• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Section F.1. Background and Assumptions

F.1. Background and Assumptions

The principal problem addressed by the Linearized PDF design is the access of PDF documents through the Web. This environment has the following important properties:

  • The access protocol (HTTP) is a transaction consisting of a request and a response. The client presents a request in the form of a URL, and the server sends a response consisting of one or more MIME-tagged data blocks.

  • After a transaction has completed, obtaining more data requires a new request-response transaction. The connection between client and server does not ordinarily persist beyond the end of a transaction, although some implementations may attempt to cache the open connection to expedite subsequent transactions with the same server.

  • Round-trip delay can be significant. A request-response transaction can take up to several seconds, independent of the amount of data requested.

  • The data rate may be limited. A typical bottleneck is a slow modem link between the client and the Internet service provider.


PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint