These are generic storage terms and are therefore not explained in SF documentation. If you go to Windows Device Manager, select a disk and view Properties, you will see similar addressing for each device.
Port normally refers to the path
Target - scsi target assigned to the entire array
If I'm not mistaken, 'channel ' is same as bus.
The idea with 'stripe across' is to avoid striping within the same array, as striping is already done at hardware level.
Have a look at this Device Glossary: http://technet.microsoft.com/en-us/library/cc770791%28WS.10%29.aspx