Research Article
Recognition and Evaluation of Clinical Section Headings in Clinical Documents Using Token-Based Formulation with Conditional Random Fields
Table 4
Occurrence information.
| Description | Feature value |
| The token was not matched. | 000 | The token only appeared in the first token among all section headings. | 001 | The token only appeared in the middle token among all section headings. | 010 | The token only appeared in the last token among all section headings. | 100 | The token appeared in both the first and middle tokens among all section headings. | 011 | The token appeared in both the middle and last tokens among all section headings. | 110 | The token appeared in both the first and last tokens among all section headings. | 101 | The token appeared in all places among all section headings. | 111 |
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