Source: Mark Davis
Subject: Actions on Normalization and Casing Stability
A173 Draft a revision of stability policies to include casing stability and NPSS_related changes to normalization stability and post as L2 doc.
Here is my draft (see also
Proposed changes for: http://www.unicode.org/policies/stability_policy.html
Between "Normalization Stability" and
"Applicable Version: Unicode 3.1+", insert:
Once a character is assigned, the decomposition mapping will not change.
Canonical Combining Class
Once a character is assigned, the canonical combining class will not change.
Add at the end, after "Case Folding Stability":
Case Pair Stability
Applicable Version: Unicode XX (TODO - set XX to the earliest applicable version)
Once two characters are
assigned, whether or not they are a case pair remains stable.
More formally, for given versions
V and U of Unicode, and two characters X and Y that are both assigned according to both V and U: