Clarification needed on AND vs. OR for tag-list spec

[evictor]

Please include a note on whether a list of tag names is ALL- or ANY-type match (AND or OR) wherever that appears. I.e., does a file need to have all the tags specified in the list, or just ≥1?

Relevant area where a note would make sense:

Wherever a "tagname" is expected, a list of tags may be provided. They must be comma-separated.

as seen under Advanced Usage