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Changes between Initial Version and Version 2 of Ticket #10006

-                      initial
+                      v2
 Similar case: currently {{{<span>}}} is allowed because plugins like font, colorbutton allow styles which base on span elements. So when pasting e.g. {{{<span lang="pl">}}}, lang is filtered out, but {{{<span>}}} left.
+In fact, span is a special case, because when it doesn't have any attrs/styles/classes it should be removed automatically. So, to simplify implementation we can make two fixes:
+=== Proposed fix: ===
+. There should be a way to mark attrs/style/class as required. Element is marked by this rule as valid (element has to be valid, otherwise it will be filtered out) only if it has this required property.
+. After applying filter, spans without attributes should be removed.
+There should be a way to mark attrs/style/class as required. Element is marked by this rule as valid (element has to be valid, otherwise it will be filtered out) only if it has this required property.