Look into the TC field.

On the other hand, you do not need to add a line in a particular style, but rather apply that style to your existing paragraph. The style can have the same appearance as any of your other styles.

The problem is that I may have to "attach" multiple tags (styles) to the same paragraph. That is, that paragraph may apply to more than one of my categories. I believe it is possible to assign styles to words, but that seems like a nightmare to maintain.

I think I need to look into macropod's index suggestions.

Thanks