Online Content Development Strategy: SCAmore


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Maximising Online Resource Effectiveness workshop: Online Content Development Strategy (session 5/8).

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  • Online Content Development Strategy: SCAmore

    1. 1. Introduction Development
    2. 2. Development strategy Session 7/8
    3. 3. The “open data” movement
    4. 4. The “open data” movement Linking Open Data project The goal is to extend the web by publishing various open data sets as RDF on the web and by setting RDF links between data items in different data sources. These RDF links then enable navigation from a data item within one data source to related data items within other sources using a semantic web browser. RDF links can also be followed by the crawlers of semantic web search engines, which may provide sophisticated search and query capabilities over crawled data. As query results are structured data and not just links to HTML pages, they can be used within other applications.
    5. 5. The “open data” movement
    6. 6. The “open data” movement Contains 4.7 billion triples, interlinked by around 142 million RDF links
    7. 7. Real metadata Resource description framework ‣ RDF is a generic "way" of using definitive metadata with web resources. ‣ RDF describes "things" (defined by uniform resource identifiers, URIs) by assigning properties and corresponding values—statements are known as "triples" consisting of [subject] [predicate] [object]. ‣ The predicate URI usually references a term in a standard metadata vocabulary, resulting in unambiguous meaning. ‣ Any part of the triple can be a URI and URIs can point to other URIs that can be read using HTTP and extended (or related) in other web resources, thus a scalable model and very flexible.
    8. 8. Linked data The New York Times and linked data As of 13 January 2010, The New York Times has published approximately 10,000 subject (people, organisations, locations) headings as linked open data under a CC BY license. ‣ This includes both RDF documents and human-friendly HTML versions. ‣ Each subject heading published on is associated with a Uniform Resource Identifier (URI) that is unique to that subject heading. ‣ When this URI is dereferenced in a web browser, an HTML document describing the subject heading is returned. Appending ".rdf" to the URI causes an RDF/XML document to be returned.
    9. 9. Linked data Build your own NYT linked data application EVAN SANDHAUS, March 30 2010 Now that we’ve published nearly 10,000 of our tags as Linked Open Data, you’re probably wondering what kind of cool applications you can build with this data. To help you get started (and since linked data applications are a little different from your average Web application), we thought we’d provide a sample application and detailed information about how we built it.
    10. 10. The “open data” movement
    11. 11. The “open data” movement A web of data ‣ web of data is generic (can contain any type of data) ‣ anyone can publish to web of data ‣ no constraints due to vocabularies (can create own as required) ‣ “things” connected via RDF links provide a global data graph which can be used for new resource discovery ‣ separation of data and presentation ‣ data is self describing (doesn't require additional information) ‣ HTTP and RDF are essentially the common API rather than many other proprietary heterogeneous models and interfaces ‣ open model, new stuff added easily
    12. 12. Open and linked data It's all semantics: open data, linked data and the semantic web Richard MacManus, ReadWriteWeb, 31 March 2010 Titti Cimmino put it nicely: Open Data is simply 'data on the web,' whereas Linked Data is a 'web of data.' However, the idea of Open Data is to turn it into Linked Data. As John S. Erickson pointed out, the first priority of (and its U.S. counterpart) is to publish lots of Open Data. The next step is to work towards linking it all up. This is already starting to happen. Answering a question I posed on Twitter, Kingsley Idehen confirmed that is currently a combination of Open Data and Linked Data.
    13. 13. Real metadata Microformats and RDFa ‣ Previously RDF statements were usually provided in separate .rdf files and were not widely used because of the extra effort required to produce. ‣ Microformats consist of informal vocabularies (not referenced in the document) that have been established by rapid user adoption, ease of use and desire to create richer semantics with embedded metadata. These are used with "class" attribute in <div> and <span> blocks or with “rel” in anchor <a …> tags. ‣ RDFa allows RDF statements to be included in ordinary HTML files using formally defined attributes within <span> blocks, with metadata vocabularies referenced in <head>.
    14. 14. Data integration Seamless use of data in a web page with desktop applications ‣ use of microformats tools to generate contact information in a web page ‣ viewing of web page containing microformats with an “aware” browser ‣ addition of data in the web page to desktop address book
    15. 15. RDFa How RDFa can help democratise web data Mark Birbeck, Google Tech Talk, June 2009 I’m using RDFa as a bit of a shorthand, because I’m saying really “embedded metadata”. I’m saying any way of actually putting information into the HTML page, rather than the traditional semantic web approach of having a “separate channel”. By separate channel, I’m saying you might have had an RDF-XML document, or even an RSS feed you could regard as a kind of semantic channel of information. But a channel of information that’s kind of distinct from the web page. Whereas what we’ve done with RDFa, and what the people behind Microformats were doing, basically the same goal, was actually make the HTML page the carrier of the metadata. And some times it’s carrying metadata about other things, and sometimes it’s carrying metadata about itself. So really, when I say RDFa (throughout this talk) I’m generally meaning those kind of solutions that allow you to embed metadata. The reason I’m favouring RDFa is because it’s very specific goal was to align itself with RDF, so it’s actually much more precise than Microformats, but the idea is the same that you embed information [in the HTML page].
    16. 16. RDFa How RDFa can help democratise web data Mark Birbeck, Google Tech Talk, June 2009 As for what it is, it’s a W3C standard now. It’s something we’ve been working on for four or so years—which I guess is quick for the W3C, we’ve been working on it for quite a long time, and it recently became a standard. And it’s very much about defining the syntax of how you embed information. It’s not really about saying what the vocabularies should be. Whereas Microformats is very much more about the vocabularies. And a good example of the flexibility of what that brings is when Google did its Rich Snippets, it just came out with its own vocabulary. It got a lot of stick for it from the Semantic Web community, or some there. But the point is that you were able to just come out with your own vocabulary, because RDFa is about the syntax and the structure, rather than the actual terms. So it’s very much in the spirit of the Web in the sense that it allows people to define their own vocabularies or reuse existing vocabularies, and put them into their documents however they see fit. So RDFa is a standard, and its goal is embedding metadata in pages.
    17. 17. An RDFa basics tutorial by Manu Sporny
    18. 18. Real metadata Microformats and RDFa: Adding Richer Structure To Your HTML Pages Brian Kelly (UK Web Focus), 25 March 2010 But before investing time and energy into using RDFa across an event Web site the Web manager will need answers to the questions: 1. What benefits can this provide? I’ve given one use case, but I’d be interested in hearing more. 2. What vocabularies do we need to use and how should the data be described? The RDFa Primer provides some example, but I am unsure as to how to use RDFa to state that, for example, Brian Kelly is based at the University of Bath, to enable structured searches of all speakers from the University of Bath. 3. What tools are available which can process the RDFa which we may chose to create?
    19. 19. Using the semantic web today Some semantic web tools RDFa toolkit ‣ Google’s RDFa tutorial ‣ hl=en&answer=146898 Marbles browser ‣ Operator plug in for Firefox ‣ DBpedia applications (try e.g. the relation finder) ‣
    20. 20. Practical exercise—development strategy headings Individually, for 10 minutes or so, write down the most important (first order) themes to be addressed in considering the ongoing development of your web site ‣ for each first order heading write down sub headings (second order) that would fall under that theme ‣ for each second order write down any key sub headings (third order) Share your headings with the group, adding anything else that is mentioned and relevant to you ‣ consider everything discussed in the workshop that is relevant and identify other additional items for discussion if they arise in your deliberations
    21. 21. Practical exercise—development strategy headings 1st order 2nd order 3rd order