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ELIS Multimedia Lab Functional Descriptions as the Bridge between Hypermedia APIs and the Semantic Web Ruben Verborgh Thomas Steiner Davy Van Deursen Sam Coppens Joaquim Gabarro Rik Van de Walle Is following your nose

  1. ELIS – Multimedia Lab Functional Descriptions as the Bridge between Hypermedia APIs and the Semantic Web Ruben Verborgh · Thomas Steiner · Davy Van Deursen Sam Coppens · Joaquim Gabarro · Rik Van de Walle

  2. Is following your nose sufficient?

  3. How I got to Lyon. Lille REIMS Dijon Lyon

  4. Did I really follow my nose?

  5. What would have happened if I had actually followed my nose.

  6. If I had followed my nose, it would have taken forever to find the sign that says Lyon

  7. Signs everywhere, but which should my nose follow? Brussels Eindhoven Vienna Munich

  8. Following my nose was easy, because I knew what to look for. Lille REIMS Dijon Lyon

  9. As a human, you can follow your nose because you know how to. You always have some plan, and use your nose to find the next step.

  10. RESTdesc tells machines how to follow their nose. It allows them to create a plan so they can find the next step.

  11. ELIS – Multimedia Lab RESTdesc describes the functionality of hypermedia APIs. Why? – need and challenges What? – syntax and structure So what? – benefits and potential

  12. ELIS – Multimedia Lab This hypermedia API creates a thumbnail of a photograph. Send a photo Send a photo, retrieve its thumbnail.

  13. ELIS – Multimedia Lab API description methods already exist. There are 10+ ways to describe that the input is an image and the output is an image. This doesn’t tell machines what the API does.

  14. ELIS – Multimedia Lab API description methods already exist. There are 10+ ways to describe that the input is a photo and the output is a thumbnail. This doesn’t tell machines what the API does.

  15. ELIS – Multimedia Lab The functional relationship is missing. What thumbnail?

  16. ELIS – Multimedia Lab Only the functional relationship tells the full story. What thumbnail? Send a photo, retrieve its thumbnail.

  17. ELIS – Multimedia Lab RESTdesc describes the functionality of hypermedia APIs. Why? – need and challenges What? – syntax and structure So what? – benefits and potential

  18. ELIS – Multimedia Lab RESTdesc expresses functionality in a Semantic Web language. HTTP resources and hypermedia links Notation3 small superset of RDF Your own vocabulary

  19. ELIS – Multimedia Lab RESTdesc expresses functionality in a Semantic Web language. HTTP resources and hypermedia links Notation3 small superset of RDF Your own vocabulary

  20. ELIS – Multimedia Lab RDF expresses everything in three parts. ! !"#$%&'&(!)*+,(!$%&'&- "" !!!!!!!!!!!!!!!!!!!!!!!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! subject verb object !!

  21. ELIS – Multimedia Lab Namespaces create universal meaning. #$%&'()! ! !*+,,$-..&)/0$1&"2%3.$+2,2.4"! #$%&'()! ./0! !*+,,$-..555"56"2%3.7888.9:.::;%<';=>?,/);?=@4" #$%&'()! /123/),! !*+,,$-..<A$&<(/"2%3.%&=2B%C&.4" -D>E+2,2! ./0! ,>$&! /123/),! E+2,2""" !!!!!!!!!!!!!!!!!!!!!!!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! namespaces !!

  22. ELIS – Multimedia Lab Notation3 variables allow generalized expressions. #$%&'()!-!*+,,$-..&)/0$1&"2%3.$+2,2.4"! #$%&'()!%<'-!*+,,$-..555"56"2%3.7888.9:.::;%<';=>?,/);?=@4" #$%&'()!<A$&<(/-!*+,,$-..<A$&<(/"2%3.%&=2B%C&.4" 452%&'& !%<'-,>$&!<A$&<(/-E+2,2" 6 !!!!!!!!!!!!!!!!!!!!!!!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! variables !!

  23. ELIS – Multimedia Lab Implications quantify and connect variables. #$%&'()!-!*+,,$-..&)/0$1&"2%3.$+2,2.4"! #$%&'()!%<'-!*+,,$-..555"56"2%3.7888.9:.::;%<';=>?,/);?=@4" #$%&'()!<A$&<(/-!*+,,$-..<A$&<(/"2%3.%&=2B%C&.4" FG$+2,2!%<'-,>$&!<A$&<(/-E+2,2"H 78 !!!!!!!!!!!!!!!!!!!!!!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !!FG$+2,2!%<'-,>$&!<A$&<(/-I0/3&"H" implications (if – then)

  24. ELIS – Multimedia Lab We want to explain the functionality of the thumbnail API to machines. rel = "smallThumbnail"

  25. ELIS – Multimedia Lab RESTdesc tells the full story with the functional relationship. #$%&'()!&)-!*+,,$-..&)/0$1&"2%3.(0/3&@4" #$%&'()!+,,$-!*+,,$-..555"56"2%3.:977.+,,$@4" #$%&'()!<A$&<(/-!*+,,$-..<A$&<(/"2%3.%&=2B%C&.4" #$%&'()!<A$&<(/;251-!*+,,$-..<A$&<(/"2%3.2?,2123>.4" F !!G$+2,2!&)-=0/11J+B0A?/(1!G%&=2B%C&" H K4 F !!L-%&MB&=,!+,,$-0&,+2<N/0&!OPQJOR !!!!!!!!!!!!+,,$-%&MB&=,STI!G%&=2B%C&R !!!!!!!!!!!!+,,$-%&=$!U!+,,$-A2<>!G%&=2B%C&!V" !!G$+2,2!<A$&<(/;251-,+B0A?/(1!G%&=2B%C&" !!G%&=2B%C&!/!<A$&<(/-I0/3&R !!!!!!!!!!!!<A$&<(/;251-+&(3+,!W9"9" H"

  26. ELIS – Multimedia Lab RESTdesc tells the full story with the functional relationship. rel = "smallThumbnail" F IF !!G$+2,2! 39!*:,;;<%=:1>,); !G%&=2B%C&" H K4 F !!L-%&MB&=,!+,,$-0&,+2<N/0&!OPQJOR !!!!!!!!!!!!+,,$-%&MB&=,STI!G%&=2B%C&R !!!!!!!!!!!!+,,$-%&=$!U!+,,$-A2<>!G%&=2B%C&!V" !!G$+2,2!<A$&<(/;251-,+B0A?/(1!G%&=2B%C&" !!G%&=2B%C&!/!<A$&<(/-I0/3&R !!!!!!!!!!!!<A$&<(/;251-+&(3+,!W9"9" H"

  27. ELIS – Multimedia Lab RESTdesc tells the full story with the functional relationship. rel = "smallThumbnail" F !!G$+2,2!&)-=0/11J+B0A?/(1!G%&=2B%C&" H THEN 78 F !!L-%&MB&=,!+,,$-0&,+2<N/0&!OPQJOR !!!!!!!!!!!!+,,$-%&MB&=,STI!G%&=2B%C&R !!!!!!!!!!!!+,,$-%&=$!U!+,,$-A2<>!G%&=2B%C&!V" !!G$+2,2!<A$&<(/;251-,+B0A?/(1!G%&=2B%C&" !!G%&=2B%C&!/!<A$&<(/-I0/3&R !!!!!!!!!!!!<A$&<(/;251-+&(3+,!W9"9" H"

  28. ELIS – Multimedia Lab RESTdesc tells the full story with the functional relationship. rel = "smallThumbnail" F !!G$+2,2!&)-=0/11J+B0A?/(1!G%&=2B%C&" H K4 F ((+!.3?=3*'(%''2!:3'%&/@,:3(ABC<AD ((((((((((((%''2!.3?=3*'EFG(5.3*&=.H3D ((((((((((((%''2!.3*2(I(%''2!1&/#(5.3*&=.H3(J- !!G$+2,2!<A$&<(/;251-,+B0A?/(1!G%&=2B%C&" !!G%&=2B%C&!/!<A$&<(/-I0/3&R !!!!!!!!!!!!<A$&<(/;251-+&(3+,!W9"9" H"

  29. ELIS – Multimedia Lab RESTdesc tells the full story with the functional relationship. rel = "smallThumbnail" F !! 52%&'& !&)-=0/11J+B0A?/(1!G%&=2B%C&" H Send a photo, retrieve its thumbnail. K4 F !!L-%&MB&=,!+,,$-0&,+2<N/0&!OPQJOR !!!!!!!!!!!!+,,$-%&MB&=,STI!G%&=2B%C&R !!!!!!!!!!!!+,,$-%&=$!U!+,,$-A2<>!G%&=2B%C&!V" !! 52%&'& !<A$&<(/;251-,+B0A?/(1!G%&=2B%C&" !!G%&=2B%C&!/!<A$&<(/-I0/3&R !!!!!!!!!!!!<A$&<(/;251-+&(3+,!W9"9" H"

  30. ELIS – Multimedia Lab RESTdesc tells the full story with the functional relationship. rel = "smallThumbnail" F !!G$+2,2!&)-=0/11J+B0A?/(1!G%&=2B%C&" H K4 F !!L-%&MB&=,!+,,$-0&,+2<N/0&!OPQJOR !!!!!!!!!!!!+,,$-%&MB&=,STI!G%&=2B%C&R !!!!!!!!!!!!+,,$-%&=$!U!+,,$-A2<>!G%&=2B%C&!V" !!G$+2,2!<A$&<(/;251-,+B0A?/(1!G%&=2B%C&" ((5.3*&=.H3(,(/123/),!G:,K3D ((((((((((((/123/),L&M;!%3)K%'(NO-O- H"

  31. ELIS – Multimedia Lab RESTdesc tells the full story with the functional relationship. #$%&'()!&)-!*+,,$-..&)/0$1&"2%3.(0/3&@4" #$%&'()!+,,$-!*+,,$-..555"56"2%3.:977.+,,$@4" #$%&'()!<A$&<(/-!*+,,$-..<A$&<(/"2%3.%&=2B%C&.4" #$%&'()!<A$&<(/;251-!*+,,$-..<A$&<(/"2%3.2?,2123>.4" F !!G$+2,2!&)-=0/11J+B0A?/(1!G%&=2B%C&" H K4 F !!L-%&MB&=,!+,,$-0&,+2<N/0&!OPQJOR !!!!!!!!!!!!+,,$-%&MB&=,STI!G%&=2B%C&R !!!!!!!!!!!!+,,$-%&=$!U!+,,$-A2<>!G%&=2B%C&!V" !!G$+2,2!<A$&<(/;251-,+B0A?/(1!G%&=2B%C&" !!G%&=2B%C&!/!<A$&<(/-I0/3&R !!!!!!!!!!!!<A$&<(/;251-+&(3+,!W9"9" H"

  32. ELIS – Multimedia Lab State-changing operations are supported, too. GET, HEAD dereferencing PUT, PATCH, DELETE fully defined POST resource-specific state changes

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