## Rule `ChildXmlTree_2`

`ChildXmlTree` |  | `POSITION` `XmlPath_opt`

#### Description

``POSITION`` is an `int` (say, `n`) and refers to the `n`th child CST node. When ``XmlPath_opt`` is empty, an `ChildXmlTree` refers to the XML element of the `n`th child CST node. When ``XmlPath_opt`` is not empty, it is a bracketed, dot-separated sequence of ``POSITION``'s (see ``XmlPath``). This sequence denotes a tree-address path in the tree of XML elements, starting from the XML element associated with the CST node at position `n`.

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