difference between URN, URL, and HTTP

[Former Member]

hello,

wat is the diference between URN, URL, and HTTP

[prasanthi_chavala]

Hi Bindu,

A Name space should be globally unique identifier. We use a URI to define that unique string, and since URLs are the most common URIs, generally we tend to use plain http URLs as the namespace

1) URI: Uniform Resource indicator,URL but not necessarily point to web resouce

2) URN: Uniform resource name,like a URI but without a protocol assignment.

Note: Before posting the thread, please search in forums.

Thanks,

Prasanthi.

[Former Member]

Hi BIndu,

If u have searched on SDN then u will get many answers.

Just refer the below links:

http://help.sap.com/saphelp_nw04/helpdata/en/4e/83623c9c6b530de10000000a114084/content.htm

Thnx

Chirag

Reward points for helpful answers.

[nisarkhan_n]

The idea is that a URL is a mechanical link to a resource's location, where it can be downloaded. For this reason, a URL contains a hostname and a local part, all of which can be resolved anywhere on the Internet.

What a URN tries to do is different. It tries to give a description of a resource without actually pointing at it. For example:

urn:isbn:90-365-17273

This is the URN for my PhD thesis, but it does not give you a clue where you could get it. The idea is that you need resolution software to come to that. The word isbn is a so-called URN-space, and it has been registered formally. There are also non-global URN spaces, they start with an x- prefix.

URI is merely the possibly overlapping union of strings that are a URL or a URN.