1. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 1 Frank Allan Hansen, fah@daimi.au.dk RSS as a Distribution Medium for Geo-spatial Hypermedia Frank Allan Hansen Bent Guldbjerg Christensen Niels Olof Bouvin {fah, bentor, bouvin}@daimi.au.dk Department of Computer Science, University of Aarhus Center for Interactive Spaces, ISIS Katrinebjerg

2. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 2 Frank Allan Hansen, fah@daimi.au.dk Overview Introduction to the HyCon framework –Context-aware hypermedia –Application examples –Infrastructure RSS –XML syndication format –From HyCon Annotations to RSS –Distribution with Pingback RSS integration into geo-spatial hypermedia systems Conclusion & questions

3. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 3 Frank Allan Hansen, fah@daimi.au.dk Context-aware Hypermedia Bluetags RFID Visual Tag ID

4. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 4 Frank Allan Hansen, fah@daimi.au.dk HyCon Applications HyConExplorer: Geo-spatial browser and annotation system HyConBoard Web publishing

5. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 5 Frank Allan Hansen, fah@daimi.au.dk HyCon Infrastructure

6. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 6 Frank Allan Hansen, fah@daimi.au.dk HyCon Infrastructure The component based framework is a nice platform for application developers …But a bit heavy-weight to host for the average user –DB, Application server, Web server Typical needs: –Post pictures and comments to a Web server –Share postings with friends and family –Browse and view information in the field Geo-spatial browser and moblog?

7. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 7 Frank Allan Hansen, fah@daimi.au.dk Blogs and RSS Can blog servers and RSS feeds be used as the distribution medium for geo-spatial hypermedia? Anchored moblogs? –Each user has a personal blog to post to –Other users may comment on blog postings –Comments may be distributed over multiple blogs using systems such as Pingback and Trackback –Documents and comments are syndicated and distributed as XML RSS feeds

8. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 8 Frank Allan Hansen, fah@daimi.au.dk RSS VersionOwnerNameStatus 0.90NetscapeRDF Site SummaryObsoleted by 1.0 0.91UserLandRich Site SummaryOfficially obsoleted by 2.0 0.92, 0.93, 0.94 UserLandRich Site SummaryObsoleted by 2.0 1.0 RSS-DEV Working Group RDF Site SummaryStable core, active module development 2.0UserLandReally Simple SyndicationStable core, active module development http://xml.com Blogs typically publish feeds along to axis: 1.All postings in the blog 2.All comments of a posting HyCon Blog...... http://www.../wp/?feed=comments-rss2&p=1...

9. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 9 Frank Allan Hansen, fah@daimi.au.dk From HyCon Annotations to RSS

10. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 10 Frank Allan Hansen, fah@daimi.au.dk From HyCon Annotations to RSS <rss version="2.0" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:dc="..."> HyCon Blog... <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#" xmlns:hycon="http://hycon.daimi.au.dk/ns/"> 10.1671 561759 572460 6226278 Hello world! http://www.../wp/?p=1 http://www.../wp/?p=1#comments Mon, 13 May 2005 12:01:05 +0000 Administrator http://www.../wp/?p=1 This is a blog post http://www.../wp/?feed=comments-rss2&p=1 Basic Geo (WGS84 lat/long) Vocabulary http://www.w3.org/20 03/01/geo/

11. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 11 Frank Allan Hansen, fah@daimi.au.dk Distributed annotations with Pingback Comments may be distributed over multiple blogs using systems such as Pingback and Trackback –Pingback is a method for web authors to request notification when somebody links to one of their documents. Typically, web publishing software will automatically inform the relevant parties on behalf of the user, allowing for the possibility of automatically creating links to referring documents.

12. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 12 Frank Allan Hansen, fah@daimi.au.dk Distributed annotations with Pingback Alice’s blog Bob’s blog Comments

13. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 13 Frank Allan Hansen, fah@daimi.au.dk Distributed annotations with Pingback Alice’s blog Bob’s blog Comments Bob comments on Alice’s post Pingback Comments links are update on Alice’s blog Back link

14. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 14 Frank Allan Hansen, fah@daimi.au.dk Distributed annotations with Pingback Alice’s blog Bob’s blog Comments Back links

15. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 15 Frank Allan Hansen, fah@daimi.au.dk Integrating RSS into HyCon RSS can represent distributed geo-spatial hypermedia structures …How can we use them in existing geo- spatial hypermedia systems such as the HyConExplorer? Add a facade to the system!

16. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 16 Frank Allan Hansen, fah@daimi.au.dk HyConExplorer/J2ME Architecture

17. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 17 Frank Allan Hansen, fah@daimi.au.dk HyConExplorer/J2ME RSS Architecture

18. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 18 Frank Allan Hansen, fah@daimi.au.dk Conclusion RSS is designed to syndicate blogs and comments Augmenting the format with a simple RDF element allows us to anchor RSS-items in context The use of RSS and blog servers gives us: –A distributed, multi-user geo-spatial annotation system Scales as well as the Web –Annotation structures are available both for mobile geo- spatial systems and on the Web –Filtering is for free No central hyperbase with annotation Users simply subscribe to interesting feeds

19. ISIS Katrinebjerg i n t e r a c t i v e s p a c e s. n e t 19 Frank Allan Hansen, fah@daimi.au.dk Questions ? For more information about the HyCon framework and HyCon applications please visit: http://www.daimi.au.dk/~fah/hycon/html Thank you!