Code for ext to read xml of two structures_YUI.Ext related

Software 1
1.gif


Control 2
2.gif


This is more common and many examples on the Internet are like this Format, I will also write the main code
var Info= Ext.data.Record.create([
'name', 'icon''
]);
reader=new Ext.data. XmlReader({
record: 'software',
id: 'name'
}, Info);
The following is another format of xml





Main code for reading
var Info= Ext.data.Record.create([
{name: 'name ', mapping: '@name'},
{name: 'icon', mapping: '@icon' }
]);
reader=new Ext.data.XmlReader({
record : 'software',
id: 'name'
}, Info);
ext's help document only has the first way of writing it, and it took me almost two hours to find the second way. The method, I don’t know the reason yet, but it works. I hope an expert can explain it to me. I'm all ears!