Semantic Web @ Drupal Camp Dallas2009

Semantic Web originally presented at DrupalCamp Dallas 2009 Chris Ruppel @rupl

What is the Semantic Web?
Current web is made of generic documents linking to each other
Semantic web is composed of meaningful documents that declare their relationships in a machine-readable way.

How do they differ?
HTML is a display language. It only specifies paragraphs, lists, headings etc.
We want to tell the world about the *nature* of our content, not just the formatting.

Way more useful to computers. It’s like having a database described via XHTML.
They can transform data in ways we couldn’t see before.
They can automate tedious tasks, or extend the functionality of our applications.
How is it Beneficial to Us?

Well-chosen HTML Tags
Links to other pages on same domain
Heading 1
Paragraphs of words words words words words words words words words words words words words
Link to different website
Link to different website
Some mildly related words
Semantic Metadata in HTML
Site Navigation
Article Title
Main content of this document, contains the bulk of the useful info that a reader will be searching for.
Article Reference #1
Article Reference #2
Sponsored Text Ads

What’s the Benefit?
Helping Search Engines Help Us All
Rich Snippets make search results more useful
No need for a branded social network, the whole internet will suffice!

Awesome, but How?
Microformats
Simple conventions made of classes in HTML
Focus on common, real-world content types
hCard – contact information
hReview – reviews of products, events, businesses, etc
XFN – XHTML Friends Network, describes social relationships
rel-tag – for a glossary term or definition
RDF / RDFa
A W3C standard for defining any type of content using “triples”
Designed to be public, decentralized and reusable by anyone/anything
Integrate any combination of vocabularies to make your own mashup

Microformats in Drupal
You might use microformats already!
Drupal Modules
Tagadelic outputs rel-tag
Location can output hCard (kind of incomplete)

RDFa in Drupal 7 Core
Dries originally included RDF support in 2000
Challenged the community to get RDFa into Drupal 7 core
CCK provides all the data RDFa needs
Everyone can publish semantic data easily!

High-Profile Examples
XFN on Facebook
hCard on Twitter
rel-tag on Technorati
RDFa on Digg

Live Demos - Microformats
http://whichtwitterapp.com - Reviews
hReview
hCard
rel-tag
rel-home
rel-bookmark (permalink)
Hundreds of examples at http://microformats.org/wiki/

Live Demos - RDFa
http://buytaert.net
DC and FOAF
http://chrisruppel.com
FOAF
XFN

Useful Links
Example that shows how Microformats and RDFa intersect http://www.standards-schmandards.com/2007/rdfa-and-accessibility/
Getting started with RDFa http://webbackplane.com/mark-birbeck/blog/2009/04/getting-started-with-rdfa
Bookmarklet to check any page for RDFa elements http://ubiquity-rdfa.googlecode.com/svn/trunk/install-checker.html
FOAF Spec http://xmlns.com/foaf/spec/
Google Webmasters RDFa Help http:// www.google.com/support/webmasters/bin/answer.py?hl = en&answer =146898 http:// www.google.com/support/webmasters/bin/answer.py?answer =146645
Open Calais Module for Drupal http://www.opencalais.com/applications/calais-module-drupal

Semantic Web @ Drupal Camp Dallas2009

by rupl on Aug 07, 2009

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Semantic Web @ Drupal Camp Dallas2009 — Presentation Transcript

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