Maybe the question is a little confusing.
I will like to implement tags (similar to what is used in stackoverflow) in my web application. I will like to take a peak in any documentation, framework or schema made to be able to implement a tag strategy.
I can think of many ways of programmatically implement this, but since there are so many sites out there with the feature maybe there are a set of best practices that I can use to design my new version of software.