| XTRACT: A System for Extracting Document Type Descriptors from XML Documents Recent countries visiting this post |  |
 | 7 | United States |
 | 5 | |
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| XTRACT: A System for Extracting Document Type Descriptors from XML Documents Recent countries visiting this post | |
| 7 | United States |
| 5 | |
| 1 | Sweden |
| 1 | India |