yiisoft/yii2 — pull request #1186 by mcd-php (2013-11-12 10:21:07+00:00)
Title: FIX: Sort separator '.' was breaking deep fields, '~' instead

'~' is 1) Not reserved by http://tools.ietf.org/html/rfc3986 2) Does not mix with namespace/class/name separator in any major programming language