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Dynamic Web Pages (cont)

For CGI and SSP, the scripts (HTML generators) are invoked
  • via a URL   (giving the name and type of application)
  • passing some data values   (either in the URL or via stdin)
The data values are typically
  • collected in a fill-in form which invokes the script
  • passed from page to page (script to script) via GET/POST
(other mechanisms for data transmission include cookies and server-state)