Practical Technology Showcase Summary — 2022-05-06

[Carolinei]

Virtuoso Reasoning and Inference capabilities

The notion of a Semantic Web is “deceptively simple,” just like the real-world. It can be demonstrated using very simple examples, while still remaining somewhat tricky to comprehend.

The following is a demonstration of Knowledge Graph based reasoning and inference by Kingsley Idehen, using book recommendations from Barrack Obama and Oprah Winfrey via ReadThisTwice.

We start with two book recommendation pages, each comprising a personal recommendation:

1. Barack Obama
2. Oprah Winfrey

Loading the Raw Data
Using SPARQL via the OpenLink Structured Data Sniffer (OSDS) Browser Extension, we extract, transform, and load (ETL) the Knowledge Graph embedded in each page.

Challenge
At this juncture, you have a Knowledge Graph that manifests as a collection of Entity Relationships constructed from hyperlinks, but with an obvious flaw: Barack Obama and Oprah both recommend “Becoming” (by Michele Obama), but that’s nowhere to be found in the Knowledge Graph.

Solution
Use an inference rule to dynamically correct the problem spotted in the Knowledge Graph. No coding adventures required!

Here are two pages that demonstrate how such an inference rule solves this Knowledge Graph problem:

1. Without reasoning and inference
2. With reasoning and inference

How was this done?
Simply telling the Virtuoso instance to treat the the schema:name property (relation) as “uniquely identifying” is enough. Once that is established, the Knowledge Graph dynamically solves the problem through an ability to compute the meaning (i.e., semantics) of “uniquely identifying”. (Note: A “unique identifier” is an identifier that identifies one and only one entity, but this must not be confused with an identifier which is the one and only identifier of an entity.)

Important point
Virtuoso leverages its high-performance DBMS engine to deliver powerful reasoning and inference that scales to support the demands of the Web.

Here’s a unique hypermedia document regarding this demo, generated courtesy of our Twingler Smart Agent, for future reuse and recall.

Related Demos and Other Info

• Our recently released, Gradle-packaged collection of Java samples on GitHub also includes easy to understand custom reasoning and inference examples that leverage SPARQL as the rules definition language, Learn More…

• Demonstration of built-in reasoning and inference using British Royal Family relations

• Demonstration of custom inference and reasoning using British Royal Family Relationships

• Harmonizing Disparate RDBMS Data using Virtuoso’s built-in Reasoning and Inference functionality

• Exploiting the Benefits of Reasoning & Inference using various RDF Frameworks and OpenLink Virtuoso 8.x

• Creating Custom Inference Rules using the SPIN Vocabulary and Virtuoso 8.0

• Using Custom Inference Rules to dynamically generate Linked Data from Open Data

• Virtuoso Onboarding Page

About Virtuoso

• Virtuoso product page is live on LinkedIn.
• LOD Connectivity License for ODBC and JDBC apps to the LOD Cloud Knowledge Graph
• Exploit the powerful Enterprise Knowledge Graph technology provided by our Virtuoso Platform, by taking advantage of our current collection of Special Offers
• Download Virtuoso for On-Premise installation and use
• OpenLink Virtuoso Pay-As-You-Go (PAGO) from the AWS Cloud
  • Virtuoso 8.3.3323 (PAGO) Edition for the AWS Cloud
  • Virtuoso 8.3.3323 (BYOL) Edition for the AWS Cloud
• OpenLink Virtuoso Pay-As-You-Go (PAGO) from the Microsoft Azure Cloud
  • Virtuoso 8.3.3319 (PAGO Edition) for the Microsoft Azure Cloud
  • Virtuoso 8.3.3319 (BYOL Edition) for the Microsoft Azure Cloud
  • Detailed usage guides for Azure
    • Azure OpenLink Virtuoso Ubuntu PAGO VM — with FREE 30 Day Evaluation
    • Azure OpenLink Virtuoso Ubuntu BYOL VM

About OpenLink Knowledge Graph Productivity Tools

• Free OpenLink Structured Data Sniffer (OSDS) Browser Extension for Google Chrome, Microsoft Edge, Mozilla Firefox, Opera, and Vivaldi (with a build planned for Apple Safari)
  • Find out more on the Chrome Browser Extensions Store
• Twingler — A Smart Agent solution for transforming threaded content into Knowledge Graph nuggets, for easy reuse and recall.

About OpenLink Data Access Drivers

• Universal Data Access Drivers — Entry-level offers on high-performance drivers/providers/connectors for ODBC, JDBC, ADO.NET, and OLE DB
• Download Free Trials of our Secure and High-Performance ODBC & JDBC Data Access Drivers (or Connectors) for Oracle, SQL Server, DB2, MySQL, PostgreSQL, Sybase, Informix, Ingres, and 3rd Party ODBC or JDBC Data Sources

Prior Posts Archive

• Weekly Summary 2022-04-22
• Weekly Summary 2022-04-08
• Weekly Summary 2022-03-25
• Weekly Summary 2022-03-18
• Weekly Summary 2022-03-11
• Weekly Summary 2022-02-25
• Weekly Summary 2022-02-11
• Weekly Summary 2022-02-04
• Weekly Summary 2022-01-28
• Weekly Summary 2022-01-21
• Weekly Summary 2022-01-14
• Weekly Summary 2022-01-04
• Archived listing of weekly summaries from January to December of 2021