Propagation and inheritence differences and clarification websphere portal wcm

Creating a role block - 

1. On the initial Resource Permissions screen, click the appropriate resource type.
2. If necessary, search for the appropriate resource instance.
3. Click the appropriate Assign Access icon.
4. To create a propagation block, remove the check mark from the appropriate Allow Propagation checkbox. Children of the resource will no longer inherit any assignments for this role type.
5. To create an inheritance block, remove the check mark from the appropriate Allow Inheritance checkbox. This resource will no longer inherit any assignments for this role type from the parent resource.
6. Click OK.

Removing a role block-

1. On the initial Resource Permissions screen, click the appropriate resource type.
2. If necessary, search for the appropriate resource instance.
3. Click the appropriate Assign Access icon.
4. To remove a propagation block, click the appropriate Allow Propagation checkbox so that a check mark appears. Children of the resource will now inherit all assignments for this role type.
5. To remove an inheritance block, click the appropriate Allow Inheritance checkbox so that a check mark appears. The resource will now inherit all assignments for this role type from the parent resource.
6. Click OK.