What is Unicode character property?

The Unicode Standard assigns various properties to each Unicode character and code point.

The properties can be used to handle characters in processes, like in line-breaking, script direction right-to-left or applying controls. Some "character properties" are also defined for code points that have no character assigned and code points that are labeled like "". The character properties are described in Standard Annex #44.

Properties have levels of forcefulness: normative, informative, contributory, or provisional. For simplicity of specification, a character property can be assigned by specifying a continuous range of code points that have the same property.