如果定义了多个通道出口，则可以定义多个以逗号分隔的用户数据集。
If multiple channel exits are defined, you can define multiple sets of user data, separated by a comma.
它拥有非常大的条目数(超过600k) -和那些通常用户数大的数据集相比要大得多。
It has a very large set of items (over 600k) - much larger than any similar dataset, where usually only the number of users is large.
下面的例子把所有使用用户数据‘MYAPP’，并于2010年创建的spool文件添加到一个对象集。
This example indexes spool files that were created with user data 'MYAPP' and were created in 2010.
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