of a style.css file

How do I... Series
(XN-201) How do I... install XOOPS
(XN-202) How do I... customize a site using XOOPS
(XN-203) How do I... manage modules
(XN-204) How do I... manage blocks
(XN-205) How do I... manage users
(XN-206) How do I... manage content
(XN-207) How do I... manage themes
(XN-208) How do I... manage images
(XN-209) How do I... create multilingual sites