1. Semantic Web
Exam 1 Review

2. Agenda
URI
XML
RDF
RDF/XML
RDFS
SPARQL
Reification
Design Patterns

3. URI Jargon Summary soap://www.visa.com/CreditCardService# URI Context
URISchemeName:schemeSpecificPart
Scheme
Name
Scheme Specifics Part
soap://
QName
XMLNS Context
Qualified Name (QName) – as text macro for entity and attribute names
!ENTITY Context
Text macro for attribute values (dereference with &;)

4. URI Jargon Summary Valid URI Examples URISchemeName:schemeSpecificPart
urn:monterey#1
sc:johnny

5. XML structure XMLNS scope and effect !ENTITY usage
Entity, attribute, content
Reading RDF/XML

6. RDF & RDF/XML Verbs (properties) defined in RDF Reading RDF/XML
Usage and meaning
Reading RDF/XML
How many triples?
What graph structure?
Classes, properties, and short-cuts
Limitations of RDF and RDF/XML for semantic web needs
Writing RDF/XML statements
Point to a literal
Point to an existing resource (i.e. rdf:resource)

7. RDF & RDF/XML Draw graph from RDF/XML and N3 data
Resources as circles/ellipses and literals as boxes.
Short labels in each shape and on lines
Bring a pencil if you have trouble making figures with pen
Note that containers include a rdf:type node and use _1, _2, etc
Collections do not use a type node and use ‘first’, ‘rest’, and nil

8. RDFS Verbs (properties) defined in RDFS Transitive relationships
Emphasis on:
subClassOf and subPropertyOf
domain and range
Transitive relationships

9. RDF/RDFS Example Creation-date is a property. (Makes a triple)
<?xml version="1.0"?>
<!DOCTYPE rdf:RDF [<!ENTITY exterms "
<rdf:RDF xmlns:rdf="
xmlns:dc="
xmlns:exterms="
xmlns:other="uri:">
<rdfs:Property rdf:about="&exterms;creation-date">
<rdf:Description rdf:about="
<exterms:creation-date>August 16, 1999</exterms:creation-date>
<dc:language>en</dc:language>
<dc:creator rdf:resource="
</rdf:Description>
<rdf:Statement>
<rdf:subject rdf:resource="
<rdf:predicate rdf:resource=“&exterms;creation-date"/>
<rdf:object>August 16, 1999</rdf:object>
<dc:creator>"Stewart"</dc:creator>
<other:creatorConfidenceInFact>"95%"</other:creatorConfidenceInFact>
</rdf:Statement>
</rdf:RDF>
Creation-date is a property. (Makes a triple)
This “Statement” (i.e. reification) is a blank node
Stewart claims he knew the creation date and his confidence in it.

10. SPARQL Writing SPARQL SELECT queries Blank node handling and meaning
Query for all triples
Blank node handling and meaning
Handling containers - Query for one or more specific elements off the container (hint: use UNION)
Text macros
BASE, PREFIX
Handling containers and collections
Named Graphs and default graph
Use of UNION
Especially consider Sparql_PopQuizAndInClassLab.ppt

11. Reification Meaning of reification
Reification class type and required properties
Meaning of metadata from reification node
Meaning of multiple reification nodes

12. Design Patterns Pattern Categories For patterns presented
Architectural vs Design vs Idioms
For patterns presented
The need for the pattern
The foundational idea of the pattern
Specifically info in Lecture 4 – SubsetOfHeadsUpPatterns.ppt
Architectural pattern
Design Pattern
Idiom
Factory Method
Singleton
Object Pool
Composite
Decorator
Observer
Strategy
Template Method

13. Ontologies VCARD Dublin Core FOAF
For personal business cards (pretty much contact info)
Dublin Core
For basic metadata – creators, dates, scope of creations/entities
FOAF
For friendships, working relationships to others, organizations, and groups

14. Not covering New material presented from Ch 10 and 11 (i.e. OWL)
New material presented in Ontology Design 101
Jena specifics
UML and Lecture 6 design patterns