Tags vs Classifier

[grokys]

There appear to be two "modern" ways to provide syntax highlighting for languages in VS: classifiers (IClassifier) and taggers (ITagger<T>) but no guidance about when one or the other should be used. This example uses a tagger to provide classification whereas this example uses a classifier.

I tried to understand when to use each over in the docs repository last year but got no feedback, so asking here to see if I fare any better.

• When should i use a tagger over a classifier?
• Can the two be mixed?
• Are classifiers implemented in terms of taggers anyway?