| Effective keyword search for valuable lcas over xml documents Recent countries visiting this post |  |
 | 5 | United States |
 | 3 | |
 | 1 | Japan |
 | 1 | China |
| Effective keyword search for valuable lcas over xml documents Recent countries visiting this post | |
| 5 | United States |
| 3 | |
| 1 | Japan |
| 1 | China |