Query on XML data using XQuery.

The following queries are performed using XQuery and then run against the file auction.xml using Zorba:

Print the number of items listed on all continents. List the names of items registered in Europe along with their descriptions. List the names of persons and the number of items they bought. List all persons according to their interest (ie, for each interest category, display the persons on that category). Group persons by their categories of interest and output the size of each group. List the names of persons and the names of the items they bought in Europe. Give an alphabetically ordered list of all items along with their location. List the reserve prices of those open auctions where a certain person with id person3 issued a bid listed before another person with id person6.