This is a bad re-purposing of the word "tag", which already has specific meanings in computing.

Why do we need a new word for this? Why not just call it a "script" or "code snippet"?

generic-sounding term may be interpreted as something more specific than intended: I want to be able to use "data interchange" in the most general sense. But if people interpret it to mean this specific standard/protocol/whatever, I may be misunderstood.

The definition given here

is the concept of businesses electronically communicating information that was traditionally communicated on paper, such as purchase orders and invoices.

limits it to things that were previously communicated on paper. But what about things for which paper was never used, like the interchange of consent and consent receipts for GDPR/privacy law compliance, etc.?

The term should be allowed to be used just as well for newer technologies/processes that had no previous roots in paper technologies.

From what I remember in History of English Language, language has been defined more broadly since Sheridan's day, if language was really strictly defined to words. I think language is now considered as a system of intentional, conventional signs. Unfortunately, animals and the "melancholy mournings of the turtle" (shoutout to kpolizzi and gilmanhernandez) are not considered language within this definition. This reading and the definition of language from the HOEL textbook by Algeo both heavily emphasized oral-aural communication, so I'm curious about the deaf community's perspective on language. Also I was definitely not expecting to bring up disability as much as I have been; I can try to limit my annotations on that subject.