Appropriate use of controlled language-based tags, which are coherent and represent information resources in the system.

A rapid decrease in the number and diversity of tags, including an increase of coherent tags representing information resources in the system.

Inappropriate use of controlled language-based tags, which result in inconsistent labels representing information resources in the system.

A rapid increase in number and diversity of tags, including an increase of incoherent tags representing information resources in the system.