15. The computer-readable storage medium of claim 11 , wherein acquiring further comprises: determining a mapping formula for transforming a schema of the first element in the stored association to a schema of the second element in the stored association.
15. The computer-readable storage medium of claim 11 , wherein acquiring further comprises: determining a mapping formula for transforming a schema of the first element in the stored association to a schema of the second element in the stored association. 16. The computer-readable storage medium of claim 15 , wherein acquiring further comprises: determining a target value based on the association and the mapping formula; and displaying the target value.