How to use tika...

gistfile1.txt

1) Download tika-app-1.3.jar from here http://www.apache.org/dyn/closer.cgi/tika/tika-app-1.3.jar
2) Move it from Downloads to somewhere more useful. I created a folder called work.
3) The tika jar is actually an application. So, you can now either 
        a) Double-click on it to start it up. You'll get a little ui, and drag a file into the window.
                You can use the view menu to switch type of output, text, xml etc

        b) Use it as part of a program. Open a command-prompt (Applications,Utilities,Terminal)
                cd to the folder where you put the jar
                type java -jar tika-app-1.3.jar -x [filename] where [filename] is the file you want to read.
                -x gives you xml, -t text etc.