Dsus4 x-x-0-2-3-3 or x-x-0-0-3-3 (= a D chord which is neither major nor minor)
G/B x-2-0-0-0-3 (= G chord with a "b" as the root)
D/F# 2-x-0-2-3-x (= D chord with a "f#" as the root)
The "%" signs mean "repeat the bar before", so "| D | % |" = two bars of D.
It's a common abbreviation. (Real Book etc.: https://www.swiss-jazz.ch/standards-jazz/AllOfMe.pdf)
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