The article said:
The complete parchment codex is in its original binding, containing Hebrew script so archaic that it incorporates Babylonian vowel pointing (akin to Old or Middle English for the English language). That vowel pointing has led researchers to place the prayer book in the times of the Geonim (Babylonian, Talmudic leaders during the Middle Ages).
Does anyone have any more information to explain what was "Babylonian vowel pointing"?