To construct integrated secondary databases, primary source databases are classified into three categories.
| Category | Database |
|---|---|
| Disease | UMLS(Unified Medical Language System) |
| Disease, Gene | OMIM(Online Mendelian Inheritance In Man) |
| MorbidMap | |
| GAD(Genetic Association Database) | |
| NCBI | |
| Gene | HGNC(HUGO Gene Nomenclature Committee) |
| MitoDat(Universal Protein Resource) | |
| Uniprot | |
| Gene, SNP | UCSC Genome Browser Database |
| SNP | JSNP |
| ALFRED (Allele Frequency Database) | |
| dbSNP |
A schematic diagram of relational network between three secondary databases (genes, SNP, and disease)
