If the document is on the local machine/disk and the User wants the
application to maintain a copy of it on the server, then the User should select
the "Upload" option. The User then selects the document to be uploaded
using the familiar file browsing mechanism. The document will be
uploaded and placed in a directory and the appropriate URL will be
automatically generated.
If the document is already on the server, than the User simply
enters the URL for the document. This can be a complete URL of the
form "http://hostname/pathname/filename.ext" or any path starting with
"/" of the form "/users/username/filename.ext".
If the User does not wish to create or point to a real document then the
third option can be used. It indicates simply that the text in the
Description field should be treated as a Document. This option is
useful for adding small scraps of information on-the-fly.
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