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DELETE Idempotency
DELETE needs to be idempotent
Won’t be for positional deletions
Similar issue with insertions
Solution
URI has to have two properties
Identifies one resource before delete
Identifies no resource after
Inverse of insertion
       contenta       contentc   
DELETE
foo/bar[2]
       contenta      contentb      contentc   
DELETE
foo/bar[2]
       contenta   
PPT Version