Resource discovery includes the Key technologies about resource describe, storage and maintenance of resource information, resource query, and the spread of query message, etc.
网格资源发现中涉及的几个方面有资源描述、资源信息的存储和维护、资源查询、查询消息的传播等等。
When there is no information for a page or query yet, a helpful message telling the user how to start could go in that empty space.
当一个页面没有信息时或是有疑问时，在界面上空的地方放置一句有帮助的信息提示来告诉用户怎么开始将是有益的。
Once it's been determined that a message doesn't fit the definition query, the logic becomes much simpler.
当它确定一个消息不符合定义查询时，逻辑就变得简单多了。
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