Module:String2

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local p = {}

p.upper = function( frame )
	local s = mw.text.trim( frame.args[1] or "" )
	return string.upper( s )
end

p.lower = function( frame )
	local s = mw.text.trim( frame.args[1] or "" )
	return string.lower( s )
end

p.sentence = function (frame )
	local s =  mw.text.trim( frame.args[1] or "" )
	local strFirst = string.sub( s, 1, 1 )
	local strRest = string.sub( s, 2 )
	return string.upper( strFirst ) .. string.lower( strRest )
end

return p