There is not really a standard on the symbols used for writing drum sheets in the world, each continent have its own pitch that represents the different instruments of the drums. When I started to write drum sheets for the website I had to choose my symbols and I do not change any more so that all the sheets are uniform.
What I like in this writing is that the hihat, the snare drum and the bass drum are very clearly separated and it follows a logic of verticality with the bass drum at the bottom, the snare drum in the middle and the hi-hat at the top. For toms, I keep the logic high / low as on a piano.
Here are the symbols :
Main bass drum (BD)
Second bass drum (BD)
Snare drum or cross-stick (SN)
Closed Hihat (HH)
Opened hihat (HH)
Closed Hihat played with foot (HH)
Opened Hihat played with foot (HH)
High Tom-tom 1 (T1)
High Tom-tom 2 (T2)
High Tom-tom (T3)
Low Tom-tom 1 (T4)
Low Tom-tom 2 (T5)
Crash cymbal, undefined size and series (C1)
Splash Cymbal (C3)
China Cymbal (C2)
Ride Cymbal (RD)
Cup ride Cymbal (RD)
Special sounds, it can be a clap sound, a tambourine, a sound that is not in the usual drums instrumentarium.
On a “standard” drums, T2, T3 and T4 will be played.
You can download the list of symbols here: