| CHI | ⊕ 1981 | ↓ ↑ ⊕ Specialised Languages | Description languages | ⊕ United States | Logic-based system for transformations |
| LaSt | ⊕ 1999 | ↓ ↑ ⊕ String and List Processing | Description languages | ⊕ United States | |
| SYNTOL | ⊕ 1960 | ↓ ↑ ⊕ Specialised Languages | Description languages | ⊕ France | French IR language |