DOM 树模型示例 bibliography <bibliography> book < book isbn=“111”> <title> XML </title> isbn○ <author> hull </author> title autor author publisher/year <author> vianu </author <publisher> Wesley <publisher> <year> 1995 </year XML Hull Vianu Wesley 1995 </book> </bibliography>DOM <bibliography> <book isbn=“111”> <title> XML </title> <author> Hull </author> <author>Vianu </author> <publisher> Wesley </publisher> <year> 1995 </year> </book> … </bibliography> bibliography book isbn 111 title author author publisher year XML Hull Vianu Wesley 1995 ◼ 树模型示例