[ensembl-dev] Ensembl ID History Converter (IDmapper.pl) API inconsistent with web tool

[Lucas Swanson]

Hello,

I have a large number of old Ensembl gene IDs for which I want to 
determine the corresponding IDs in the latest release. The Ensembl FAQ 
pointed me to the ID History converter. However, I am noticing some 
inconsistencies between the web tool and the downloaded API (which I 
will need to use since I have more than 30 ids).

The API version used is 67
$ echo "ENSG00000164012" | 
/home/lswanson/ensembl/id_history_converter/IDmapper.pl -s human
Old stable ID, New stable ID, Release, Mapping score
ENSG00000164012.1, ENSG00000164012.1, 7, 0
ENSG00000164012.1, ENSG00000164012.1, 10, 0
ENSG00000164012.1, ENSG00000164012.1, 14, 0
ENSG00000164012.1, ENSG00000164012.1, 15, 0
ENSG00000164012.1, ENSG00000164012.1, 18.2, 0
ENSG00000164012.1, ENSG00000164012.1, 18.1, 0
ENSG00000164012.1, ENSG00000164012.1, 21, 0
ENSG00000164012.1, ENSG00000164012.1, 26, 0
ENSG00000164012.1, ENSG00000164012.1, 27, 0
ENSG00000164012.1, ENSG00000164012.2, 38, 0
ENSG00000164012.2, ENSG00000164012.3, 40, 0.666667
ENSG00000164012.3, ENSG00000164012.4, 55, 0.586106
ENSG00000164012.4, ENSG00000164012.5, 56, 0.738542
ENSG00000164012.5, <retired>, 61, 0

But when I enter ENSG00000164012 into the web tool, I get the results in the attached screenshot.

Why does the API not return any mention of "ENSG00000117395", which is 
what I would like since it is actually still active, while 
"ENSG00000164012" has been retired?

Also, I am uncertain about the "Mapping score" column in the API output. 
What does it represent, and is a higher number better, or is a lower 
number better?

~Thank you,
Lucas Swanson

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