OpenLink Virtuoso - SQL & RDF RDF Views of SQL Data (Exposing SQL Data as RDF) Orri Erling Program Manager - OpenLink Virtuoso mailto: [email_address] .com

Virtuoso Universal Server Native SQL & XML DBMS Federated / Hybrid Data Server (Virtual Database Engine) Web Services Platform SQL to RDF Mapping Native RDF Quad Store (with SPARQL support) In-built RDF Middleware (“Sponger”) RDF Linked Data Deployment Platform

Native SQL & XML DBMS

Federated / Hybrid Data Server (Virtual Database Engine)

Web Services Platform

SQL to RDF Mapping

Native RDF Quad Store (with SPARQL support)

In-built RDF Middleware (“Sponger”)

RDF Linked Data Deployment Platform

Situation Analysis Data Drives Everything Data Heterogeneity is a fact of life There is no Information without Data The Era of Information Overload is Neigh Information Processing drives Corporate & Individual Agility

Data Drives Everything

Data Heterogeneity is a fact of life

There is no Information without Data

The Era of Information Overload is Neigh

Information Processing drives Corporate & Individual Agility

What We Hope Write The Final Chapter of the Information Integration Saga!

Write The

Final Chapter of the Information Integration Saga!

Yes, if... SPARQL to Match SQL for BI Queries Tools and Training for the Information Architect Successful Migration of Domain Specific XML Vocabularies to RDF

SPARQL to Match SQL for BI Queries

Tools and Training for the Information Architect

Successful Migration of Domain Specific XML Vocabularies to RDF

An Ideal Solution

Virtuoso’s RDF Views of SQL Data Functionality

What are RDF Views? Expose pre-existing relational data as virtual RDF graphs Available for querying through SPARQL or SPASQL (SPARQL embedded in SQL) No physical regeneration of relational data

Expose pre-existing relational data as virtual RDF graphs

Available for querying through SPARQL or SPASQL (SPARQL embedded in SQL)

No physical regeneration of relational data

Virtuoso RDF Views Implementation Quad Patterns Translate Relational Data to G, S, P, O Map Local or Heterogeneous Remote Data To RDF Map XML/Text/Web Services to RDF via Table Valued Functions Sophisticated Query Transformations and Optimization

Quad Patterns Translate Relational Data to G, S, P, O

Map Local or Heterogeneous Remote Data To RDF

Map XML/Text/Web Services to RDF via Table Valued Functions

Sophisticated Query Transformations and Optimization

Virtuoso SPARQL and SQL Extensions Aggregates, Grouping, Full Text for SPARQL SQL "Breakup" for Mapping Wide Rows to n-Triples Freely Intermingle SQL and SPARQL

Aggregates, Grouping, Full Text for SPARQL

SQL "Breakup" for Mapping Wide Rows to n-Triples

Freely Intermingle SQL and SPARQL

Northwind Demo Database Tables include: Demo.demo.Orders Demo.demo.Customers varchar(24) varchar(24) varchar(15) varchar(10) varchar(15) varchar(60) varchar(30) varchar(30) varchar(40) varchar(5) Mexico Mexico Germany Country (171) 555 - 7788 (5) 555 -4729 030 - 0074321 Phone 05023 05021 12209 Postal Code Avda. de la Constitucion 2222 Avda. de la Constitucion 2222 Obere Str. 57 Address Mexico D.F. Mexico D.F. Berlin City (5) 555 - 3745 Owner Ana Trujillo Ana Trujillo Emparedados y helados ANATR (171) 555 - 6759 Owner Antonio Moreno Antonio Moreno Taqueria ANTON 030 - 0076545 Sales Represe-ntative Maria Anders Alfreds Futterkiste ALFKI Fax Contact Title Contact Name Company Name Customer ID … 2 1995-11-13 1995-12-01 1995-11-03 4 ALFKI 10692 … … … … 1 Ship Via … 1995-10-23 Required Date … 1995-10-03 Shipped Date … … … 1995-09-25 6 ALFKI 10643 Order Date Employee ID Customer ID Order ID

Tables include:

Northwind Demo Database: RDF View Definition Extract prefix northwind: <http://www.openlinksw.com/schemas/northwind#> … create iri class northwind:Customer <http://^{URIQADefaultHost}^/Northwind/Customer/%U#this> (in customer_id varchar not null) … alter quad storage virtrdf:DefaultQuadStorage … from Demo.demo.Customers as customers from Demo.demo.Orders as orders … { Demo.demo.Customers Northwind RDF View Definition create virtrdf:NorthwindDemo as graph iri (“http://^{URIQADefaultHost}^/Northwind”) { … northwind:Customer(customers.CustomerID) a foaf:Organization as virtrdf:Customer-CustomerID ; northwind:companyName customers.CompanyName as … ; … northwind:fax customers.Fax as virtrdf:Customer-fax . … } } northwind:Customer(orders.CustomerID) northwind:has_order northwind:Order(orders.OrderID) as virtrdf:Order-has_order . Country Phone Postal Code Address City Fax Contact Title Contact Name Company Name Customer ID

prefix northwind: <http://www.openlinksw.com/schemas/northwind#>

…

create iri class northwind:Customer <http://^{URIQADefaultHost}^/Northwind/Customer/%U#this> (in customer_id varchar not null)

…

alter quad storage virtrdf:DefaultQuadStorage

…

from Demo.demo.Customers as customers

from Demo.demo.Orders as orders … {

Northwind Demo Database: RDF View Definition Extract prefix northwind: <http://www.openlinksw.com/schemas/northwind#> … create iri class northwind:Order <http://^{URIQADefaultHost}^/Northwind/Order/%d#this> (in order_id integer not null) . … alter quad storage virtrdf:DefaultQuadStorage … from Demo.demo.Customers as customers from Demo.demo.Orders as orders … { Demo.demo.Orders Northwind RDF View Definition create virtrdf:NorthwindDemo as graph iri (“http://^{URIQADefaultHost}^/Northwind”) { … northwind:Order (orders.OrderID) a northwind:Order as virtrdf:Order-Order ; northwind:orderDate orders.OrderDate as virtrdf:Order-order_date ; northwind:requiredDate orders.RequiredDate as virtrdf:Order-required_date ; … … } } northwind:has_customer northwind:Customer (orders.CustomerID) as virtrdf:Order-order_has_customer northwind:has_employee northwind:Employee (orders.EmployeeID) as virtrdf:Order-order_has_employee ; Shipped Via … Required Date Shipped Date Order Date Employee ID Customer ID Order ID

prefix northwind: <http://www.openlinksw.com/schemas/northwind#>

…

create iri class northwind:Order <http://^{URIQADefaultHost}^/Northwind/Order/%d#this> (in order_id integer not null) .

…

alter quad storage virtrdf:DefaultQuadStorage

…

from Demo.demo.Customers as customers

from Demo.demo.Orders as orders … {

Northwind Demo Database: Customer Table to RDF Entity Mapping Orders Table Germany Country 030 - 0074321 Phone 12209 Postal Code Obere Str. 57 Address Berlin City 030 - 0076545 Sales Represe-ntative Maria Anders Alfreds Futterkiste ALFKI Fax Contact Title Contact Name Company Name Customer ID companyName contactName contactTitle address city PostalCode country phone fax Alfreds Futterkiste Maria Anders Sales Representative Obere Str. 57 Berlin 12209 Germany 030-0074321 030-0076545 … Order/10643#this has_order Order/10692#this … has_order Customer/ALFKI#this prefix <http://demo.openlinksw.com/Northwind/> has_customer has_customer … ALFKI 10643 … ALFKI 10692 … Customer ID Order ID

Facilitate Information at Your Finger Tips Provide a Conceptual View of Logical Data Make the Conceptual Views concrete focal points of Data Access Identify Data Entities using URIs (Data Links) e.g http://demo.openlinksw.com/Northwind/Customer/ALFKI#this Identify Associations / Relationships with other Entities using URIs e.g http://www.openlinksw.com/schemas/northwind#has_order

Provide a Conceptual View of Logical Data

Make the Conceptual Views concrete focal points of Data Access

Identify Data Entities using URIs (Data Links) e.g http://demo.openlinksw.com/Northwind/Customer/ALFKI#this

Identify Associations / Relationships with other Entities using URIs e.g http://www.openlinksw.com/schemas/northwind#has_order

SQL-RDF Mapping Experiences Mapping is Non-Trivial Problems Start When Many Tables Map to the Same Thing Choice of URI Scheme Can Greatly Affect Optimization Possibilities

Mapping is Non-Trivial

Problems Start When Many Tables Map to the Same Thing

Choice of URI Scheme Can Greatly Affect Optimization Possibilities

What We Need Interop of Necessary SPARQL Extensions Visual Tools for SQL-RDF Mapping SQL-RDF Mapping Syntax Standardization Community Consensus on RDF Vocabularies

Interop of Necessary SPARQL Extensions

Visual Tools for SQL-RDF Mapping

SQL-RDF Mapping Syntax Standardization

Community Consensus on RDF Vocabularies

It is NOT about RDF vs. XML vs. SQL Web Services are for Transactions and App. Integration RDF is for Disparate Data Meshing, Discovery, and Drill Down/Analysis SQL is Forever

Web Services are for Transactions and App. Integration

RDF is for Disparate Data Meshing, Discovery, and Drill Down/Analysis

SQL is Forever

SQL-RDF Integration Value Enterprise: Alleviation of heterogeneous data integration challenges Public: A Whole Economy of Discoverable Linked Data and Data Mesh-ups Now: Full Text For All - Next: Analysis For All

Enterprise: Alleviation of heterogeneous data integration challenges

Public: A Whole Economy of Discoverable Linked Data and Data Mesh-ups

Now: Full Text For All - Next: Analysis For All

OpenLink Futures Commercial Deployment of SQL to RDF Mapping Towards Web-scale with Clustered RDBMS/Triple Store OpenLink Data Spaces (ODS) for Bootstrapping SemWeb Presence

Commercial Deployment of SQL to RDF Mapping

Towards Web-scale with Clustered RDBMS/Triple Store

OpenLink Data Spaces (ODS) for Bootstrapping SemWeb Presence

Additional Information http://virtuoso. openlinksw .com (general site) http://virtuoso. openlinksw . com/wiki/main/ (Open Source Edition Site) http://virtuoso. openlinksw .com/Whitepapers/index. htm ( OpenLink Data Spaces)

http://virtuoso. openlinksw .com (general site)

http://virtuoso. openlinksw . com/wiki/main/ (Open Source Edition Site)

http://virtuoso. openlinksw .com/Whitepapers/index. htm ( OpenLink Data Spaces)

Thank You!

Thank You!