RDFa In A Nutshell V2

in a nutshell RDFa fabien, gandon, inria

many data buried and dormant in web pages 2

in particular data in the deep web 3

several initiatives to make data embedding explicit 4

for specific, common, concise data for custom data, RDF data, multiple schemas 5

RDFa = a domain-independent way to explicitly embed your data 6

RDFa = a domain-independent way to explicitly embed RDF data 7

RDFa stands for… RDF… in HTML … attributes 8

RDFa in attributes of a web page to… … transfer data from an application to another through the web. … write data only once for web users and web applications. 9

weaving RDFa in web pages 10

RDFa step 1 declare the schemas you are using 11

RDFa step 2 use attributes to mark, type and add data 12

RDFa step 3 let RDFa agents extract RDF from the document 13

take this minimal web page 14

don't look at the code of this web page <html xmlns=quot;http://www.w3.org/1999/xhtmlquot; xmlns:cal=quot;http://www.w3.org/2002/12/cal/icaltzd#quot; xmlns:xs=quot;http://www.w3.org/2001/XMLSchema#quot; > <body> Weekend off in Iona: 2006-10-21 to 2006-10-23 . see <a rel=quot;cal:urlquot; href=quot;http://freetime.example.org/quot;> Free time web site</a> for info on Iona, UK. </body> </html> 15

schemas for data in this web page <html xmlns=quot;http://www.w3.org/1999/xhtmlquot; xmlns:cal=quot;http://www.w3.org/2002/12/cal/icaltzd#quot; xmlns:xs=quot;http://www.w3.org/2001/XMLSchema#quot; > <body> Weekend off in Iona: 2006-10-21 to 2006-10-23 . see <a rel=quot;cal:urlquot; href=quot;http://freetime.example.org/quot;> Free time web site</a> for info on Iona, UK. </body> </html> 16

data seen by users viewing this web page <html xmlns=quot;http://www.w3.org/1999/xhtmlquot; xmlns:cal=quot;http://www.w3.org/2002/12/cal/icaltzd#quot; xmlns:xs=quot;http://www.w3.org/2001/XMLSchema#quot; > <body> Weekend off in Iona: 2006-10-21 to 2006-10-23 . see <a rel=quot;cal:urlquot; href=quot;http://freetime.example.org/quot;> Free time web site</a> for info on Iona, UK. </body> </html> 17

data for an RDFa agent in this web page <html xmlns=quot;http://www.w3.org/1999/xhtmlquot; xmlns:cal=quot;http://www.w3.org/2002/12/cal/icaltzd#quot; xmlns:xs=quot;http://www.w3.org/2001/XMLSchema#quot; > <body> Weekend off in Iona: 2006-10-21 to 2006-10-23 . see <a rel=quot;cal:urlquot; href=quot;http://freetime.example.org/quot;> Free time web site</a> for info on Iona, UK. </body> </html> 18

data shared by both in this web page <html xmlns=quot;http://www.w3.org/1999/xhtmlquot; xmlns:cal=quot;http://www.w3.org/2002/12/cal/icaltzd#quot; xmlns:xs=quot;http://www.w3.org/2001/XMLSchema#quot; > <body> Weekend off in Iona: 2006-10-21 to 2006-10-23 . see <a rel=quot;cal:urlquot; href=quot;http://freetime.example.org/quot;> Free time web site</a> for info on Iona, UK. </body> </html> 19

what an RDFa agent knows from this web page #event1 isA cal:Vevent #event1 cal:summary quot;Weekend off in Ionaquot; #event1 cal:dtstart quot;2006-10-21quot;^^xs:date #event1 cal:dtend quot;2006-10-23quot;^^ xs:date #event1 cal:url <http://freetime.example.org/> #event1 cal:location quot;Iona, UKquot; 20

take away message 21

don't bury your data in some HTML page 22

when you publish a page that contains data… 23

do make the embedding explicit 24

fabien, gandon 25

http://rdfa.info	459
http://www.metah.ch	246
http://www.slideshare.net	61
http://www-sop.inria.fr	43
http://fabien-gandon.blogspot.com	40
http://planetrdf.com	28
http://metah.ch	24
http://ahmetgyger.com	15
http://www.rdfa.info	9
http://www.yokway.com:9080	9
http://fabien-gandon.blogspot.fr	8
http://www.poso.dk	8
http://www.netvibes.com	4
http://www.linkedin.com	3
http://linux.philosweb.com	2
http://static.slideshare.net	2
http://localhost:22222	2
http://local.albertslund.dev	1
http://tutorialart.com	1

RDFa In A Nutshell V2

by Fabien Gandon

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