Ability to filter / analyse by tags in surveys

A previous survey tool I used allowed us to add tags to open text questions and then use those tags to undertake further cross tab analysis. The tag feature on EHQ sits as a stand alone tool which means it is not as useful. For example, I cannot easily cross reference my tagging / coding framework with other survey data i.e. to understand whether people from a certain area of the city or demographic feel a certain way compared others .