PDG charge definition

hello, is there have anyone help me to understand the what the “PDG charge” represent? what the Definition of the “PDG”? is there have any PPT or PDF or other website to explain this word?? thanks!! everyone

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2021: Particle Listings “PDG” is the Particle Data Group and includes the accepted values of many fundamental constants. In this case the fundamental charge of the electron.

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thank you reply!!! i will read this website which you provide! thank you.

sorry for the instrusion but I’m trying to understand different basic things of the geant4 structure.
Do you know exactly what ->GetPDGCharge() returns when the particle is an ion?

Thank you in advance