[platform-ui-dev] Memento tags/types

[knut_radloff@xxxxxxx]

What's the policy for adding new memento tags? Should I keep them private 
or add them to IWorkbenchConstants?
I've seen both being done. E.g., TAG_EDITOR_REUSE_THRESHOLD, which seems 
very specialized and will likely not be used by anyone else, is in 
IWorkbenchConstants. "perspHistory" is hardcoded in Workbench.java.
I have two new tags that I use for fixing http://bugs.eclipse.org/bugs/show_bug.cgi?id=2120, "mruList" and 
"persistable".

Knut