Linked Data Planet Key Note

Presentation Goals
Demystify Linked Data
Demonstrate the unobtrusive nature of Linked Data
Explore how Linked Data can Work for You!
© 2008 OpenLink Software, All rights reserved.

Situation Analysis
User-generated content is growing exponentially
Enterprise & individual connectivity is growing
The line between the Individual & the Enterprise is blurring
The discovery & exploitation of Data, Information, and Knowledge remain the ultimate critical success factors
But there are still only 24 hours in a day!

A Few Definitions
What is Data ?
How we express observation
What is Information?
How we use Context to perceive observation
What is Knowledge?
How we Comprehend what we perceive

Important (IMHO) Note!
Data , Information , and Knowledge are subjective terms
Context [of the beholder] ultimately determines what’s actually what
Data is the lowest common denominator
Everything we do in IT ultimately comes down to Access , Manipulation , and Dissemination of Data across a spectrum of Context vectors.

What is Data Access by Reference?
How you access Data using Data Source Names (Identifiers)
Identifiers may be Natural (human readable) or Synthetic (machine readable)

Data Source Name Examples
ODBC
DSN=“CRM”;HOST=crm.example.org;SVT=Oracle;DATABASE=CRM;TABLE=CUSTOMER
JDBC URL
jdbc:openlink://crm.example.org/SVT=Oracle/DATABASE=CRM/TABLE=CUSTOMER
LSID URN for “ Elephant-eared kangaroo rat” from Universal Biological Indexer & Organizer
urn:lsid:ubio.org:namebank:762537
Information Resource Uniform Resource Identifiers (URIs)
http://myopenlink.net/dataspace/person/kidehen (Profile Page)
Data Web Entity (that isn’t an Information Resource) Identifier
http://myopenlink.net/dataspace/person/kidehen#this (this Entity that is primary topic of the Profile Page above)

What is Linked Data?
A term coined by Tim Berners-Lee that describes HTTP-based Data Access by Reference for the Web
A richer Linking mechanism for the Web that takes us from Hypertext Links (Document to Document) to Hyperdata Links (across things that documents are about)

It exposes the compound nature of Web Resources
It provides an Open Data Access & Connectivity mechanism for the Web
It delivers a powerful mechanism for meshing disparate and heterogeneous data sources
It offers an unobtrusive mechanism for unveiling the prowess of the broader Semantic Web vision.
Why is Linked Data Important? © 2008 OpenLink Software, All rights reserved.

Linked Data Tenets
Give Names to things you describe so that they become uniquely Identifiable Resources (Data Sources)
Incorporate HTTP into your naming scheme so that you extend data access scope to your internal networks and/or the World Wide Web

Contd: Linked Data Tenets
Use the RDF Data Model to describe your Resources
Use HTTP-based Resource Names (URIs) when creating RDF Data Model records (Triples)

Linked Data & ODBC Similarities
An ODBC Data Source Name (DSN) is equivalent to a Linked Data URI
An ODBC Data Source is equivalent to a Linked Data Resource.

Linked Data & ODBC Differences
Open Database Connectivity Lacks:
Model Dexterity (tightly bound to Relational Model)
Reference Granularity (stops at Table/View level)
HTTP protocol component in Naming Scheme (vulnerable to DBMS engine, Host OS, Network Protocol, and other infrastructural specificity)

What is the Linked Data Web?
A World Wide Web of Named Data Sources (describing Documents or other Things)
A Giant Global Graph of Named Data Sources where Hyperdata Links provide the Link Tapestry
A evolution of the Web where the Description of anything is discernable via it’s Data Source Name (URI).

How will Linked Data Materialize on the Web?
Generated “on the fly” via RDF middleware from:
Existing Web Pages (POSH, Microformats, eRDF, RDFa, GRDDL)
Web 2.0 Data Spaces (Social Networks, Blogs, Wikis, Bookmarks, Online Discussions / Conversations, etc.)
Web Services (SOAP and REST)
Enterprise Data Sources
SOA oriented Web Services
XML based Data Warehouses and Views
Enterprise Databases (ODBC, JDBC, OLE-DB, ADO.NET, XMLA, Native CLIs)
Community driven extraction efforts
DBpedia, Bio2RDF, and many other Linking Open Data projects

Obtain a Linked Data Server capable of:
Creating URL rewrite-rules for handling Content Negotiation requests
Associating URL rewrite-rules with RDF data store queries using SPARQL
Generating Information Resources “on the fly” that provide physical provenance to Resource Descriptions
Minting dereferenceable HTTP URIs (including wrapper/proxy URIs for non RDF Linked Data Source)
Incorporating RDFization for transforming non-RDF Data into RDF)
How Do I Deploy Linked Data? © 2008 OpenLink Software, All rights reserved.

When a “User Agent” requests (X)HTML, make a “best effort” to expose associated RDF data via any of the following:
Use the <head/> section’s <link/> tag to expose RDF Data Source Names
Use simple RDFa or eRDF statements to embedded RDF Data Source Names within the (X)HTML via the <head/> section’s <profile/> tag for eRDF or RDFa use declaration and <link/> tag to expose RDF Data Source Names
If XHTML, use GRDDL to glean RDF from the source document via a combination of the GRDDL use declaration in the <head/> section’s <profile/> tag and an XSLT stylesheet exposed via the <link/> tag
When a “User Agent” requests XML
Use GRDDL to Identity Transformation Stylesheet
Linked Data Publishing Tenets © 2008 OpenLink Software, All rights reserved.

Linked Data Usage Examples
OpenLink Data Spaces
Zitgist Data Services
Bio2RDF
DBpedia
Library of Congress
US Census Data
Many others in the LOD Cloud

Linked Data Exploitation: Web
Data Silos will Die!
Context [as opposed to Content] becomes King!
Meshing (natural data linking) will replace Mashing (brute-force data linking)
Crystallization of Information At Your Fingertips vision without platform comprises

Linked Data Exploitation: Social-Networking
Construction & Deconstruction of Social-Networks will become a loose function of data links exposed via:
Our Tags
Our Interests
Our Realms of Discourse (comments associated with Blogs, Wikis, and other Data Spaces on the Web)
It’s Community, Stupid!
Community-building prowess will express Vitality
Vitality will be an expression of “Link Density”
Co-opetition will thrive.

Linked Data Exploitation: Enterprise
Conceptual interaction with Heterogeneous Data Sources that transcends
DBMS engine models
DBMS engine vendors APIs
SOA Web Services
Host Operating Systems
Simply “Peel-Back” the containment of Applications by integrating Linked Data Source Names into
ERP Systems
CRM Systems
Enterprise Collaboration Systems
HR Systems
Marketing Systems
Web Content Management & Corporate Communications Systems

Linked Data — The Web Done Right?
Yes, because it facilitates:
Broadening our perspectives (pivoting on data behind documents)
Serendipitous Discovery of relevant things via the Web
Exploitation of collective intelligence via Discourse, Discovery, and Participation

Additional Information
OpenLink Software:
http://www.openlinksw.com/
http://virtuoso.openlinksw.com/
http://www.openlinksw.com/blog/~kidehen (weblog)
Linking Open Data Community Projects
http://linkeddata.org/
http://dbpedia.org/

Linked Data Planet Key Note

by rumito on Jun 17, 2008

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Linked Data Planet Key Note — Presentation Transcript