因为此信息是树下的几个节点，所以点符号用于说明针对查询解析器的所需节点的确切层次位置。
Because this information is a few nodes down in the tree, dot notation is used to indicate the exact hierarchical position of the required nodes to the query parser.
因为此信息是树下的几个节点，所以点符号用于说明针对查询解析器的所需节点的确切层次位置。
Because this information is a few nodes down in the tree, dot notation is used to indicate the exact hierarchical position of the required nodes to the query parser.
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