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ETag and DELETE
Etag is associated with a resource (URI)
After DELETE, the resource doesn’t exist
Presumably 200 OK doesn’t carry Etag
Thus, you lose “track” of document after DELETE

Options
Document limitation
Put in Etag anyway
Empty resources
Empty Resources
A resource “exists” as long as parent exists and is not empty
To delete, you PUT it to empty
To insert, you modify from empty to content


PPT Version