Table 1 Composition of article corpus by source
Text source type | Number | % |
|---|---|---|
MEDLINE Abstract | 183,019 | 67.9 |
Elsevier XML | 40,261 | 14.9 |
Pubmed Central Open Access Subset XML | 32,113 | 11.9 |
Pubmed Central Author Manuscript XML | 13,777 | 5.1 |
No content retrieved | 267 | 0.1 |
Pubmed Central Open Access Subset text file | 52 | 0.02 |
Total | 269,489 | 100.0 |