Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

La Semantica e il Web dei Dati

3,132 views

Published on

La "semantica" e il Web dei dati: quando uno più uno non fa solo due (April 2nd, 2009)

Published in: Technology, Education
  • DOWNLOAD THE BOOK INTO AVAILABLE FORMAT (New Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://urlzs.com/UABbn } ......................................................................................................................... Download Full EPUB Ebook here { https://urlzs.com/UABbn } ......................................................................................................................... Download Full doc Ebook here { https://urlzs.com/UABbn } ......................................................................................................................... Download PDF EBOOK here { https://urlzs.com/UABbn } ......................................................................................................................... Download EPUB Ebook here { https://urlzs.com/UABbn } ......................................................................................................................... Download doc Ebook here { https://urlzs.com/UABbn } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THE can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THE is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBOOK .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, CookBOOK, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, EBOOK, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THE Helped Ignite a Movement,-- Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THE the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THE Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • DOWNLOAD THE BOOK INTO AVAILABLE FORMAT (New Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THE can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THE is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBOOK .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, CookBOOK, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, EBOOK, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THE Helped Ignite a Movement,-- Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THE the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THE Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • DOWNLOAD THE BOOK INTO AVAILABLE FORMAT (New Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THE can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THE is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBOOK .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, CookBOOK, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, EBOOK, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THE Helped Ignite a Movement,-- Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THE the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THE Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • DOWNLOAD THE BOOK INTO AVAILABLE FORMAT (New Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THE can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THE is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBOOK .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, CookBOOK, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, EBOOK, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THE Helped Ignite a Movement,-- Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THE the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THE Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • DOWNLOAD THIS BOOKS INTO AVAILABLE FORMAT (2019 Update) ......................................................................................................................... ......................................................................................................................... Download Full PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download Full EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download Full doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download PDF EBOOK here { https://soo.gd/irt2 } ......................................................................................................................... Download EPUB Ebook here { https://soo.gd/irt2 } ......................................................................................................................... Download doc Ebook here { https://soo.gd/irt2 } ......................................................................................................................... ......................................................................................................................... ................................................................................................................................... eBook is an electronic version of a traditional print book THIS can be read by using a personal computer or by using an eBook reader. (An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer THIS is used solely as a reading device such as Nuvomedia's Rocket eBook.) Users can purchase an eBook on diskette or CD, but the most popular method of getting an eBook is to purchase a downloadable file of the eBook (or other reading material) from a Web site (such as Barnes and Noble) to be read from the user's computer or reading device. Generally, an eBook can be downloaded in five minutes or less ......................................................................................................................... .............. Browse by Genre Available eBooks .............................................................................................................................. Art, Biography, Business, Chick Lit, Children's, Christian, Classics, Comics, Contemporary, Cookbooks, Manga, Memoir, Music, Mystery, Non Fiction, Paranormal, Philosophy, Poetry, Psychology, Religion, Romance, Science, Science Fiction, Self Help, Suspense, Spirituality, Sports, Thriller, Travel, Young Adult, Crime, Ebooks, Fantasy, Fiction, Graphic Novels, Historical Fiction, History, Horror, Humor And Comedy, ......................................................................................................................... ......................................................................................................................... .....BEST SELLER FOR EBOOK RECOMMEND............................................................. ......................................................................................................................... Blowout: Corrupted Democracy, Rogue State Russia, and the Richest, Most Destructive Industry on Earth,-- The Ride of a Lifetime: Lessons Learned from 15 Years as CEO of the Walt Disney Company,-- Call Sign Chaos: Learning to Lead,-- StrengthsFinder 2.0,-- Stillness Is the Key,-- She Said: Breaking the Sexual Harassment Story THIS Helped Ignite a Movement,-- Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones,-- Everything Is Figureoutable,-- What It Takes: Lessons in the Pursuit of Excellence,-- Rich Dad Poor Dad: What the Rich Teach Their Kids About Money THIS the Poor and Middle Class Do Not!,-- The Total Money Makeover: Classic Edition: A Proven Plan for Financial Fitness,-- Shut Up and Listen!: Hard Business Truths THIS Will Help You Succeed, ......................................................................................................................... .........................................................................................................................
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here

La Semantica e il Web dei Dati

  1. 1. La semantica e il Web dei dati: quando uno più uno non fa solo due Irene Celino CEFRIEL – ICT Institute Politecnico di Milano email: [email_address]
  2. 2. Semantica? <ul><li>In filosofia, la semantica è lo studio del significato </li></ul><ul><li>Ogni giorno, in ogni momento, siamo sommersi di dati, informazioni, contenuti e tanti tipi diversi di media </li></ul><ul><li>Tutti questi dati però, per essere di qualche utilità, necessitano di essere interpretati dalle persone </li></ul><ul><li>La crescita esponenziale della quantità di dati spinge tutti a cercare soluzioni tecnologiche per ovviare a questi problemi </li></ul>
  3. 3. Quali sono le capacità delle macchine <ul><li>I sistemi informatici che utilizziamo tutti i giorni rappresentano l’informazione attraverso </li></ul><ul><ul><li>Il linguaggio naturale (italiano, inglese, cinese, …) </li></ul></ul><ul><ul><li>Grafici, multimedia, … </li></ul></ul><ul><li>Gli esseri umani elaborano facilmente questa informazione </li></ul><ul><ul><li>Possono dedurre fatti da informazione parziale </li></ul></ul><ul><ul><li>Possono creare associazioni mentali </li></ul></ul><ul><ul><li>Sono abituati a interagire con diversi tipi di media (problemi di accessibilità a parte…) </li></ul></ul><ul><li>Invece le macchine sono “ ignoranti ” </li></ul><ul><ul><li>L’informazione parziale è inutilizzabile </li></ul></ul><ul><ul><li>Difficoltà di estrarre il significato ad es. da un’immagine </li></ul></ul><ul><ul><li>Trovare automaticamente analogie è difficile </li></ul></ul><ul><ul><li>Difficoltà di combinare automaticamente le informazioni </li></ul></ul>
  4. 4. L’evoluzione del Web 1 – il Web delle origini 2 – il Social Web 3 – il Semantic Web 4 – l’Ubiquitous Web Connette i documenti Connette le persone Connette la conoscenza Connette le intelligenze Concetto rielaborato tratto da: Nova Spivak, John Breslin, Mills Davis (2008)
  5. 5. Perchè il Semantic Web “ The Semantic Web is a vision: the idea of having data on the Web defined and linked in a way that it can be used by machines not just for display purposes, but for automation , integration and reuse of data across applications ” – Tim Berners-Lee (2003) “ The Semantic Web is not a separate Web but an extension of the current one, in which information is given well-defined meaning , better enabling computers and people to work in cooperation ” – Tim Berners-Lee (2001)
  6. 6. L’integrazione dei dati <ul><li>Il problema dell’integrazione: </li></ul><ul><ul><li>Enormi quantità di dati che crescono ed evolvono in continuazione </li></ul></ul><ul><ul><ul><li>problema di scala </li></ul></ul></ul><ul><ul><li>Tante diverse tipologie di dato (documenti, media, email, risultati Web, contatti, ecc.) </li></ul></ul><ul><ul><ul><li>problema di eteroge- neità dei dati </li></ul></ul></ul><ul><ul><li>Tanti diversi sistemi informativi (DB, applica- zioni legacy, ERP, ecc.) </li></ul></ul><ul><ul><ul><li>problema di eteroge- neità dei sistemi </li></ul></ul></ul>
  7. 7. Quando 1 + 1 > 2 ? <ul><li>L’integrazione dei dati dà sempre un valore aggiunto </li></ul><ul><ul><li>Visione d’insieme: “e pluribus unum” </li></ul></ul><ul><ul><li>Condividere la conoscenza: “l’unione fa la forza” </li></ul></ul><ul><ul><li>Opportunità di business </li></ul></ul><ul><ul><li>Business Intelligence </li></ul></ul><ul><li>Resta il problema tecnologico : </li></ul><ul><ul><li>Chi è riuscito a trarre vantaggio dall’integrazione? </li></ul></ul><ul><ul><li>Come riconciliare l’eterogeneità dei dati? </li></ul></ul><ul><ul><li>La semantica può essere d’aiuto? </li></ul></ul>
  8. 8. La lezione del Web 2.0 <ul><li>La politica della partecipazione e la “saggezza delle folle” </li></ul><ul><li>Il grande successo dei mash-up </li></ul><ul><ul><li>Mash-up: applicazioni realizzate dall’integrazione “light” di artefatti forniti da altri (spesso API o servizi REST) </li></ul></ul><ul><ul><li>Nuovo paradigma di integrazione per la realizzazione di applicazioni </li></ul></ul><ul><li>Pubblicazione e accesso via Web </li></ul><ul><ul><li>È sempre più semplice “memorizzare” l’informazione sul Web </li></ul></ul><ul><ul><li>È sempre più diffuso accedere all’informazione sul Web, facendo affidamento ai motori di ricerca per recuperarla </li></ul></ul>
  9. 9. <ul><li>Per integrare dati provenienti da sorgenti diverse è necessario capire come “incastrare” tra loro i dati </li></ul><ul><li>Per fare questo è necessario guardare al significato dei dati e passare “ dalla sintassi alla semantica ” </li></ul><ul><li>Bisogna riconciliare dati solo in apparenza diversi, facendo leva su alcuni possibili approcci/metriche: </li></ul><ul><ul><li>Distanza semantica : “lontananza” in termini di significato </li></ul></ul><ul><ul><li>Similarità semantica : somiglianza in termini di significato e di “ampiezza” </li></ul></ul>La semantica per l’integrazione
  10. 10. Il Web come piattaforma di integrazione <ul><li>E se l’ integrazione si facesse sul Web ? </li></ul><ul><ul><li>Web come piattaforma </li></ul></ul><ul><ul><li>Data prosumer (producer + consumer) </li></ul></ul><ul><li>“ Web of Data ” </li></ul><ul><ul><li>Passare dall’attuale “Web of Documents” ad un Web dei dati </li></ul></ul><ul><ul><li>Non più solo information retrieval, ma anche data retrieval </li></ul></ul><ul><li>Esporre i propri dati sul Web </li></ul><ul><ul><li>Convertire/tradurre in formato opportuno </li></ul></ul><ul><ul><li>“ Wrap ” della sorgente dati </li></ul></ul>D2R Virtuoso SquirrelRDF SPASQL Relational.OWL DartGrid SPOON Triplify R2O Talis
  11. 11. <ul><li>Linked Data </li></ul><ul><ul><li>La concretizzazione del “Web of Data” (e del Semantic Web) </li></ul></ul><ul><ul><li>Tim Berners-Lee: http ://www.w3.org/DesignIssues/LinkedData </li></ul></ul><ul><li>Linking Open Data Initiative </li></ul><ul><ul><li>Una comunità che pubblica e “linka” i dati sul Web </li></ul></ul><ul><ul><li>http://linkeddata.org/ </li></ul></ul><ul><li>Data cloud </li></ul><ul><ul><li>Oggi si parla molto di cloud computing </li></ul></ul><ul><ul><li>Spesso però non è di sola computazione che si tratta, ma di gestione dei dati e della conoscenza </li></ul></ul>Linked data e data cloud
  12. 12. I linked data visti dall’inventore del Web www.flickr.com/photos/_-amy-_/3167333250/ “ Stop hugging your data” Tim Berners-Lee, 2009 Non lasciare che considerazioni sulla sicurezza o sulla proprietà dei dati ostacolino opportunità e innovazione
  13. 13. Sfide per i linked data <ul><li>Distributed querying </li></ul><ul><ul><li>Interrogare dati distribuiti su diverse sorgenti sul Web disinteressandosi della “posizione” dei dati e ottenendo i risultati già aggregati </li></ul></ul><ul><li>Automatic linkage </li></ul><ul><ul><li>Trovare meccanismi per identificare i punti di contatto tra dati provenienti da fonti diverse e creare i “link” che permettono di passare da una fonte all’altra senza soluzione di continuità </li></ul></ul><ul><li>Distributed reasoning </li></ul><ul><ul><li>Applicare tecniche di inferenza e di ragionamento automatico a dati distri- buiti sul Web, preservando consisten- za e correttezza del ragionamento </li></ul></ul>
  14. 14. LarKC platform Interface Mobile Data Mashup Environment SPARQL query SPARQL result REST request JSON response Request data Data Pipeline Config. PROBLEM : Which Milano monuments or events or friends can I quickly get to from here? Traffic Monuments Events People La ricerca e i linked data: _________ http://www.larkc.eu
  15. 15. Semantics Knowledge Representation & Reasoning Web Services As a basic tool to implement a S ervice O riented A rchitecture Semantic Web Services As a means to realize S ervice O riented A rchitecture Web 2.0 User clustering User-Resource correlation Semantic Search Conceptual Indexing Semantic Matching Automatic Semantic Annotation Combining smart-machine and smart-data Service-Finder aims at developing a platform for service discovery in which Web Services are embedded in a Web 2.0 environment R ealizing W eb S ervice D iscovery at W eb S cale http://www.service-finder.eu La ricerca e i linked data: _____________
  16. 16. Se non vi ho convinto io… http://www.ted.com/index.php/talks/tim_berners_lee_on_the_next_web.html
  17. 17. Grazie dell’attenzione! Irene Celino email: [email_address] web: http://www.cefriel.it , http://swa.cefriel.it Semantic Web Practice CEFRIEL – ICT Institute Politecnico di Milano

×