Archive
Archive for August, 2009
Wolfram Alpha Interview
An interview with Xiang Wang of Wolfram Research in China, by Han Xu (Collin Hsu) of W3China fame.
Interesting excerpt:
Q: Since Wolfram|Alpha is dubbed ’smarter’ than traditional search engines, I wonder how much AI techniques are actually employed in the system? How is inference done? What is the provenance of each fact/claim? And what if there is a disagreement? For example, how it would represent information about Israel/Palestine area?
A: It’s much more an engineered artifact than a humanlike artificial intelligence. Some of what it does – especially in language understanding – may be similar to what humans do. But its primary objective is to do directed computations, not to act as a general intelligence. Wolfram|Alpha uses established scientific or other models as the basis for its computations. Whenever it does new computations, it’s effectively deriving new facts. About the controversial data you asked about, we deal in different ways with numerical data and particular issues. For numerical data, Wolfram| Alpha curators typically assign a range of values that are then carried through computations. For issues such as the interpretation of particular names or terms, like Israel/Palestine area issue mentioned in your question, Wolfram|Alpha typically prompts users to choose the assumption they want. We spend considerable effort on automated testing, expert review, and checking external data that we use to ensure the results. But with trillions of pieces of data, it’s inevitable that there are still errors out there. If you ever see a problem, please report it.
RDFa Primer Translated to (Traditional) Chinese
程龚 (Gong Chen) has published a Traditional Chinese translation of the RDFa primer, under the title “RDFa入門”.
August monthly review
Not too much movement in industry related with semantic technologies during the summer, I suppose they are getting forces to begin with new releases in September.
A new categorization tool, iSense SiteSeeker from Webgains ,has been launched. The Open Group, a consortium focused on standards and interoperability for enterprises, has announceed the availability of what it describes as industry standards for the adoption of SOA and cloud computing that consider semantic interoperability.
Other applications mainstream have announced the incorporation of semantic features, as “Spotify“ that have include these technologies to index the music everyone’s talking about to create the first constantly changing, dynamically updating the spotify laylist.
The area never rest is the search engines 0ne:
- Yebol has been launched. This search engine uses a combination of algorithms and human knowledge to build a revolutionary web directory for each search term. The Yebol engine clusters search results into groups of term-specific categories.
- Ingenuity Systems announced that their product, BD Biosciences, will enable its research customers to quickly and easily identify products and experimental design options most relevant to their research by means of semantic usage
Vídeo: El futuro de Internet de Simon Hergueta, 2a parte
Acabo de iniciar la publicación de un vídeo semanal en la barra lateral del blog. Intentaré que sea en español pero no siempre podrá ser así. Espero que os guste el primero, Filosofía pirata, por Gary Hall, con interesantes ideas sobre copyright, auto-pirateo y conocimiento.
Hubiera sido, sin duda este, la segunda parte de El futuro de Internet de Simón Hergueta, que publicamos junto a 4 vídeos imprescindibles para entender la web 3.0 y que acabo de ver en el blog de Enrique Dans, el primero de la serie.
Internet de las cosas, inteligencia artificial, singularidad, web semántica, naturaleza de la conciencia, con autores como Kurtzweill, Kevin Kelly y muchos otros sobre web 3.0, futuro de la web, de los que hemos hablado aquí en ocasiones y que trataré en Virtual Educa 2009, en Buenos Aires, en unos meses:
- Web semántica, Linked data web: últimos conceptos, tendencias y aplicaciones
- Linked data web: La web de los datos enlazados, mañana en Novadors
- Construcción colaborativa también de la realidad aumentada (o la web 3.0 social)
- Stream, fundamental en la web 3.0 y la próxima reconquista de Google
- Presentación: La tercera década de la web
El caparazón como mejor blog en la categoría de educación
últimas noticias
2009, Argentina, Buenos Aires, Ciencia, Planeta educativo, Spanish, Vídeos, Web 3.0, Web Semántica, YouTube, futuro, futuro internet, futuro web, internet, multimedia, video-documentales, videos-creacion, web3.0, zeitgeist evolución
Are Semantic Technologies losing the moment?
During the last years, Semantic Technologies have occupied an important place in most of the predictions done by main consultant companies when forecasting the future. We could say that “Semantic Technologies are the technologies of the future and always they will be”.
After several years explaining the concept and the great number of advantages of these technologies but with no commercial applications, the commercial implementations have arrived. It could be thought that this should have supposed an important boost in the number of news related to Semantic Technologies, but this is not happening and the number of references to Semantic Technologies is not increasing and even is decreasing (except in concrete moments as the celebration of important events as Sem Tech in San Francisco). So, what can we deduce?, Are these technologies losing the moment?, Is now and old fashion concept? Something was wrong?
From my point of view “NO”.
On the one hand, the “name” of semantic technologies has never be a clear one. Perhaps for the scientific community it was clear the exact meaning of the concept (and I’m not completely sure of that), but for the market is an ambiguous concept that sometimes has created too high expectations in IT companies.
On the other hand, when these technologies have matured they have been adopted by the IT systems in a smooth way and with different names : “knowledge systems”, “contextualization tools”…, but at the end they are semantic technologies (we can define semantic technologies in a quick way as those technologies oriented to use “concepts” instead of plain text). Beside this, other concepts very close to “semantic technologies” and that can be considered included among them are getting more famous. For instance, as it can be seen in the next graph, the number of times that the term “semantic web” appears in the web is decreasing but on the contrary, “linked data” is gaining positions, and even it could surpass it in some time (some companies use now to promote theis products) .
For this reason I think that Semantic Technologies are not declining but they are evolving and adopting a commercial form. In the future we will hear about “Virtual assistants”, “Contextualized interfaces”… and other kind of concepts that in the shadow are based on the present effort to standarize, promote and invest in Semantic Technologies.
English, Linked Data, Semantic Web, Spanish, Trends, semantic technologies
e-Readers and e-Textbooks: current reality and future possibilities
e-Readers and e-Textbooks: Current reality and future possibilities turned out to be easily the most interesting webinar I’ve ever attended. This Educause webinar featured Dr Jon T Rickman and Dr Roger Von Holzen from North West Missouri State University in the States and describing an initiative there around the evaluation of e-Readers and e-Textbooks over the past year.
Like other universities, North West Missouri State university had found itself under considerable pressure to deliver electronically, and the introduction of new devices in the marketplace has acted as a catalyst for an explosion in sales. There is focus on textbooks specifically in the relentless pursuit of cost reductions. NW Missouri State University is, in terms of its computing provision, unique as it has had a computer rental scheme in place for over two decades – the university charges $360 to its students for a wireless notebook computer.
They set about evaluating the e-Readers out in the marketplace and chose Sony Reader. The Kindle people at Amazon weren’t really interested in participating in the project. The Sony Reader looked attractive for a number of reasons. It was going to cost $250 per unit with bulk purchase (Kindle would have been $299 plus shipping). Sony will be transitioning to the EPUB format. The device has a 6 inch (15cm) display. Text is available in three sizes. It also uses electronic ink technology, which is almost like paper and retains good levels of readability even in strong sunlight, as well as having low power consumption and thus offering great battery life.
They had discounted the idea of offering a paper textbook rental service as the notional cost savings would have been cancelled out by the difficulties in running such a service.
The difficulties they ran into with e-Readers turned out to be considerable. For example, formatting content for e-Readers can take weeks. For campus-wide deployments there are currently not enough e-Reader-compatible e-Textbooks. Keyword searching and annotating are very important features for both students and academics, so despite the strong affinity that students have for hand-held devices, enthusiasm waned without those functions.
They also encountered a number of issues intrinsic to the e-Textbook format rather than the device. For example, the multiple components to the textbook including graphs and images, all have separate copyright. PDF format textbooks provide very restrictive options. And it turned out that what students really want from e-Textbooks is interactivity, animation and the ability to integrate content into other online tools.
They accepted that the whole area of e-Readers and e-Textbooks is subject to rapid change. It’s already the case, for instance, that keyword searching is now offered by e-Reader suppliers even though it wasn’t at the time of evaluation. Nevertheless, they were happy with their decision to move away from e-Reader provision, and instead set about making e-Textbooks available on the notebook computers that they were already renting out to students. They perceived that e-Reading devices and notebook computers are merginginto each others. They also felt uneasy that e-Readers aren’t the platform that authors are creating on – they’re actually creating the content on notebooks. With issues such as these in mind, it was hard to justify an additional $2million costs to add e-Readers to their raft of student services.
A Notebook approach to e-Textbook provision would also integrate with other software and services, including email and web access, thus meeting a key student requirement. And user support was already in place.
The delivery of a range of eTextbooks provided by five publishers to students via notebooks turned out to be simple and efficient. Students were able to complete the download of e-Textbooks with little support.
Rickman and Von Holzen don’t expect e-Textbooks to replace the traditional textbook any time soon. They foresee a transition, but expect academics to continue to select resources on the basis of content. In the meantime, they will continue their search for a new delivery platform, seeing the tablet PC with integrated eReader as an option. Overall, then, they’ve found that e-Readers simply don’t have the functionality to support the richness of e-Textbooks right now, and are more suited to a leisure-type read.
links for 2009-08-26
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At the end of July the Guardian held an internal hackday at their offices in King's Cross. They invited two engineers from BBC Radio's A&Mi department, Chris Lowis and David Rogers. We teamed up with Leigh Dodds & Ian Davis from Semantic Web specialists, Talis to produce an 'Interactive-MP-Media-Appearance-Timeline' by mashing up data from BBC Programmes and the Guardian's website.
Increased Transaction Allowances
Hi all – just a little snippet of news today.
We’ve been busy working to keep up with the increased demand for Opencalais services. A lot of engineering going on in the background around scalability, performance and reliability.
The good news is that it is all paying off. Over the last three months we’ve achieved 100% uptime while improving performance and a delivering a number of functional improvements in the service - all while seeing growing utilization.
One result of our recent work is that the system is more efficient and scalable. Given our goal of connecting the world’s content – scalability is more than a little important.
And we’d like to share some of those improvements with the OpenCalais community. While we can’t offer everyone unlimited usage – we can turn the dial up a bit. So – effective immediately we’ve increased the daily transaction allowance for OpenCalais to 50,000 transactions per day – a 25% increase.
Of course, OpenCalais continues to be offered at no charge for commercial or non-commercial use. You don’t need to serve ads, embed links you don’t want or anything else. All we ask is that you share your stories of how you’re using OpenCalais with the world.
We’ve signed quite a number of agreements for OpenCalais Professional recently (same service, more transactions and an SLA). Based on what we’re hearing from our users we’re also working on some new pricing models for startups and (enormously) high volume media monitoring applications – more to come soon. If you’re interested in our Professional solutions please drop us a note at professional@opencalais.com and we’ll get back to you right away.
Minería de datos y sentimientos en la web, herramientas clave en la evaluación de actuaciones en los social media
Aunque me cuesta aceptar que el adjetivo “sentimental” sea el más apropiado para definir sistemas más cualificados – completos para medir el “zeitgeist”, el estado de opinión sobre determinadas cuestiones en la web, quería hablaros de una serie de desarrollos que van, en los últimos tiempos, en ese sentido.
Hace tiempo que la reputación digital, su medición para empresas que se sienten vulnerables en el nuevo entorno apunta como uno de los negocios más claros en la red y creo que lo que viene a continuación tiene que ver con ello. También con el análisis de tendencias en mercados dinámicos, más cambiantes y probablemente predecibles que nunca.
Le llamábamos hasta ahora “datamining”, recogida y procesamiento de datos como muestra de la inteligencia colectiva, pero parece que ahora las tecnologías van siendo cada vez más capaces de captar sus matices:
Así, el NYT titula un reciente artículo de este modo: “Minería de sentimientos, no de hechos, en la web“. Y nos habla de herramientas comerciales, destinadas a empresas, como Scoutlabs, Jodange (que incorpora datos de más de 450,000 fuentes, incluyendo medios digitales masivos, blogs, twitter, etc… y trabaja en la elaboración de predicciones de futuro) Newssift, etc…
Para usuarios de a pie, Tweetfeel, Twendz y Twitrratr permitirán tomar el pulso a Twitter, la que ya se denomina el alma de la web, significando versiones simplificadas y gratuitas de las anteriores que podéis probar para una visión práctica de todos estos nuevos conceptos.
RWW listaba hace unos días nuevos servicios: Syosmos, Backtype, Evri y su API de medición sentimental, etc…
Captura de pantalla Evri
Faltan todavía definiciones de inteligencia, sentimiento y su interacción que den sentido a cualquier análisis serio. Leía ayer mismo al respecto un interesante artículo que podríamos pensar en el contexto de la relación entre desarrollos tecnológicos y ciencias sociales, ¿Tienen futuro las ciencias sociales?…. ¿Están fundamentados de forma teórica ciertos desarrollos tecnológicos que se deberían partir de definiciones conceptuales desde distintas disciplinas no tecnológicas?
Así, Evri y su API sentimental, parten de análisis contextuales, muy ricos en cuanto a su carácter de semánticos, pero sin profundizar demasiado en la psico-sociología de la opinion, mientras que otros, como Bo Pang, investigador en Yahoo intentaba con “Opinion Mining and Sentiment Analysis,” uno de los primeros libros académicos acerca del análisis sentimental de los datos, aportan una mirada mucho más profunda al tema:
“El software que desarrolla incluye distintos filtros de mejora cualitativa de los resultados, como la polaridad (carácter negativo-positivo del estado de opinión), la intensidad (¿cuál es el grado de emoción que se expresa?) y la subjetividad (¿cómo de parcial o de imparcial es la fuente que expresa las opiniones?). Un ejemplo claro sería la preponderancia de adjetivos como signo de subjetividad…”
En fin… sea como sea, más allá de lo descriptivo, creo que este tipo de instrumentos serán los que ayuden a definir cuestiones como el ROI (retorno de la inversión), cuando nos planteamos iniciativas de intervención en la reputación digital de nuestros clientes.
Creación y gestión de canales de identidad corporativa en los Social Media e incluso la creación de comunidades, son acercamientos actuales al tema y ámbitos en los que creo que florecerá la aplicación de este tipo de análisis como forma de evaluación o mejora.
últimas noticias2009, API gravity, Application programming interface, Control social, Evolución, Evri, Jodange, Knowledge Management, Marketing, Planeta educativo, Psicologia, Redes sociales, Sentiment Analysis, Sociedad de la conversacion, Spanish, Web Semántica, WordPress, backtype, blogging, cibercultura, cognitivismo, comunidades, cultura 2.0, curiosidades, datamining, desarrollo-web, empresa, empresa 2.0, evaluación, filosofía, filtrado de contenidos, futurismo, herramientas para blogs, herramientas semánticas, identidad digital corporativa, innovación, inteligencia colectiva, lifestreaming, marca, medios, medios sociales, reputación digital, roi, sociología, software, twitter, web3.0, zeitgeist, zeitgeist evolución
Lecture notes on AI metaheuristic algorithms
Sean Luke has made available an open set of lecture notes on metaheuristics algorithms, Essentials of Metaheuristics. Sean defines a metaheuristic as
“A common but unfortunate name for any stochastic optimization algorithm intended to be the last resort before giving up and using random or brute-force search. Such algorithms are used for problems where you don’t know how to find a good solution, but if shown a candidate solution, you can give it a grade. The algorithmic family includes genetic algorithms, hill-climbing, simulated annealing, ant colony optimization, particle swarm optimization, and so on.”
Such AI algorithms are also often called weak methods, but I like the term metaheuristic better.
The lecture notes look great and the chapters can be used independently for self study or to augment topics in a graduate or undergraduate course. Thanks Sean!
(via Don Miner.)
RDF: JFDI
Jeni Tennison has written a wonderfully insightful post on RDF and HTML5. She caps it off with two sentences that every RDF advocate needs to pay attention to:
- so why not just stop arguing and use the spare time and energy doing?
- so why not demonstrate RDF’s power in real-world applications?
That’s all there is to say really. Stop waving hands around promising things will be great if only you did X. Get out there and build some things that actually make a difference.
RAEng report on Social, legal and ethical issues of autonomous systems
RAEng report on Social, legal and ethical issues of autonomous systems
The Royal Academy of Engineering has released a report on the social, legal and ethical issues involving autonomous systems — systems that are adaptive, learn and can make decisions without the intervention or supervision of a human.
The report, Autonomous Systems: Social, Legal and Ethical Issues (pdf), was based on a roundtable discussion “from a wide range of experts, looking at the areas where autonomous systems are most likely to emerge first, and discussing the broad ethical issues surrounding their uptake.”
While autonomous systems have broad applicability, the report focuses on two areas: transportation (e.g. autonomous road vehicles) and personal care (e.g., smart homes).
“Autonomous systems, such as fully robotic vehicles that are “driverless” or artificial companions that can provide practical and emotional support to isolated people, have a level of self-determination and decision making ability with the capacity to learn from past performance. Autonomous systems do not experience emotional reactions and can therefore perform better than humans in tasks that are dull, risky or stressful. However they bring with them a new set of ethical problems. What if unpredicted behaviour causes harm? If an unmanned vehicle is involved in an accident, who is responsible – the driver or the systems engineer? Autonomous vehicles could provide benefits for road transport with reduced congestion and safety improvements but there is a lack of a suitable legal framework to address issues such as insurance and driver responsibility.
…
The technologies for smart homes and patient monitoring are already in existence and provide many benefits to older people, such as allowing them to remain in their own home when recovering from an illness, but they could also lead to isolation from family and friends. Some users may be unfamiliar with the technologies and be unable to give consent to their use.”
The RAEng report recommends “engaging early in public consultation” and working to establish “appropriate regulation and governance so that controls are put in place to guide the development of these systems”.
rdf:SeeAlso Autonomous tech ‘requires debate’; Scientists ponder rules and ethics of robo helpers; Robot cats could care for older Britons.
(via Mike Wooldridge)
AI, Agents, English, Semantic Web, Technology Impact, social media
Twitter to add support for geogtagging tweet locations
Twitter is adding support for geotagging tweets to their API which will make Twitter a richer source of real-time news. The Twitter blog reports:
“Twitter platform developers have been doing innovative work with location for some time despite having access to only a rudimentary level of API support. Most of the location-based projects we see are built using the simple, account-level location field folks can fill out as part of their profile. Since anything can be written in this field, it’s interesting but not very dependable.
We’re gearing up to launch a new feature which makes Twitter truly location-aware. A new API will allow developers to add latitude and longitude to any tweet. Folks will need to activate this new feature by choice because it will be off by default and the exact location data won’t be stored for an extended period of time. However, if people do opt-in to sharing location on a tweet-by-tweet basis, compelling context will be added to each burst of information.”
This opens up lots of interesting opportunities but there is still room for geotagging from conent. There are more than one relationship between a Tweet (or any utterance) and a location. They include both were the tweeter was when it was issued but also the location of the event or object that’s the tweet’s subject.
For example, the Baltimore police use twitter to inform the press and public about about significant crimes, major traffic problems and other events. There are 10-15 tweets a day in this stream, all sent by an officer in the BPD Public Affairs department. The majority of the tweets mention a location (e.g., “Shooting on Lafayette Ave, Suspect in Police custody, handgun recovered.”) but are, I assume, sent from Public Affairs office. Baltimore city covers a large area, more than 80 square miles. Many residents or reporters will be interested only in events in or effecting the neighborhoods where they live, work or pass through when commuting.
I also wonder if there are more opportunities for Twitter to add semantic metadata to Tweets via their API.
UMBC tops US News and Word Report list of rising national universities
I’m very gratified to see UMBC recognized in the U.S. News and World Report annual report on America’s Best Colleges. UMBC was ranked first on the list of “up-and-coming” national universities and fourth on the list of national universities committed to undergraduate education. UMBC was actually tied for fourth with Stanford on the list of schools most committed to undergraduate teaching, but I think an appropriate tie breaker would be chess and UMBC has always dominated Stanford in the Pan American Intercollegiate Team Chess Championship.
Most of the details are only available if you purchase the report, but there are stories in today’s Baltimore Sun and Washington Post.
New SW Use Case by KISTI
Kisti, in Korea, has provided a W3C Semantic Web Use Case on the OntoFrame 2008 semantic portal service on academic research. The goal of the service is to provide connection, fusion, and analysis services on academic research information to enable scientists to effectively obtain information. The portal, using technologies like RDF, OWL, or SPARQL, does more than improved search; it also provides a visualization based interface to convey data on the identification of leading researchers or research institutes for a particular topic, main research focus of a given researcher, researcher publication network, statistics of accomplishments in a particular topic area, and geographical distribution of researchers specialized in a given topic.
The Y Combinator Future of Journalism Challenge Spells Opportunity
The Y Combinator's 'Future of Journalism' challenge presents a great opportunity for OpenCalais developers. The seed-stage venture group has turned the conventional approach to journalism on its head, calling for sustainable online business ideas that can also support journalistic endeavors.
They ask: What would a content site look like if you started from how to make money—as print media once did—instead of taking a particular form of journalism as a given and treating how to make money from it as an afterthought?
Read more about it here, and remember how OpenCalais can help:
OpenCalais uses natural language processing (NLP) to “read” an article, extracting the ‘who, what, when, where and how’ from the story. Breaking content down into its basic elements makes it easier to manipulate – automating the creation of topic hubs and microsites – and improves its search relevance. With OpenCalais, publishers can:
- Automate: Automatically tag the entities, facts and events in content to increase its value.
- Enhance: Enrich content with open data from Wikipedia, Shopping.com, Geonames and more.
- Engage: Optimize the user experience, increase engagement and drive repeat visits.
- Extend: Increase reach to new search engines, aggregators, ‘related stories’ apps and more.
- Connect: Compete in tomorrow’s media ecosystem of enriched and interconnected content
From Chaos, Order: SKOS Recommendation Helps Organize Knowledge
Today W3C announces a new standard that builds a bridge between the world of knowledge organization systems - including thesauri, classifications, subject headings, taxonomies, and folksonomies - and the linked data community, bringing benefits to both. Libraries, museums, newspapers, government portals, enterprises, social networking applications, and other communities that manage large collections of books, historical artifacts, news reports, business glossaries, blog entries, and other items can now use Simple Knowledge Organization System (SKOS) to leverage the power of linked data. The Semantic Web Deployment Working Group also published today two Group Notes with the Recommendation, updating the SKOS Primer and SKOS Use Cases and Requirements.
Vote for My Panels & Twine at SXSWi 2010
The panel picker for SXSWi went live this morning, and Twine has propsed several submissions. Browsing through the huge list of proposals (over 2200), it’s clear that the Semantic Web will be popular...
Conferences, English, Events, Nova Spivack, Radar Networks, SXSW, SXSW2010, SXSWi, Semantic Web, panel picker, panels, search, semantic search, semantics, twine, visualization
WebFinger: a finger protocol for the Web
Maybe WebFinger will succeed where others have failed. At what? At providing a simple handle for a person that can be easily used to get basic information that the person wants to make available. The WebFinger proposal is to use an email address as the handle.
WebFinger, aka Personal Web Discovery. i.e. We’re bringing back the finger protocol, but using HTTP this time.
Techcrunch has a post on this, Google Points At WebFinger. Your Gmail Address Could Soon Be Your ID with some background.
There’s some excitement around the web today among a certain group of high profile techies. What are they so excited about? Something called WebFinger, and the fact that Google is apparently getting serious about supporting it. So what is it?
It’s an extension of something called the “finger protocol” that was used in the earlier days of the web to identify people by their email addresses. As the web expanded, the finger protocol faded out, but the idea of needing a unified way to identify yourself has not. That’s why you keep hearing about OpenID and the like all the time.
The current focus of the WebFinger group is on developing the spec for accessing a user’s metadata given their handle. Using RDF and the FOAF vocabulary should be a no-brainer for representing the metadata.
New Textbook: Foundations of Semantic Web Technologies
Holding the printed version of our new book in hand – that’s quite a sense of achievement: Pascal Hitzler, Markus Krötzsch, Sebastian Rudolph, Foundations of Semantic Web Technologies, Chapman & Hall/CRC, 2009. And I think we made a difference with this book, since it not only provides intuitive introductions to RDF(S), OWL 1+2, RIF, SPARQL, but also an in-depth treatment of the formal semantics (including tableau algorithms) – plus applications, tools, a bit on ontology engineering, OWL+Rules, conjunctive queries, and exercises+solutions. Ready-to-use for self-study or teaching. We will also collect slides on the book webpage.
Since our German book has become a widely used textbook for university courses in the German speaking countries, we expect no less from the new book: The didactic rationale is basically unchanged, but we cover much more material, and have obviously brought the contents up to date.
And we’ve already found a first typo: The heading to Section 1.4 reads: “Semanic Web Technologies.” Is that a Freudian Slip?
URIs as GPS coordinates for knowledge and information
How I Explained REST to My Wife popped up on Hacker News today. While the way Ryan Tomayko frames his description of http protocols stikes many (invcluding me) as sexist, it’s well written and illuminating.
What hit me like a two-by-four up side the head was his characterization of URIs as being like “GPS coordinates for knowledge and information”. Great analogy!
He’s not really talking about the Semantic Web, but he ought to be. I think we should steal borrow his analogy and use it in explaining the central role URIs play for us.
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