Even though S3 doesn't support searching/filtering on tags, applications can still use tags to do client-side filtering.

• Directory placeholder for projects includes properties
• Directory placeholder for collection includes properties
• Every file inside a collection will return that collection's properties
• Despite AWS having a limit of 10 tags, 128 characters for keys and 256 characters for values, we will send all the tags without limits.
• Return the raw ids, no vocabulary interpretation
• Read only
• JSON values (such as lists) are returned in their JSON text representation