Semantic Web Programming in Python an Introduction Biju

Semantic Web Programming in Python an Introduction Biju B Jaganath G

Presentation outline l l l l Semantics Meaningful data Representation Triple Store Querying & Searching semantic Data RDF SPARQL FOAF (Friend of a Friend) OWL

Semantics l Semantics is the study of meaning l Sequence of words or symbols used to convey enough meaning

Traditional Data-Modeling methods l Tabulated Data l Relational Data-Model

Tabulated Data l Doctors Near Home Name Address George Xyz St Bill Abc Rd

Relational Data-Model ID 1 2 Name George Bill Address Xyz St Abc Rd ID Available timings 1 1 2 10 AM – 1 PM 7 PM – 10 PM 6 PM – 10 PM

Meaningful data Representation l Triple : Three column Format l A Triple is composed of a subject, predicate and object l Triples could be represented easily in the form of graphs

Triple l l l Babu bought doll Doll costs 20 Subject : An entity which could be person place or other concrete objects Predicate: Property of the entity. Object : could be Subject to other triples or literal value

Merging Triples As the Triples are represented in the form of graphs the merging could be done with less effort

Simple Query Language Demo

Feed Forward Inference l l l Inferring Triple Geocoding Chain of Rules

RDF Provides standard way of expressing graphs of data and sharing them with other people

RDF Data Model l Resource Serialization N-Triples

RDFLib Introduction Demo

SPARQL l l l RDF Term Syntax for Triple Patterns SPARQL Queries in RDFLib

FOAF l l l Social Network Graph Analysis Cloud of Data Consuming Linked Data

OWL Demo

Semantic Data Publishing l l l Microformats Tables and Spreadsheets Linked Data

Demo

Conclusion