父节点(parent node)与子节点(children node)：如图，B直接连到E与F且只差一个阶度，则B为E与F的父节点，E与F为B的子节点。
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Grouping and children node types 组和子节点
The node has children 该节点具有自身的子节点
Data sources are the children node of a JDBC provider, so its parent is a JDBC provider.
数据源是JDBC提供程序的子节点，因此其父节点为JDBC提供程序。
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However there was still no diagnosis - and Blaze was moved to Manchester Children's Hospital where another raft of tests, including a lymph node biopsy and a bone marrow test, were carried out.
BBC: Health
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