syntax(句法3).ppt

Structure RelationsIt turns out that many syntactic phenomena that make explicit reference to the geometry of Branch (分枝)A line connecting two or more parts of a Node (节点)The end of a Label The name given to a Root node(根节点): The node with no line on top of it .5 Terminal nodeAny node with no branch underneath Non-terminal nodeAny node with a branch underneath it. (1) Dominance :“ Node A dominates node B if and only if A is higher up in the tree than B and if you can trace a line from A to B going only downwards.”(2)A dominates ? C dominates ? B dominates? Root node:The node that dominates everything,but is dominated by nothing.