9. 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
15. 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>
<p about=quot;#event1quot; typeof=quot;cal:Veventquot;>
<b property=quot;cal:summaryquot;>Weekend off in Iona</b>:
<span property=quot;cal:dtstartquot; datatype=quot;xs:datequot;>2006-10-21
</span> to
<span property=quot;cal:dtendquot; datatype=quot;xs:datequot;>2006-10-23
</span>.
see <a rel=quot;cal:urlquot; href=quot;http://freetime.example.org/quot;>
Free time web site</a> for info on
<span property=quot;cal:locationquot;>Iona, UK</span>.
</p>
</body>
</html> 15
16. 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>
<p about=quot;#event1quot; typeof=quot;cal:Veventquot;>
<b property=quot;cal:summaryquot;>Weekend off in Iona</b>:
<span property=quot;cal:dtstartquot; datatype=quot;xs:datequot;>2006-10-21
</span> to
<span property=quot;cal:dtendquot; datatype=quot;xs:datequot;>2006-10-23
</span>.
see <a rel=quot;cal:urlquot; href=quot;http://freetime.example.org/quot;>
Free time web site</a> for info on
<span property=quot;cal:locationquot;>Iona, UK</span>.
</p>
</body>
</html> 16
17. 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>
<p about=quot;#event1quot; typeof=quot;cal:Veventquot;>
<b property=quot;cal:summaryquot;>Weekend off in Iona</b>:
<span property=quot;cal:dtstartquot; datatype=quot;xs:datequot;>2006-10-21
</span> to
<span property=quot;cal:dtendquot; datatype=quot;xs:datequot;>2006-10-23
</span>.
see <a rel=quot;cal:urlquot; href=quot;http://freetime.example.org/quot;>
Free time web site</a> for info on
<span property=quot;cal:locationquot;>Iona, UK</span>.
</p>
</body>
</html> 17
18. 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>
<p about=quot;#event1quot; typeof=quot;cal:Veventquot;>
<b property=quot;cal:summaryquot;>Weekend off in Iona</b>:
<span property=quot;cal:dtstartquot; datatype=quot;xs:datequot;>2006-10-21
</span> to
<span property=quot;cal:dtendquot; datatype=quot;xs:datequot;>2006-10-23
</span>.
see <a rel=quot;cal:urlquot; href=quot;http://freetime.example.org/quot;>
Free time web site</a> for info on
<span property=quot;cal:locationquot;>Iona, UK</span>.
</p>
</body>
</html> 18
19. 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>
<p about=quot;#event1quot; typeof=quot;cal:Veventquot;>
<b property=quot;cal:summaryquot;>Weekend off in Iona</b>:
<span property=quot;cal:dtstartquot; datatype=quot;xs:datequot;>2006-10-21
</span> to
<span property=quot;cal:dtendquot; datatype=quot;xs:datequot;>2006-10-23
</span>.
see <a rel=quot;cal:urlquot; href=quot;http://freetime.example.org/quot;>
Free time web site</a> for info on
<span property=quot;cal:locationquot;>Iona, UK</span>.
</p>
</body>
</html> 19
20. 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