Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] key pairs public and private creating 2nd 3rd 4th keyboard shortcuts 2nd keypair.snk file public information keyref constraints 2nd 3rd keys defining DataSets using XML schema key constraints 2nd keyref constraints 2nd 3rd relationships unique constraints secret keywords extern new partial struct using virtual 2nd |