Keyphrases
- path queries
- xml data
- xml query processing
- path expressions
- shortest path
- xml documents
- twig queries
- index structure
- xml queries
- road network
- xml databases
- data structure
- labeling scheme
- regular path queries
- query optimization
- query processing
- query language
- rdf graphs
- data model
- semi structured data
- relational databases
- relational data
- relational database systems
- object oriented
- complex queries
- join algorithms
- xml schema
- complex objects
- object oriented databases
- relational model
- keyword search
- xpath queries
- query evaluation
- encoding scheme
- semi structured
- data exchange
- xml query languages
- semantic web
- multi dimensional