Introduction XML IR Query Semantic Query Processing(XmL Search Algorithm) Scoring and Ranking Result representation
6 Introduction • XML IR – Query Semantic – Query Processing (XML Search Algorithm) – Scoring and Ranking – Result representation
Outline · ntroduction XML Search XML Search Semantic XML Search Algorithms XML Scoring and Ranking Conclusion
7 Outline • Introduction • XML Search – XML Search Semantic – XML Search Algorithms • XML Scoring and Ranking • Conclusion
Ⅹ ML Search Languages Three classes of Xml search languages Keyword search book xml Path Expression Keyword search /book[ title about“ xml db” XQuery Complex full-text search for sb in /book let score Ss: =Sb ftcontains xml""&&db distance 5
8 XML Search Languages • Three classes of XML search languages – Keyword search • “book xml” – Path Expression + Keyword search • /book[./title about “xml db”]] – XQuery + Complex full-text search • for $b in /book let score $s := $b ftcontains “xml” && “db” distance 5
错误的 理想的 结果 Search semantic 结果 Researcher Research Projects Gender Institute Institute Projects Name Topic Researche Researcher Researcher Project Project Female Linda Researcher XML” Gender ProjRef Gender ojRe Name NameName Gender Name Gender ..Topic , Topic Female Alice Jde""Linda" Female "John"Male "XML""RDE Q: Female. XML Tree Graph(IDRef)
9 Search Semantic Q: Female, XML Research Institute Institute Projects Researcher Researcher Researcher Researcher Project Project Name Name Topic Topic ”Alice” ”Joe” Name ProjRef Name ProjRef ”Linda” ”John” ”XML” ”RDF” Gender Female Gender Male Gender Female Gender Male Project Topic ”XML” Researcher Name ”Linda” Gender Female Projects Topic ”XML” 理想的 结果 错误的 结果 Researcher Name ProjRef ”Linda” Gender Female Tree & Graph (IDRef)
Search semantic Factors affect the semantic Tre& Graph(是否考虑|DRef Relationship Between Entities(实体间的关系) Schema(是否考虑 Schema) ⅩML结构的灵活性 10
10 Search Semantic • Factors affect the Semantic – Tree & Graph （是否考虑IDRef） – Relationship Between Entities (实体间的关系) – Schema (是否考虑Schema) – XML结构的灵活性