The base activity library is a collection of activities used to create workflows.

WF provides developers a declarative way to create workflows by using extensible Application Markup Language (XAML). The files used to store such workflow markups are known as extensible Object Markup Language (XOML) files.

Yes

A system workflow is a workflow that is developed to automate interactions among applications. Such workflow is usually static and predictable. On the other hand, a human workflow is a workflow that coordinates interactions of applications with people. As human workflows involve both software and people, they need to be more flexible than system workflows.

You can implement a condition by using either of the following ways:
• By creating a rule condition - Specifies that you can implement conditions either directly in code or by using a tool, called the Rule Condition Editor. Rule conditions are stored in a separate Extensible Markup Language (XML) file. When a rule condition occurs in a workflow, the expression in a condition is evaluated and a Boolean value is returned.
• By creating a code condition - Refers to defining a condition directly in code. A code condition can be created by writing a method in the code. The method contains code for the condition and returns aBoolean value.