| 30 different keyphrases | Search | Percent |
| metamap | 6 | 15.3 % |
| umlsks metamap | 3 | 7.6 % |
| metamap source vocabularies | 2 | 5.1 % |
| metamap nlm | 2 | 5.1 % |
| element phrases | 1 | 2.5 % |
| metamap semantic-types | 1 | 2.5 % |
| metamap xml output | 1 | 2.5 % |
| metamap omim | 1 | 2.5 % |
| umls metathesaurus | 1 | 2.5 % |
| prase breaking algorithem | 1 | 2.5 % |
| pneumonia concept map | 1 | 2.5 % |
| installing metamap | 1 | 2.5 % |
| metamap debug switch | 1 | 2.5 % |
| interactive metamap | 1 | 2.5 % |
| metamap 2008 xml format | 1 | 2.5 % |
| metamap -o | 1 | 2.5 % |
| metamap prolog | 1 | 2.5 % |
| metamap 2008 negation detection | 1 | 2.5 % |
| suppresion cr xml java | 1 | 2.5 % |
| metamap nih | 1 | 2.5 % |
| metamap umls aronson | 1 | 2.5 % |
| metamap xml | 1 | 2.5 % |
| metamap help | 1 | 2.5 % |
| phrase breaking algorithms | 1 | 2.5 % |
| metamap filebuilder | 1 | 2.5 % |
| metamap source | 1 | 2.5 % |
| phrase breaking algorithm | 1 | 2.5 % |
| mmo to xml | 1 | 2.5 % |
| metamap aronson | 1 | 2.5 % |
| metamap data file builder | 1 | 2.5 % |