Triplestores are Database Management Systems (DBMS) for data modeled using RDF. Unlike Relational Database Management Systems (RDBMS), which store data in relations (or tables) and are queried using SQL, triplestores store RDF triples and are queried using SPARQL.

A key feature of many triplestores is the ability to do inference. It is important to note that a DBMS typically offers the capacity to deal with concurrency, security, logging, recovery, and updates, in addition to loading and storing data. Not all Triplestores offer all these capabilities (yet).

Triplestore Implementations

Triplestores can be broadly classified in three types categories: Native triplestores, RDBMS-backed triplestores and NoSQL triplestores. Read more



Ecosystem image via Shutterstock

As the Semantic Web Blog recently noted, 3RoundStones’ Callimachus Enterprise emerged as the winner of the Top Semantic Technology Start-up competition that was held at the Semantic Tech & Business Conference (#SemTechBiz) in San Francisco a few weeks ago. The commercially supported Linked Data Management system, now being piloted by eight companies, will this summer be released to the general public as Version 1.0.

Callimachus Enterprise is distinguished not only by its technology, but by CTO David Wood’s presentation that spoke to the real business needs of the enterprise today – including rapidly demonstrating value, in its case around exposing, connecting and visualizing disparate enterprise content – and also in that it provides a way for organizations to deal with their enterprise information in an entirely cloud-based solution. It leverages the Amazon cloud.

“A lot of companies are using cloud-based solutions for travel and expense tracking,” says CEO Bernadette Hyland. “But this is the beginning of a new wave.”

Read more

[Editor's Note: With the San Francisco-based Semantic Technology Conference just two weeks away, we are going to feature a few of the the new and important products to be discussed at the conference. We will focus on a few of the products and tools that will be featured at the event. The full conference program is available here.]

At SemTech, representatives from Oracle will demonstrate the semantic aspects of Oracle database in two sessions:

Read more

I have often heard people lament the lack of federated systems in the Semantic Web. Certainly, the use of URIs allows data from many different sources to link together seamlessly, and the judicious use of assertions like owl:sameAs can help fill in the gaps, but if a developer wants to do something interesting with data from more than one SPARQL endpoint, they must draw it all in from various locations before merging and linking it all locally. Where is the "webiness" in this data? Wasn’t SPARQL supposed to do all of the processing work for us? Why do we need to do this work manually?

Read more

This interview with Eric Miller, President of Zepheira was conducted by Golda Velez. http://zepheira.com

SR: Eric, let me ask your advice. The Semantic Web is interesting, exciting, promising. So say I’m a developer, how do I get involved with it? Or suppose I have a tech company, how do I get work in this field?

Read more