[Genome] differences in annotation databases

[Aelterman Bart]

Dear,

I want to download the ENCODE Annotation Database to run some tests local. Apparently there are two ways to do this:
       - Download the Annotation Database from http://hgdownload.cse.ucsc.edu/goldenPath/hg18/encode/database/, or
       - Download the Test Annotation Database from http://hgdownload.cse.ucsc.edu/goldenPath/hg18encodedev/database/.
I find this rather confusing and the difference between these two databases is not explained in your documentation nor in the papers describing the ENCODE Annotation data. Could you tell me what the difference is and which one is the preferred reference annotation? I assume this would be the Annotation Database, but the existence of an undefined Test Annotation Database makes it a bit confusing.

Thanks in advance,

Bart Aelterman