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eLib Technical Issues Concertation Day: Mobile Code and VRML

eLib Technical Issues Concertation Day: Mobile Code and VRML. Brian Kelly UK Web Focus UKOLN, University of Bath, Bath B.Kelly@ukoln.ac.uk http://www.ukoln.ac.uk/. Contents. Mobile Code CGI Java ActiveX VRML Issues. Mobile Code. CGI Model Common Gateway Interface

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eLib Technical Issues Concertation Day: Mobile Code and VRML

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  1. eLib Technical Issues Concertation Day:Mobile Code and VRML Brian Kelly UK Web Focus UKOLN, University of Bath, Bath B.Kelly@ukoln.ac.uk http://www.ukoln.ac.uk/

  2. Contents Mobile Code • CGI • Java • ActiveX VRML Issues

  3. Mobile Code CGI Model • Common Gateway Interface • Run software on server • Output (virtual or dynamic document) delivered to client Mobile Code • Download code from server and run on client computer • Examples include Java and SafeTCL • Security is a big issue

  4. Java http://java.sun.com:81/nav/used/metamedia.html? Java is Sun’s implementation of mobile code: • Security built-in (runs on virtual machine) • Support from major manufacturers (Sun, Netscape, Microsoft, IBM, …) • Not for the novice programmer

  5. ActiveX ActiveX is Microsoft’s implementation of mobile code: • A framework for integration, not a programming language • Developed from Microsoft’s OLE desktop model • Security based on digital signatures http://www.microsoft.com/activex/gallery/

  6. ActiveX Example http://www.futuretense.com/texture/gallery/Gazette/Gazette.html ActiveX contols can be written in Java. Here the Future-Tense Texture ActiveX control gives contol over the layout, as well as restricting access to the document source

  7. VRML VRML: • Virtual Reality Model(l)ing Language • Brings 3D worlds to WWW VRML specifications: • VRML 1.0 - Simple spec, produced quickly. Based on SG Inventor • VRML 2.0 - Provides interaction • Voting on VRML 2.0 proposals, followed by agreement

  8. VRML Example VRML browsers are now bundled in with Netscape and Microsoft Explorer browsers

  9. Further Information See also resources athttp://www.yahoo.com/ Java • http://java.sun.com/ • http://www.jars.com/ • http://www.gamelan.com/ ActiveX • http://www.microsoft.com/activex/ • http://www.activex.com/ VRML • http://vrml.wired.com/ • http://www.sdsc.edu/vrml/

  10. Issues Issues which WWW developers will have to address include: • Is VRML relevant to my project? • Which architecture of mobile code to use? • Deployment of new features (e.g. Java support, VRML support)

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