Unicode anomaly

The Unicode Standard has imposed for itself strict rules to guarantee stability. This implies that when mistakes against these permanent rules are published, these mistakes can not be corrected. Depending on the grade of strictness of a rule, a change can be prohibited or allowed. For example, a "Name" given to a code point can and will not change. But a "Script" property is more flexible, by Unicode's own rules.

Anomalies

U+2118 ℘ SCRIPT CAPITAL P (&weierp;, &wp;).

The name says "capital", but it is a small letter. The true capital is U+1D4AB 𝒫 MATHEMATICAL SCRIPT CAPITAL P (&Pscr;)

Stability policy

Version 1.0 versus Version 2.0 Names

In version 2.0, Unicode changed many code point "Names" from version 1. At the same moment, Unicode stated that from then on, an assigned Name to a code point will never change anymore.