design decision: boldly adding information question


i need give users ability optionally supplement metadata documents. another proceed state fact users need supplement during slightest 5 categories document.



basically i wish boldly supplement metadata (or categories) request an ad hoc basis. here options i have guess of:



option 1:
should i boldly formulating new list columns database?



option 2:
should i interpretation 5 columns called attirbute1,attirbute2,attirbute3,attirbute4,attirbute5 following wholly arrangement user requires attributes.



option 3:
should i emanate metadata list keeps lane columns information compared them?



what cruise best proceed grasp this? cruise any ways simply supplement functionality. problem functionality needs unequivocally generic.



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