GridLab
Grid Application Toolkit

A simple API for Grid Applications 		GAT
Menu


next up previous contents
Next: Relative URI's Up: Absolute URI's Previous: Hierarchical Absolute URI's   Contents

Opaque Absolute URI's

A opaque absolute URI most commonly has the form 

                              scheme:opaquepart
The schema part of a opaque absolute URI is just like the schema part of a hierarchical absolute URI. But, there are certain schemas which can only be used for hierarchical URI's and certain schemas which can only be used for opaque URI's. For example the following URI
mailto:mduerst@ifi.unizh.ch
is an opaque URI with the schema mailto. This particular schema can only be used with opaque URIs.

The opaquepart of a opaque absolute URI is a string that does not begin with a ``/'' character. In out example above the opaque absolute URI

mailto:mduerst@ifi.unizh.ch
has the opaquepart mduerst@ifi.unizh.ch. The interpretation of the opaquepart is dependent upon the particular schema of the URI. In this case it is an email address. However, for a different opaque absolute URI
news:comp.infosystems.www.servers.unix
it may indicate something completely different, in this case a news group on a particular server.

next up previous contents
Next: Relative URI's Up: Absolute URI's Previous: Hierarchical Absolute URI's   Contents
Andre Merzky 2004-05-13