Hello Ed,
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		| Thanks for the gangay-blade explanation. "Tradition" does cover a lot of bases and is accepted by cultures as "Just the way it is" to be a proper kris" | 
	
 There is lots of underlying meaning: However it apparently changed through time and, especially, between cultures. This would need a really long essay to do the topic justice...
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		| Also, I guess that the kris is more for Cultural Presentation than for mechanical strength for fighting. | 
	
 The Moro kris has been an all-out fighting blade into at least the 1990s; during the colonial period, US soldiers considered kris wounds more deadly than those inflicted by the formidable barung.
The Indo-Malay keris was readily utilized in (very) close quarter fighting, too. Obviously, it's a specialized dagger and not designed to excel at chopping/cutting/etc.
Regards,
Kai