Q:

What is the intended use for the Oneness tag?

A new question was recently posted which makes use of a little-used tag called oneness.  I had never seen that tag before, so I was curious about whether or not it was actually appropriate for that particular question, which was just a very general non-trinitarian question.  The short summary of the tag currently says:

Oneness refers to the doctrine that God is One and should be used for questions about this theology and movements that adhere to it.

That does make it sound like it would be applicable.  That makes it sound like it is appropriate for all non-trinitarian questions.  The full description of the tag, paints a more specific picture, however:

Oneness refers to the doctrine that God is One, as opposed to the doctrine of the Trinity. Oneness adherents see One God manifest/revealed as Father, (in the) Son, and Holy Spirit. Whereas, Trinity adherents see One God (eternally) existing as three distinct persons: God, the Father, God, the Son and God, the Holy Spirit.

That makes it sound like it should only be used for questions related specifically to the doctrine of Sabellianism.  The questions that were previously actually tagged with it, though, paint an even more specific picture:

How does Oneness Pentecostalism interpret Matthew 3:17?
How do United Pentecostals and other Oneness groups interpret Hebrews 2:9?

Those questions make it look like the tag was really intended to specifically refer to questions related to the Oneness Pentecostalism movement.
As I see it, there are three possible solutions, but I'm unsure which is best:

Rename the tag to non-trinitarianism and fix the descriptions to match.
Rename the tag to sabellianism and fix the descriptions to match.
Rename the tag to oneness-pentecostalism and fix the descriptions to match.

Unless I'm mistaken, all non-trinitarian questions seem to get lumped, currently, under the trinity tag, since there is no non-trinitarianism or even a unitarianism tag.  That seems reasonable, on one hand, but then, on the other hand, in might be nice to have two separate tags to differentiate between the pro-trinitarianism and anti-trinitarianism arguments.  However, given the relatively high number of non-trinitarian questions that we get, perhaps it is worth breaking it up into separate non-trinitarian doctrines such as sabelianism, socinianism, and adoptionism.  That may be getting a bit too technically accurate, though, for most people to pick or find the correct tags.  Thoughts?

A:

I think it would make sense to rename oneness to oneness-pentecostalism; it's a well recognised and distinct movement within Christianity.
A potential issue with the other tags you've suggested is that modern proponents of beliefs which accord with those ancient labels might not like the association. They may even disagree that they do believe those heresies. Those tags are appropriate for discussions of those historical positions, but perhaps less appropriate for modern adherents, unless they self-identify as sabelian, etc.
I think a non-trinitarian tag would definitely be appropriate.

