The legend that is contained in the file attached to this post is meant to be a framework that You can expand or alter should You so choose and is by no means definitive. You can add Your own symbols or change the existing ones, as well as expand the legend to include new items based on Your own specific design task. You can also alter the colours that are used in the legend if You feel that a different set of colours would be better for presentation purposes.
DWG (AutoCad 2013) version
Spatial Planning and Regional Planning schedule you can find here.