<?xml version="1.0"?>
<database>
<goods>
<num>1</num>
<price>1000</price>
<availability>1</availability>
</goods>
<goods>
<num>2</num>
<price>2000</price>
<availability>1</availability>
</goods>
<goods>
<num>3</num>
<price>3000</price>
<availability>0</availability>
</goods>
</database>