Web 3 0

Web 3.0 Semantic Markup, Reusing Other People's Information and Providing Information of Your Own Robin Hastings [email_address] http://www.rhastings.net

Agenda

Web 3.0? I just got used to 2.0...

SaaS

Mashups

Semantic Web

Agenda

Markup for 3.0 sites

XHTML

Microformats

XML (and derivatives)

Agenda

Our heads are in the clouds

Agenda

Reduce, Reuse, Recycle

Techie tools - parsing XML

Non-Techie tools - widgets!!

Web 3.0

Web 3.0 Showdown

Web 2.0

Social Networking sites

Wikis

Communication Tools

Folksonomies

Emphasizes online collaboration & sharing

Web 3.0

Semantic Web

Microformats

Natural Language Search

Data Mining

Machine Learning

Recommendation Agents

Web 3.0 Showdown Machine-readable and -understandable information

SaaS & Mashups

SaaS = Software as a Service

Salesforce.com

Mashups = 2 discrete data sources combined to create a unique application

SaaS & Mashups

Create your own SaaS (mashups)

GasBuddy

Government data & ?

Show Us A Better Way

Yahoo Pipes

Popfly

Semantic Web

The web as a database

All content on the web is queryable

All content on the web is marked up properly

Semantic Web - RDF

RDF

Resource Description Framework

RDF provides a model for data, and a syntax so that independent parties can exchange and use it

rdfdata.org - public collections of data in RDF format

<?xml version="1.0"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/ 22-rdf-syntax-ns#" xmlns:cd="http://www.recshop.fake/cd#"> <rdf:Description rdf:about="http://www.recshop.fake/cd/ Empire Burlesque"> <cd:artist>Bob Dylan</cd:artist> <cd:country>USA</cd:country> <cd:company>Columbia</cd:company> <cd:price>10.90</cd:price> <cd:year>1985</cd:year> </rdf:Description> </rdf:RDF>

RDF

Web information has exact meaning

Web information can be understood and processed by computers

Computers can integrate information from the web

RDF - Schemas & OWL

Schemas

Application-specific classes

Define app-specific data

OWL

Web Ontology Language

Built on top of RDF

For processing data on the Web

Semantic Web - SPARQL

SPARQL

Query language for RDF

Allows questioning of resources on WWW

Looks a lot like SQL...

This SPARQL query selects the names of all the people I know: PREFIX table : < http://www.foaf.fake/RH #> SELECT ?name FROM <http://www.foaf.fake/RH.rdf> WHERE { ?element table :name ?name. } <foaf:knows> <foaf:Person> <foaf:nick>Cal</foaf:nick> <foaf:name>Cal Henderson</foaf:name> <foaf:mbox_sha1sum>2971b1c2fd1d4f0e8f99c167cd85d522a614b07b</foaf:mbox_sha1sum> <rdfs:seeAlso rdf:resource="http://www.iamcal.com/foaf.xml"/> </foaf:Person> </foaf:knows>

Markup for 3.0 Sites

Markup for Web 3.0

Proper markup means we can reuse information

Proper markup means we can disseminate information easily

Proper markup means we can produce efficient and reliable questions/search results for the web

Markup for Web 3.0

Search now - keyword & boolean

Saturday Night Fever actor

Pulp Fiction actor

list of all actors in SNF & PF = human comparison and matching

Search 3.0 - SQL-like queries that gets information, not just facts

Who starred in both Saturday Night Fever and Pulp Fiction?

XHTML

A good start

XHTML - more machine readable, more strict than HTML

Parsers can pull out information

Microformats

XHTML markup for specific uses

Metadata - attaches semantics to XHTML tags

hCalendar

Specific attributes that indicate date events

hCard

Specific attributes that indicate address elements

Microformats - hCard

<address class="vcard" > <a class="fn url " href="http://rhastings.net/"> Robin Hastings</a> </address>

XML

Granddaddy of XHTML, HTML, RDF, Microformats, etc.

Includes RSS & Atom

Machine readable - and extensible

Our heads are in the clouds

Reduce, Reuse, Recycle

Reduce your work

Mark up your content for reuse

Provide updates without extra work

Write once, use often

Take other people's work and use it

Get calendar events from local organizations

Get updates from anyone your users might care about

Reuse your work

RSS

Magpie - PHP RSS Parser

RSS Parser - Ruby On Rails Parser

Code Beach - ASP Parser

Write Once, Use Many

Directed laziness

Microformats

require_once 'rss_fetch.inc'; $url = 'http://magpie.sf.net/samples/ imc.1-0.rdf'; $rss = fetch_rss($url); echo "Site: ", $rss->channel['title'] , "<br> "; foreach ( $rss->items as $item ) { $title = $item[title]; $url = $item[link]; echo "<a href=$url>$title</a> </li><br>"; }

RSS - ultimate recycler