Keyphrases
- virtual world
- virtual environment
- multi user
- context free grammars
- physical world
- virtual reality
- natural language
- virtual communities
- virtual humans
- mixed reality
- context free
- virtual learning environments
- broad coverage
- virtual objects
- computer vision
- graph grammars
- grammatical inference
- formal languages
- tree grammars
- grammar rules
- virtual space
- linguistic knowledge
- social context
- parse tree
- information processing
- social media