Introduction

There are patterns that have been observed in Johnny.Decimal systems after a decade of public use.

Some are standard and fit in the as-documented Johnny.Decimal structure.

Some are non-standard and require a modified numbering scheme.

This website section will explore and document these patterns, and provide downloadable templates where appropriate.

Check the forum

Note that there are recurring themes, and that you would be wise to search the forum for your topic of interest.

For example, genealogy has been well covered.