**5.5 User layer**

At the top of the framework, we can find user layer including agents, men and machines. Men and machines can use web2.0 application of application layer by intelligent agents. Men, machines and agents at the long tail of organizational knowledge chain are encourage to take part in knowledge processing activities in order to build organizational knowledge ecosystems which support mass-collaborative, self-organized, and Meta-synthesized Knowledge Processing.

### **5.6 Trust and security**

Shown as figure 1, it is evident that trust and security are common challenge for all the layers and can't be ignored by any of the layers. Therefore, a holistic security and trust solution is required in the framework. In general, the trust of two top layers- user layer and application layer - could be implemented by interaction between agents, at the same time, the security of the other three layers should use information security technologies, including encryption or certificate authentication.

#### **5.7 Man-machine collaboration**

Man-machine collaborative knowledge processing is one of most protruding features in the framework which inherits from web2.0. It should be put on top of the list to maximize the complementary advantages of man and machine when developing or selecting methods and technologies for each layer.
