How to add Tags/associations within a PDF document?

Hello,

I don't know which community this question should go into so pardon me in advance.

OK, let me explain what I want. There are a few hundred questions in a PDF document labeled as 1, 2, 3, and so on. I was trying to put a tag to, for example, question 9 with Economic; question 10 with Cardiology; question 11 with Economic and Politics; question 12 with Politics, Cardiology and Economic.... and so on.

The reason for putting tags to each question is that if I wanted to read only those question which are related to "Economic", I should able to search "Economic" and either it should return with only those questions which have tags with "Economic" or I should able to jump question-by-question to those which have "Economic" tag associated with them.

Furthermore, it would be better if I could have an interactive and dynamic Table of Content or List of Tags at the beginning of the document so that I could see which Tags I have AND how many questions/points are associated/available to a particular tag. I said dynamic because if I add a new tag/association, that tag should automatically appear in Table of Content or List of Tags (preferably in alphabetical order).

I hope I have explained well.

I'd using Acrobat XI Pro.

Cheers