Integration with respect to ln(x)

How do you integrate INT[ 1 * d(ln(x))]

So it's not with respect to x, it's with respect to ln(x)

If u is any integrable function, then :
INT [ (1) du ] = u + c.
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If u = ln x, then this result becomes :
INT [ (1) d( ln x ) ] = ( ln x ) + c.
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