ASTROL | ⊕ 1978 | ⊕ Germany | |||
MiniLex | ⊕ 1978 | ⊕ Germany | |||
PRA | ⊕ 1978 | ⊕ Germany | PRAgmatics | ||
SEM | ⊕ 1978 | ⊕ Germany | |||
SYN | ⊕ 1978 | ⊕ Germany | specification language | ||
USL | ⊕ 1978 | ↓ ↑ ⊕ Specialised Languages | ⊕ Ad hoc query languages | ⊕ Germany | Near natural language querying system |