Search syntax?

Is the search syntax documented anywhere? (More than it is on this support page.)

I was trying to search for items containing two particular tags and found that the following seemed to work:

=tag:tagA =tag:tagB

Since that suggested that the default might be to AND the search terms, I guessed at '&' as being the explicit conjunction operator:

=tag:tagA & =tag:tagB

and found that it gave (almost) the same result as before. That was cool, so I then tried to guess what the disjunction (OR) operator might be. At which point it all fell to bits, so much so that I suspect the answer to my question, "Is the search syntax documented anywhere?" might be "No", or even "What search syntax?"

But I thought I'd ask anyway.

---

1Password Version: 1Password for Mac 8.10.58 (81058041)
OS: MacOS Sequoia 15.2 (24C101)

---

1Password Version: Mac 8.10.58
Extension Version: Not Provided
OS Version: macOS 15.2
Browser: Not Provided