The <node> element embodies the hierarchical relationship of elements in a scene.
by declaring a point of interest in a scene.
A node denotes one point on a branch of the scene graph.
The <node> element is essentially the root of a subgraph of the entire scene graph.
Within the scene graph abstraction, there are arcs and nodes.
Nodes are points of information within the graph.

Nodes are further distinguished as interior (branch) nodes and exterior (leaf) nodes.
COLLADA uses the term node to denote interior nodes.


タグ名 instance_geometry geometry
属性名 url id


タグ名 instance_material material
属性名 symbol name
属性名 #target id

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