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© Louise Docker <br />Towards a RESTful Service Ecosystem<br />Perspectives and Challenges<br />Markus Lanthaler | Christian Gütl<br />Graz University of Technology<br />

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© Matteo!<br />How much time do you spent reformatting data?<br />

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The Web has liberated information from its physical containers<br />©Alexandre Duret-Lutz<br />

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Average information worker wastes 3.8 hours/week reformatting data<br />© Irina Slutsky<br />

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The Problem<br />Agenda<br /><ul><li>The Problem

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SOA: A first attempt

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REST – the better alternative?

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Towards a RESTful Service Ecosystem

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Service Interface Description

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Semantic Annotation

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Service Discovery and Composition</li></ul>© Luis de Bethencourt<br />

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The Problem<br />The Web still resembles its physical predecessors… just as the first cars did<br />

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The Problem<br />SOA: A first attempt<br />SOA: first attempt to streamline business processes<br />© Jurvetson<br />

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SOA: A First Attempt<br />SOAP + WSDL + UDDI<br />© Capture Queen<br />

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SOA: A First Attempt<br /> SOAP ≈ RPC not Web-friendly<br />© jvs11<br />

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SOA: A First Attempt<br />REST – The Better Alternative?<br />REST (Representational State Transfer)specifically developed for the Web<br />© longhorndave<br />

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REST – The Better Alternative?<br />SOAP<br />REST<br />© Michael Glasgow<br />

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REST – The Better Alternative?<br />Service Interface Description<br />REST typically has just ahuman-readable documentation<br />

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Service Interface Description<br />Most interesting approaches are hRESTS and WADL<br />WRDL<br />NSDL<br />SMEX-D<br />Resedel<br />RSWS<br />WDL<br /> WADL: closely related to WSDL<br />hRESTS: microformats for HTML doc.<br />© Clever Cupcakes<br />

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Service Interface Description<br />Semantic Annotation<br />Syntactic description is not enough<br />Semantic annotation ofdata and service behavior<br />© aka Kath<br />

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Possible to create matching semantic stacks for SOAP and REST<br />Semantic Annotation<br />Ontology, e.g. WSMO-Lite<br />annotations point to<br />Semantic annotation<br />SAWSDL<br />MicroWSMO<br />SA-REST<br />SBWS<br />extends<br />extends<br />extends<br />Service interface description<br />WSDL<br />hRESTS<br />WADL<br />

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Service Discovery and Composition<br />Centralized?<br />Discovery<br />Decentralized?<br />© Kai Markus Schreiber<br />

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We are working on a holistic frameworkcombines knowledge of the crowd and computer processing<br />© Dave Jay<br />

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Thank you<br />© 2010, Markus Lanthaler. Some Rights Reserved.<br />http://creativecommons.org/licenses/by-nc-sa/3.0/ <br />

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Feedback/Questions?<br />Markus LanthalerGraz University of Technology<br />Markus.Lanthaler@student.TUGraz.at<br />

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Bonus Slides<br />

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Service Interface Description<br />http://search.yahooapis.com/NewsSearchService/V1/newsSearch?appid=YahooDemo&query=dubai&results=2&language=en<br />

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Service Interface Description<br />Payload description: XML/RelaxNG schemas, Internet Media Types, ..?<br />© aka Kath<br />

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Semantic Annotation<br />Data mediation/integration is a common and still open problem<br />© mdid<br />

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Semantic Annotation<br />Service Discovery and Composition<br />Use lifting/lowering schemasTranslation between service’s native and ontology’s format<br />© Arenamontanus<br />

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O/X impedance mismatch<br />© Luis de Bethencourt<br />

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© Luis de Bethencourt<br />“We know the hard things are possible, we just have to make the easy things easy.” [Norman Walsh, 2006]<br />

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Used Images<br />(1) http://www.flickr.com/photos/aussiegall/364313299/<br />(2) http://www.flickr.com/photos/xpmatteo/3871265342/<br />(3) http://www.flickr.com/photos/gadl/91682524/<br />(4) http://www.flickr.com/photos/irinaslutsky/2270350707/<br />(5) http://www.flickr.com/photos/luisbg/2072134438/<br />(7) http://www.flickr.com/photos/jurvetson/157722937/<br />(8) http://www.flickr.com/photos/uaeincredible/64162372/<br />(9) http://www.flickr.com/photos/jvs11/4253275748/<br />(10) http://www.flickr.com/photos/davidw/3501319155/<br />(11) http://www.flickr.com/photos/glasgows/<br />(13) http://www.flickr.com/photos/clevercupcakes/4397152402/<br />(14) http://www.flickr.com/photos/aka_kath/3035345165/<br />(16) http://www.flickr.com/photos/genista/6705950/<br />(17) http://www.flickr.com/photos/deapeajay/2597109669/<br />(22) http://www.flickr.com/photos/aka_kath/3035345165/<br />(23) http://www.flickr.com/photos/mdid/2698688454/<br />(24) http://www.flickr.com/photos/arenamontanus/2530501831/<br />(25) http://www.flickr.com/photos/ieatwaffles/2481416932/<br />(26) http://www.flickr.com/photos/luisbg/2072134438/<br />