I've encountered an issue with card designations that I believe to be redundant - may be wrong and as my wife will attest, that's very probable. AS (All-Star) and ASG (All-Star Game) are currently used and I'm sure the decision is based on what is written on the card, BUT for what it matters this is not abided consistently.
Take a look at 1997 Upper Deck Baseball and see an example of cards being designated differently (AS & ASG) despite the front of the cards having the same All-Star Game logo. You will see that I"ve added an ASG note (rather reluctantly, but I wish to be consistent with protocol) to Craig Biggio while other cards have AS, instead.
My belief is that AS suffices. ASG is redundant because all it means is that a player participated in the game. If he played in the All-Star game, then he is an All-Star.
Topps has some wonderful base set All-Star cards going back to the '50s that i'm collecting they're labeled as AS appropriately. Recently Topps has gone to labeling their product with All-Star Game logos, but the focus is still a player, not a situation or a recap as with some of the World Series cards that show player exploits, and they're labeled as ASG.
Anyway, I'd like for us to go simply with AS, but that's based on my understanding, my preference, my selfishness, and my feeble mind.
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“Aslan didn't tell Pole what would happen. He only told her what to do. That fellow will be the death of us once he's up, I shouldn't wonder. But that doesn't let us off following the signs.” - Puddleglum in The Silver Chair by C. S. Lewis