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* new parser function & variable ARTICLEPAGENAME, ARTICLEPAGENAMEE
* new parser function & variable SUBPAGENAME, SUBPAGENAMEE
* new parser function & variable ROOTPAGENAME, ROOTPAGENAMEE
* new parser function & variable BASEPAGENAME, BASEPAGENAMEE
* new parser function titleparts
* site context: clean and canonical title perform previous space cleaning and unescaping of html entities.