Updating one or more tags across multiple documents at once

[RyanBuhrWA]

We have a need to be able to update one tag across multiple documents all at once. One method would be to allow sending a list of document IDs in the body of a POST or PATCH along with the tag info we'd want them all to have. A more convenient method would allow for sending other tag criteria by which to identify all the documents that need the new or updated tag(s).
Something like

{
    "getDocumentsByTag": {
        "key": "category",
        "value": 47
    },
    "newOrUpdatedTags": [{
        "key": "authorName",
        "value": "Doe, John"
    }]
}

would result in all documents that have the category tag with a value of 47 receiving a new tag called authorName with value "Doe, John", or if they already have the tag, its value would just be updated.

[mfriesen]

Adding new API

PATCH /documents/tags
{
"match":
{
"tag":
{
"key": "category",
"value": "47"
}
},
"update":
{
"tags":
[
{
"key": "authorName",
"value": "Doe, John"
}
]
}
}

[RyanBuhrWA]

Awesome, thanks Mike!