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How can I avoid traversing a subtree while tree parsing? Is there an operator or command for this?

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How can I avoid traversing a subtree while tree parsing? Is there an operator or command for this?

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Location: http://www.jguru.com/faq/view.jsp?EID=89 Created: Sep 3, 1999 Author: Terence Parr (http://www.jguru.com/guru/viewbio.jsp?EID=1) Use the wildcard “placeholder”, which lets you label the subtree, but the tree parser does not descend into the subtree to parse it.

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