B2B Integration : A Practical Guide to Collaborative E-commerce

B2B to P2P Evolution 473
participating applications and distribute this information to all the
requesting applications.
Ability to communicate with peers
After an application is able to locate the peers, it should be able to
communicate with them using messages. The communication can be a
request for content, which can be originated by the user or by the
application itself.
Ability to share information with other peers
Once the communication is established with other peers, the application
should be able to receive and provide information such as content and
data to them.
16.2. Leading P2P Protocols
Some of the leading P2P protocols are as under:
16.2.1. Jabber
Jabber is an instant messaging and presence notification, open source
XML-based protocol. Since it is platform neutral, Jabber is interoperable
with messaging across both wireless and browser based messaging
services.
The real-time messages are exchanged as XML streams. Jabber's
open XML protocol contains three top level XML elements, which in
turn contain data through attributes and namespaces.
1. — contains messages that are exchanged among Jabber
users;
2. — provides availability information about Jabber entities;
and
3. (info/query) — structures a rudimentary conversation between
any two entities in Jabber and allows them to pass XML-formatted
queries and responses back and forth.