can we add a extended schema on adobe campaign standard to the table Test_profiles (nms:seddMember) ?
i need to add additional field related to another table Card to make some values from Card display on my delivery with some of my test profile
Yes you can extend the default sedMember table and create a link between the extension and the Card table. Another solution would be to test your delivery with a real 'fake' profile. It could be easier if you manage complex database relations.