Question

After reading and seeing the samples here

Given the example of uri :

 http://a/b/c/d;p?q

redirecting to "g" will redirect me to http://a/b/c/g ( cause c is the directory)

So I ask myself when should i use ./g

It is actually the same [goto current folder and find g]

so Why this syntax is even exists ? ./ when should I use it ?

Answer 1

I’d put it this way:

There is no special reason why this construct exists (or was created/defined). It simply exists because it is a logical combination of other constructions (., /,/g) that are required and thus defined out of other reasons. Since those constructions (path components here) can be combined more or less without limitation the questionable constrcut ./g is well defined and thus valid. But that does not mean that there must be special reason why exactly this construct was or has to be defined.