Class Schedule April April April April 7 today

Class Schedule April April April April 7 (today) 8 x-period – Max, Diego 9 no class 11 - Riley, Ian 14 – Song, Josh 15 – Greg, Saurabh 16 – Jose, James 18 - Ali 21 - Guofei Jiang: RDF, DAML 23 - Wayne Chung: JXTA 25 28 30 – Valentino Crespi: examples Thayer School of Engineering Dartmouth May May May May 2 – Vince Berk 5 6 7 9 12 14 16 19 – Projects 20 – Projects 21 – Projects 23 – Projects 26 – Projects 28 – no class

Lecture 6 Overview • RDF Overview • Homework 2 discussion Thayer School of Engineering Dartmouth

RDF Overview • • Resource Description Framework World Wide Web Consortium (W 3 C) effort See http: //www. w 3 c. org/TR/rdf-primer A language for representing information about “resources” in the World Wide Web. • Implementation of syntax follows XML Thayer School of Engineering Dartmouth

RDF Model • Basic unit is a triple (subject, predicate, object) Think of this as (thing, property, value) • • Example (web page, creator, person) This is an RDF “statement” Each item can be identified by a URI Uniform Resource Identifier ala URL Thayer School of Engineering Dartmouth

Compare with databases • Relational DB model – Create Table Patient: ID (Integer) Name (String) Address (String) Birthdate (String) Gender (String) SSN (Integer) Thayer School of Engineering Dartmouth

Relational Database Table ID Name Address Birthdate Gender SSN 234 John Smith 18 Main 03/03/73 M 123456789 1432 Mary Jones 173 Lebanon 05/16/47 F 987654321 The relation itself is the “object”. It has properties ie, ID, name, etc Those properties have values Thayer School of Engineering Dartmouth

RDF example <rdf: RDF xmlns: rdf =“…” xmlns: patient=“…”> <patient: ID rdf: about=“http: //…/234”> <patient: Name>John Smith</patient: Name> </patient: ID> </rdf: RDF> <rdf: RDF xmlns: rdf =“…” xmlns: patient=“…”> <patient: ID rdf: about=“http: //…/234”> <patient: Address>18 Main</patient: Address> </patient: ID> </rdf: RDF> Thayer School of Engineering Dartmouth

RDF example… <rdf: RDF xmlns: rdf =“…” xmlns: patient=“…”> <patient: ID rdf: about=“http: //…/234”> <patient: Name>John Smith</patient: Name> <patient: Address>18 Main</patient: Address> </patient: ID> </rdf: RDF> Thayer School of Engineering Dartmouth

RDF Goals school attends student is a John is a sibling of Mary Infer that John attends school, etc Thayer School of Engineering Dartmouth

Assignment 2 due April 30 Teams to build 1. SQL Server with a simple database 2. Web services interface to SQL Server transforming database records to XML 3. Client to interact with SQL via XML/RDF Form 3 teams and details of DB and client April 16, teams April 18, plans for each team and agreements Thayer School of Engineering Dartmouth

Project Requirements • Identify a concrete problem related to data transfer and processing OR a development “tool” that would be useful for people to use • Apply as many aspects of web services to the concrete problem as you can • Metrics – technical difficulty, novelty, completeness • Individual or class effort? Thayer School of Engineering Dartmouth