The character data nodes are depicted in black and include

字符数据节点显示为黑色，包括

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Here again, you use XPath to navigate to the data nodes that need to be modified.

这里同样使用XPath导航到需要修改的数据节点。

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In a hierarchical database (HDBMS), you begin with a strictly defined tree of data nodes.

在层次数据库(HDBMS)中，首先是从严格定义的数据节点树开始的。

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This means more cell towers, more small cells, more Wi-Fi, more advanced technology like LTE and MIMO, more spectrum, and more Ethernet optical fiber links connecting all these wireless and data center nodes.

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Remember, the benchmark is Consumer Web companies like Facebook, Google and Twitter, which deal with hundreds of millions of human data-creating nodes, amounting to petabytes of flow.

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Graphs: Neo4J is a special purpose database designed for maintaining large graphs: data where the data items are nodes, with edges representing the connections between the nodes.

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