On Specifying Semantics of Visual Spatial Query Languages.
Volker HaarslevRalf MöllerMichael WesselPublished in: VL (1999)
Keyphrases
- query language
- visual query language
- database query languages
- spatial information
- denotational semantics
- spatial relations
- visual information
- relational operators
- relational algebra
- data model
- expressive power
- tree pattern queries
- logic programming
- spatial data
- semantically relevant
- spatial configurations
- formal semantics
- spatial and temporal
- geographical information systems
- spatial databases
- relational calculus
- object oriented
- spatio temporal
- relational query languages
- spatial reasoning
- high level
- conceptual model
- temporal dimension
- relational data model
- query formulation
- database languages
- recursive queries
- sparql queries
- visual perception
- spatial distribution
- visual features
- programming language
- database systems