why is www.mydomain.com/index.php/reports/report1 mapped to index.php ?

[eluser]Unknown[/eluser]
yes there is an entry in httpd.conf (and only there):

<IfModule dir_module>
DirectoryIndex index.php index.html
</IfModule>

However the docu says :"The DirectoryIndex directive sets the list of resources to look for, when the client requests an index of the directory by specifying a / at the end of the directory name." Hmm .. if I request www.mydomain.com/index.php/reports/report1 should I not request the directory "index.php/reports/report1/" which doesn't exist and that should return a "file not found error" ?