Supressing fields without data in IDOC

Hi ,

I am new to IDocs and we have a requirement.

when we are sending some IDOCs (ARTMAS05), the size of the file comes to around 2 MB and the frequency is hourly.

We do not need all the fields. Is there any way where we can suppress the fields which are without data and send only those fields that are filled with data.

Sreekanth