[Developers] timestamp uniqueness

[augusto callejas]

another way i could ask my question is
what guarantee is there for links that have
the same timestamp up to the millisecond?

empirically, i have seen two types:

1) the update of a unique property that results in a delete link  
followed by an insert link.
2) insert of a new node that results in a series of insert links


On Apr 17, 2009, at 12:11 PM, augusto callejas wrote:

> hi-
>
> i've noticed when a unique property is updated,
> that a delete occurs followed immediately by an
> insert, with timestamp value +.0001.  (this insures
> the same timestamp up to the millisecond value)
>
> my question is if another unique property is
> immediately updated afterwards, will its
> delete/insert links have a unique timestamp
> up to the millisecond value compared to the
> previous timestamp?
>
> that is, would i expect link timestamps like:
>
> 2008-08-20T05:27:45.0000Z delete
> 2008-08-20T05:27:45.0001Z insert
> 2008-08-20T05:27:45.0010Z delete
> 2008-08-20T05:27:45.0011Z insert
>
> first two delete/insert have same timestamp up to the millisecond  
> value,
> while last two delete/isnert have same timestamp up to the millisecond
> value.
>
> or could i see:
>
> 2008-08-20T05:27:45.0000Z delete
> 2008-08-20T05:27:45.0001Z insert
> 2008-08-20T05:27:45.0002Z delete
> 2008-08-20T05:27:45.0003Z insert
>
> all delete/inserts have the same timestamp up to the millisecond  
> value.
>
>   {
>     "master_property" : "/business/company/founded",
>     "operation" : "delete",
>     "source" : {
>       "guid" : "#9202a8c04000641f8000000005f43a01"
>     },
>     "target_value" : {
>       "value" : "2006-08"
>     },
>     "timestamp" : "2008-08-20T05:27:45.0000Z",
>     "type" : "/type/link",
>     "valid" : null
>   },
>   {
>     "master_property" : "/business/company/founded",
>     "operation" : "insert",
>     "source" : {
>       "guid" : "#9202a8c04000641f8000000005f43a01"
>     },
>     "target_value" : {
>       "value" : "2007-08"
>     },
>     "timestamp" : "2008-08-20T05:27:45.0001Z",
>     "type" : "/type/link",
>     "valid" : true
>   }
>
> thanks,
> augusto.
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