Explain the element,attribute,node,payload,URN and URL ? and Testing tools for XI?

Element:Element is a simple XML TAG.

Attribute:Properties of XML TAG.

Node:Logical set of group of XML TAG.

Payload:payload is actual content of message (Business data).

URN and URL:urn means uniform resource navigator, which does'nt uses any protocal in which while giving this urn it should be unique in ur system.url means uniform resource locator, which uses the protocal i.e http.

Testing tools for XI: Mercury load runner.