Did you ever got to implement XML parser? Perhaps for atom, or scap? You may have got XSD (XML Schema Definition) files to verify adherence to given xml application? Wouldn't it be cool to ...

A project for the course of Information Retrieval @CS_AUEB Main Class Converter.java Reads the doc-term.txt and converts it into a valid .xml document Main Class TermFrequency.java Reads an .xml file ...