New Paper: RDF & Layering Data
Leigh Dodds has posted a paper regarding layered data and RDF. Dodds introduces the paper thus: “Two years ago I wrote a short paper about ‘layering’ data but for various reasons never got round to putting it online. The paper tried to capture some of my thinking at the time about the opportunities and approaches for publishing and aggregating data on the web. I’ve finally got around to uploading it and you can read it here. I’ve made a couple of minor tweaks in a few places but I think it stands up well, even given the recent pace of change around data publishing and re-use. I still think the abstraction that it describes is not only useful but necessary to take us forward on the next wave of data publishing.” continued…
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Semantic Web Jobs: Data Tactics
Data Tactics is looking for a Semantic Applications Developer in Washington, DC. The post states, “Our Development Team works on exciting critical projects that enhance our nation’s national security efforts. We are currently seeking a Semantic Applications Developer for a full-time research and development position in the Washington D.C. or Aberdeen, MD area. The successful candidate will design and implement ontologies and semantic applications. If you have experience in algorithm development and would like to be an integral part of the creative team, check out the details and apply now.” continued…
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Semantic Web Jobs: The Virtue Group
The Virtue Group is looking for a Knowledge Management UIMA Developer for a six-month contract position. Requirements for the position include the following: “Identity and assess multiple knowledge sources to determine how they can be imported into a UIMAbased analytics environment. At least 3 years experience and in-depth understanding of UIMA based architecture concepts and NLP and text analytics. At least 3 years experience in building text analytics solutions including the development of annotators. Knowledge and implementation of information extraction and retrieval algorithms. Direct experience in Machine Learning Frameworks like WEKA, Apache Mahout.” continued…
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An Example of Simple Federated Queries with RDF
Bob DuCharme, author and speaker, has provided an excellent example of one of the benefits RDF has over XML. In his example, DuCharme shows how to perform a simple federated query with RDF across two different address books. He writes, “Once, at an XML Summer School session, I was giving a talk about semantic web technology to a group that included several presenters from other sessions. This included Henry Thompson, who I’ve known since the SGML days. He was still a bit skeptical about RDF, and said that RDF was in the same situation as XML—that if he and I stored similar information using different vocabularies, we’d still have to convert his to use the same vocabulary as mine or vice versa before we could use our data together.” continued…
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The Semantic Web is More than Linked Data
Mike Bergman recently gave a talk in which he discussed how “the pragmatic contributions of semantic technologies reside more in mindsets, information models and architectures than in ‘linked data’ as currently practiced.” He writes, “No matter how expressed, the idea behind all of these various [Semantic Web related] terms has in essence been to make meaningful connections, to provide the frameworks for interoperability. Interoperability means getting disparate sources of data to relate to each other, as a means of moving from data to information. Interoperability requires that source and receiver share a vocabulary about what things mean, as well as shared understandings about the associations or degree of relationship between the items being linked.” continued…
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Wolfram Alpha on Semantic Understanding & Democratized Data
Mastufa Ahmed recently interviewed Luc Barthelet, Executive Director of Wolfram|Alpha to learn more about the company’s search algorithm. Asked about what semantic web technologies Wolfram uses, Barthelet responded, “Wolfram|Alpha is not searching the Semantic Web per se. It takes search queries and maps them to an exact semantic understanding of the query, which is then processed against its curated knowledge base. The main technology used is Mathematica whose language is used to describe the semantic queries, and Mathematica technology is used to build up the natural language parser, the data curation pipeline and perform the data processing, computation and visualization.” continued…
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US Takes a Note from Ireland on Open Data
The US has launched open data standards that were originally developed in Ireland, John Kennedy reports. He writes, “The open data movement is in full swing and tools and standards created in Ireland are to prove pivotal to open data employed by the US government. It emerged today that agencies in the US Government have adopted a set of web tools and standards developed in Ireland by researchers at NUI Galway’s Digital Enterprise Research Institute (DERI). DERI’s technologies are being utilised by Data.gov, a portal developed to bring an unprecedented level of transparency to the US government. DERI’s research, which is funded by Science Foundation Ireland, focuses on enabling networked knowledge, using the latest semantic web and linked data technologies.” continued…
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Metadata, Big Data, and the Financial Sector
Bryan Bell of Cogito reports that financial companies are wise to turn to semantic metadata for better Big Data analytics. Bell writes, “Financial institutions are looking to linguistics and semantics as the best option for managing and taking advantage of their unstructured data, using it to better understand customers and competitors, to identify impactful market trends or simply to automate the process of answering common customer questions. As one Chief Data Officer put it, ‘We are the stewards of one of our firms’ most important assets, data, and we have been charged with bringing meaning to the data. I believe semantics offers a consistent, long-term capability and change in how data will be managed’.” continued…
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A Semantic Future
Luca Scagliarini recently shared his insight into why he believes semantics will play an important role in the future of technology. He writes, “As a kid growing up in Milan I was obsessed with two things: sports and the future… While other kids probably dreamed about having superpowers, my dreams were about a future that was more grounded in possibility than fantasy, about inventions that, with the right combination of genius and determination, were possible. Having my own personal television, one small enough to take anywhere and where I could watch anything I wanted, anytime, was something I knew would come eventually. And while the mini TV was an encouraging sign, the technology was still many years away.” continued…
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Simple namespace lookup
prefix.cc is a very handy little service that I use a lot.
If you work with RDF a bit, you get to know the commonly used prefixes for ontology terms, such as rdfs:label, foaf:Person, owl:sameAs etc.
While I can remember the most important predicates and classes from these ontologies, it’s rare for me to be able to remember accurately what the full namespace is.
prefix.cc, created by Richard Cyganiak from DERI, lets you type in the prefix, e.g. owl and returns the full namespace (e.g. http://www.w3.org/2002/07/owl#) that you can use in a PREFIX definition in your SPARQL query.
It also has a simple API.