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→Notation: clarified that operations and actions are synonymous |
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* '''Columns:''' The different transactions in the schedule.
* '''Rows:''' The time order of operations (a.k.a., actions).
Operations
* '''R(X):''' The corresponding transaction "reads" object X (i.e., it retrieves the data stored at X). This is done so that it can modify the data (e.g., X=X+4) during a "write" operation rather than merely overwrite it. When the schedule is represented as a list rather than a grid, the action is represented as <math>Ri(X)</math> where <math>i</math> is a number corresponding to a specific transaction.
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