An Exponentiation Method for XML Element Retrieval

Table 9

Best performing runs based on MAP over the list topics.

Run	MAP	1/Rank	P@10	P@20
p16-BM25-EXPO	0.4251	0.7778	0.4778	0.3833
p4-UAms2011adhoc	0.3454	0.6674	0.4222	0.3500
p77-PKUSIGMA02CLOUD	0.3332	0.5432	0.3889	0.3667
p2-ruc11AS2	0.3264	0.6488	0.4111	0.3333
p48-MPII-TOPX-20-co	0.2578	0.4926	0.3000	0.3333
p18-UPFbaseCO2i015	0.2242	0.5756	0.3556	0.3278
p12-IRIT-focus-mergeddtd-04	0.1532	0.2542	0.2333	0.2111
p30-2011CUTxRun3	0.0847	0.5027	0.1889	0.1611
p47-FCC-BUAP-R1	0.0798	0.3902	0.2889	0.2500

The bold font refer to the % that use to calculate value of improvement.