Header level Validation

Is there any possibility to do Header level Validation in Mendix I have done sheet-level validation according to the template it will be in a sequence if I interchange the columns also it should work on the basis of header content can we do this kind of validation?   2nd question  If there is an X column in 5th place on one sheet and in the second sheet same X is there in 10th place so it should go and validate directly to the 10th column total sheet should not be validated, Can someone help me with this solution or else should i write compulsary customlogic only?   Apart from Excel Importer do we have any Excel Reader in mendix?      
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