[Developers] Steps Toward a Complete History Export in Freebase

[John Giannandrea]

Kurt Bollacker wrote:
> The problem is in specifying the "valid" property of links.  Live
> properties are "valid":true, replaced properties are "valid":false,
> and deleted properties are "valid":null.  So it's not possible to ask
> for deleted links directly.

yes, its a bug that you cant ask for only deleted links, and that you  
cant mix operation:null with valid:false.
I could not find the previous bug you said you filed, so I opened https://bugs.freebase.com/browse/MQL-538 
  to track this.

You can, however, get all link changes, including deletes with this  
query:  http://tinyurl.com/nntmcv

-jg