Keyphrases
- xml documents
- labeling scheme
- xml data
- xpath expressions
- path expressions
- xml schema
- xml databases
- xml queries
- collaborative learning
- querying xml documents
- html documents
- data model
- collaborative environment
- xpath queries
- semistructured data
- twig pattern
- structured documents
- relational databases
- relational data
- shortest path
- knowledge management
- search engine
- sql queries
- regular expressions
- knowledge sharing
- information sharing
- tree structure
- web documents
- collaborative problem solving
- information retrieval systems