Semantic Web

Tom Murphy's picture

Linked Data - An Introduction

I keep hearing the term Linked Data, but what does it mean?

More or less what it says. All the data on the Internet linked together.

And that is important to me because…?

Your company, like everyone else’s company has a number of separate processes going. Accounts, marketing, HR, government compliances, legal issues, transport considerations. The information that pertains to each process is stored for convenience in separate databases. These databases are associated with the various applications that are used to create them. SAP for accounts, various spreadsheet formats, and document pages.
All contain information vital to the running of your company. All contain information which is mutually inaccessible to each other.

It has worked so far because we have had the human workaround. If a report has to be written for the quarterly board meeting, then someone has to get the information from each of these ‘data silos’ separately and spend a goodly amount of time and energy on finessing the disparate contents into something understandable and useful to act as a basis for a fruitful discussion.

With Linked Data technology running on your system, you ask your system for the information you want in the format you want. The computer itself works out what is relevant and useful. Linked Data enables the various databases to talk to each other and work out what is needed.

John Breslin's picture

Tales From the SIOC-O-Sphere #10

SIOC is a Social Semantic Web project that originated at DERI, NUI Galway (funded by SFI) and which aims to interlink online communities with semantic technologies. You can read more about SIOC on the Wikipedia page for SIOC or in this paper. But in brief, SIOC provides a set of terms that describe the main concepts in social websites: posts, user accounts, thread structures, reply counts, blogs and microblogs, forums, etc. It can be used for interoperability between social websites, for augmenting search results, for data exchange, for enhanced feed readers, and more. It's also one of the metadata formats used in the forthcoming Drupal 7 content management system, and has been deployed on hundreds of websites including Newsweek.com.

As part of our dissemination activities, I've tried to regularly summarise recent developments in the project so as to give an overview of what's going on and also to help in connecting interested parties. It's been much too long (over a year) since my last report, so this will be a long one! In reverse chronological order, here's a list of recent applications and websites that are using SIOC:

Tom Murphy's picture

Riposte To Shirky's Semantic Smackdown From 2003

In normal circumstances, I have the highest regard for Clay Shirky. A copy of his book "Here Comes Everybody" is making its way to my great delight to the top of my reading stack. His talk at the London School of Economics is a classic lesson in presentation and delivery.

However, his article on the Semantic Web is a bit of a shocker. He begins the the article asking "What is the Semantic Web good for?", a phrasing strongly reminiscent of Edwin Starr asking "War: what is it good for?" which of course demands the response “Absolutely nothing.”

To save us all from chanting in unison he provides us with his own answer. "The Semantic Web is a machine for creating syllogisms." Even for 2003, when his article was written, that wasn't true. The stated aim has always been to make information more relevant by making it more meaningful and more accessible.

John Breslin's picture

Can Facebook Open Graph Help Resurrect The Structured Blogging Initiative?

In April 2010, both Facebook and Twitter announced separate efforts towards integrating semantic metadata into their core services. Facebook have launched their Open Graph protocol, which allows external site owners to markup their content using Facebook-defined schemas, such that these enriched content items can then be used for metadata import into news feeds, profiles, etc. Twitter have described their forthcoming Twitter Annotations extension, whereby users of their API will be able to attach arbitrary metadata to any microblog post, subject to an overall size limit for the metadata payload. (I've already mentioned Twitter Annotations in a previous post.)

Tom Murphy's picture

Wanted: "Joined-Up" News Search For Grown-Ups Via Linked Data

All the information in the world and beyond falls into one of three categories.

  • What we know
  • What we know we don't know
  • What we don't we don't know

    Sounds very much like the poetry of Donald Rumsfeld, but the idea of separated knowledge predates him all the way back to the time of Plato's Dialogues. When it comes to the news - the information updates that inform our knowledge of the world and our specific interests - there are two other conditions to take into consideration: the expected and the unexpected.

    Expected news is the regular features and updates that we get from feature writers, blogs that share our views, and is largely a comforting place to be: something new to consider on a regular basis but in a familiar continuum of form and style. Updates aren't really more news, but just more information on a topic. Our knowledge is expanded in a staged manner, a bit like taking a walk along an unfamiliar path in a familiar piece of countryside.

John Breslin's picture

Gerry McKiernan - "The Future of Research and Scholarship - Open, Social, Semantic, Mobile"

I attended an invited talk at NUI Galway last year by Gerry McKiernan (blog, homepage) from Iowa State University. Gerry is an Associate Professor at the University and has been working in the area of science / technology libraries since 1987. His slides are available here.

John Breslin's picture

Forums, the Semantic Web, and SEO (Version 2)

Why add semantic metadata to forums?

  • To increase the relevance of search results
  • To make search results more useful (embedding information on the numbers of posts or authors in a discussion, the last post date, ratings, topics, etc.)
  • To help link together topics across forums
  • To collect a person's contributions across sites
  • To go beyond what is possible with RSS (limited items, cannot fully describe forum structures)

Search engines are starting to identify structures

John Breslin's picture

Forums, the Semantic Web, and SEO

Edit: A new, longer version of this post is available here.

I think we need to see some developments for forums and bulletin board software regarding the Semantic Web. Yahoo SearchMonkey and Google Rich Snippets are already indexing semantic content from the Web, and you can be sure that Bing will go the same way if recent developments are anything to go by.

John Breslin's picture

Favourite social media tool from 2008, and the one to watch...

(Originally posted at Krishna De's BizGrowthNews.com.)

The two tools that I've found most useful for sharing information online this year would have to be the "Twi-ns" (non-identical!): Twitter and Twine. I'll talk about Twitter as my "favourite social media tool of 2008" and share some details of Twine, describing what I hope to use both tools for in 2009.

Most effective online media channel in 2008

John Breslin's picture

boards.ie SIOC Data Competition moves start date to 1st September

Signups are now being accepted for the boards.ie SIOC Data Competition, and data sets will be made available to verified accounts for download from the 1st September 2008.

Syndicate content