

…Yes, if you go back and read my fist post, you will find that I, too, refer to tabs as notation, and say: “it’s a customary txt-format notation”. And if you go to the wiki article you linked and read the sentence after the one you pasted, you’ll find it says :“ASCII tab is intended to be a human-readable format rather than machine-readable, and hence is not strictly defined.”.
Wanna see another musical notation method that doesn’t actually notate music?
+5 -6 -7 +7 -6 +5 -6 -7 +7 -6
+5 -6 -7 +7 -7 -6 +7 -7 -6 +8 +8 +8
+8 -8 +8 -9 -9 -9 +8 -8 -9 +8
-8 +7 -7 +8 +7 -7 -6
That’s a harmonica tab - the number is the hole, the sign is inhale-exhale, but to actually play the song, you need to already know the tune to Bella Ciao.
The phrase you are being nudged towards is “false positive”.