SemiAutomatic Semantic Annotation for HiddenWeb Tables Cui Tao

Semi-Automatic Semantic Annotation for Hidden-Web Tables Cui Tao & David W. Embley Data Extraction Research Group Department of Computer Science Brigham Young University 1 Supported by NSF

Semantic Annotation § The Hidden Web: § § Hidden behind forms Hard to query “cdk-4" 2 www. deg. byu. edu

Semantic Annotation § The Hidden Web: § § Hidden behind forms Hard to query to find the protein and the animo-acids information for gene “cdk-4" 3 www. deg. byu. edu

Semantic Annotation § The Hidden Web: § § Hidden behind forms Hard to query § Semantic annotation § § Machine-”understandable” Publicly accessible 4 www. deg. byu. edu

System Overview § Initial semantic annotation § § Manually annotate a sample page With respect to a selected ontology § Table interpretation § § Automatic Tables from hidden web pages § Final semantic annotation § § Automatic Annotate interpreted tables 5 www. deg. byu. edu

Initial Semantic Annotation § SMORE: Semantic Markup, Ontology and RDF Editor [Maryland information and network dynamics lab] 6 www. deg. byu. edu

7 www. deg. byu. edu

Table Interpretation § Table interpretation § § § Locate label and value Pair label-value pairs Remember path § TISP – Table Interpretation by Sibling Pages 8 www. deg. byu. edu

TISP 9 www. deg. byu. edu

Interpretation Technique: Sibling Page Comparison Same 10 www. deg. byu. edu

Interpretation Technique: Sibling Page Comparison Almost Same 11 www. deg. byu. edu

Interpretation Technique: Sibling Page Comparison Different Same 12 www. deg. byu. edu

Interpretation Technique: Sibling Page Comparison Structure Pattern of a Table Label Path = Identification. Gene model(s). Gene Model Xpath = html[1]/…/table[3]/tr[1]/td[2]/table[1]/tr[6]/td[2]/table[1]/tr[2]/td[1] www. deg. byu. edu 13