what is the relationship between a XML-Schema file and its namespace

[Preetham <preetham@robosoftin.com>]

I want to know wheather the namespace name we give to a schema can be any
random string or it must be its full path name ?
Does a validater searches for the schema file in the current directory or it
uses the namespace to search the file containing the schema ?
What happens if the file is on some remote computer on the net ?

I am a beginner.

Would anybody please answer me ?



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