Table 1 PCC of ESA based on the number of index documents (Anderka and Stein 2009)
| Index collection | Number of index documents | |||||
|---|---|---|---|---|---|---|
| 1,000 | 10,000 | 50,000 | 100,000 | 150,000 | 200,000 | |
| Wikipedia TFIDF | 0.742 | 0.784 | 0.782 | 0.782 | 0.781 | 0.781 |
| Index collection | Number of index documents | |||||
|---|---|---|---|---|---|---|
| 1,000 | 10,000 | 50,000 | 100,000 | 150,000 | 200,000 | |
| Wikipedia TFIDF | 0.742 | 0.784 | 0.782 | 0.782 | 0.781 | 0.781 |