shell> curl -X DELETE --header 'If-Match: "227105"' --dump - http://localhost:8529/_api/document/products/227101
HTTP/1.1 412 Precondition Failed
content-type: application/json; charset=utf-8
etag: "227101"
{
"error" : true,
"code" : 412,
"errorNum" : 1200,
"errorMessage" : "precondition failed",
"_id" : "products/227101",
"_key" : "227101",
"_rev" : "227101"
}