What is the meaning of 'activetx' in the apache predvar table?

[tohokulgq]

hello! I want to know the meaning of 'activetx' in apachepredvar table.

Because i am doing the machine learning research right now and 'activetx'is the most important variable after the analysis of the machine learning model, but there are less explanation of this character.

Your answer will help me a lot! !