步骤2：创建属性定义（仅限于ProcessServerv6.0.2）
Step 2: Create property definitions (Process Server v6.0.2 only)
当我们创建好一个搜索范围后，就可以定义其属性和规则了。
After you create a search scope, you can define its properties and rules.
如果属性在以前没有定义上，在赋值时就会创建出来。
If a property has not been defined before, then it will be created during assignment.
如果属性在以前没有定义上，在赋值时就会创建出来。
If a property has not been defined before, then it will be created during assignment.
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