In Digimon World DS how do you acturly catch a Digimon

How to catch a Digimon in DigimonWorldDSI believe after you have seen a Digimon around 10 times you will have gathered enough data to create your own 'copy'. When you get a digimon farm and you get this list. Go to the second picture and go down to digiconvert, and if you have enough data you can make one.
It also depends on which rank you are.