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!

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.

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)

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 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

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