Keyphrases
- indoor navigation
- semantic data model
- object oriented
- data model
- extended entity relationship
- query language
- database schema
- entity relationship
- knowledge representation
- structured environments
- programming language
- data types
- relational schema
- database management systems
- database applications
- database technology
- database
- domain specific
- relational databases
- integrity constraints
- database design
- relational model
- data modeling
- data sources
- query processing
- database systems
- knowledge base