Ruby Way using Rexml parsing xml

Rexml is a processor written entirely in Ruby, with a variety of APIs, two classic APIs that are distinguished by dom-like and sax-like. The first is to read the entire file into memory and then store it as a layered form (that is, a tree). The second is "parse as you Go", which is more appropriate when your files are large and memory is limited.

Look at the following book.xml:

Reference

 <library shelf= "recent acquisitions" > <section name= "Ruby" > <book isbn= "0672328844" > <title>the Ruby way</title> <author>hal fulton</author> <descriptio N> Second Edition. 
　　　　　　　　　　　 The book is are now reading. 
　　　　　　　 Ain ' t recursion grand? </description> </book> </section> <section name= "Space" > <book ISBN = "0684835509" > <title>the case for mars</title> <author>robert zubrin</a 
　　　　　　　　　　　 Uthor> <description>pushing toward a second home for the human race. </description> </book> <book isbn= "074325631X" > <title>first man:t His life of Neil A. armstrong</title> <author>james R. hansen</author> <desc Ription>definitive Biography of thE-Man on the moon. </description> </book> </section> </library>