definition of semblance (and similar functions)?

Consider multi-channel data. You have a 2D array.
To compute semblance at a given time, divide the square of sum of the samples at
said time by sum of the squares of those samples. So if all the peaks line up
you get maximum semblance.
Now I came across some code that computed the absolute value of the sum of
the samples divided by the sum of the absolute values, and the concoctor
was calling it "semblance".
Does this absolute value similarity have a name?