My XML language (through the use of tags) will first split the wonders up by the type or function of the wonder. It will then let you pick what wonder you are looking in that type. After that you can recieve the name, country of orgin, what city it is in, date completed, and importance.

XML Tag	Description
<Wonders> .... </Wonders>	Root of XML
<type> .... </type>	Type of Wonder
<Tomb> .... </Tomb>	The perpuse of the wonder
<TajMahal> .... </TajMahl>	Name of the Wonder
<Name> .... </Name>	The proper name of the wonder
<Country> .... </Country>	Country of orgin
<City> .... </City>	City the wonder is in
<Date> .... </Date>	Date the wonder was completed
<Importance> .... </Importance>	The importance of the wonder
<Pyramid> .... </Pyramid>	Short name for the Wonder

Example of XML file for 7 Wonders

An example of the tree diagram created by this file

If you were to look at the Taj Mahal you would follow this tree.

If you were to look at the Pyramids of Giza you would follow this tree.