XML by Example

<price delivery=”5”>999.00</price>

<price delivery=”15”>899.00</price>

</vendor>

but it would ignore the contact information. In general, it’s a good idea to

simply ignore unknown elements. Doing so provides more flexibility when

the document evolves.

Enforce a Structure

It’s not difficult to enforce a specific structure. The following code snippet

checks the structure and throws a SAXException if a vendor element con-

tains anything but name or price elements.

case VENDOR:

if(name.equals(“name”))

{

state = VENDOR_NAME;

currentElement = new LeafElement(name,attributes);

}

else if(name.equals(“price”))

{

state = VENDOR_PRICE;

currentElement = new LeafElement(name,attributes); ...