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Using a heirarchical approach it would not be possible to skip over unneeded sections and then continue with the main thread of questioning. Consider for instance, filling out a tax return, where there are whole sections that are not needed for most tax-filers, but everyone needs to fill out a basic set of questions.

Although it is more complicated to form questions using the relational view, it is also more flexible.

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You should use hierarchical approach to branch out to the portions that contain relevant information. That way, there is no need to skip anything. For example, if you ask the users to specify whether they are married or not, that decision is going to take them to the different section of the hierarchical document. Same holds for any other point where the questionaire branches out.

There should be no need to skip any portions, providing that the hierarchical structure is designed properly in the first place.

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