| Field Key | Label | Data classes | Brief help |
| ARGS | Annotated ref. sequence | FBgn | -- |
| CEL | Cellular location | FBgn HUgn MGgn SGgn | -- |
| CHR | Chromosome | ATgn CEgn FBgn HUgn MGgn SGgn ZFgn | -- |
| CLA | Class of gene | CEgn FBgn HUgn SGgn | -- |
| DBA | DNA/RNA accessions | HUgn MGgn ZFgn | -- |
| DBL | Database accessions | CEgn FBgn HUgn MGgn ZFgn | -- |
| DID | Ref. Database | ATgn CEgn FBgn HUgn MGgn SGgn ZFgn | -- |
| DT | Date | FBgn | -- |
| ENZ | Function | CEgn FBgn HUgn MGgn SGgn ZFgn | -- |
| FNC | Process | ATgn CEgn FBgn HUgn MGgn SGgn | -- |
| GENR | Gene Record | ATgn CEgn FBgn HUgn MGgn SGgn ZFgn | -- |
| GPD | Gene product | FBgn | -- |
| HG | Similar genes | ATgn CEgn FBgn HUgn MGgn SGgn ZFgn | -- |
| ID | Database ID | ATgn CEgn FBgn HUgn MGgn SGgn ZFgn | -- |
| MAP | Map location | ATgn CEgn FBgn HUgn MGgn SGgn | -- |
| NAM | Full name | FBgn HUgn MGgn ZFgn | -- |
| ORG | Organism | ATgn CEgn FBgn HUgn MGgn SGgn ZFgn | -- |
| PAC | Protein accessions | ZFgn | -- |
| PDOM | Protein domains | FBgn ZFgn | -- |
| PHI | Phenotypic info. | ATgn CEgn SGgn | -- |
| PHP | Phenotypic info. | CEgn HUgn SGgn | -- |
| PRD | Protein data | CEgn HUgn MGgn | -- |
| REAB | Summary | CEgn HUgn | -- |
| RETE | Table Entry | ATgn CEgn FBgn HUgn MGgn SGgn ZFgn | -- |
| RPA | Ref. protein | ATgn CEgn FBgn HUgn MGgn SGgn ZFgn | -- |
| RSQ | Ref. sequence | FBgn HUgn MGgn ZFgn | -- |
| SYM | Symbol | ATgn CEgn FBgn FBgo HUgn MGgn SGgn ZFgn | -- |
| SYN | Synonyms | ATgn CEgn FBgn FBgo HUgn SGgn | -- |
| URL | Database URL | HUgn | -- |