Keyphrases
- path expressions
- xml data
- xml documents
- complex objects
- object oriented databases
- semi structured data
- query language
- xml queries
- cost model
- semistructured data
- regular expressions
- relational database systems
- xml databases
- query execution
- data model
- xpath queries
- semi structured
- structured data
- web mining
- databases
- information extraction
- efficient processing
- distance function
- data structure