Add Metadata in Illustrator

Hi All,

We need to add metadata to illustrator files.

Grab information from .csv and store it as variables like as below.

var _docTitle = "AAAAAA";

var _author = "Mr.XXX";

var _descrip = "CCCCC";

Try my best by using xmpFile, but not succeed.

My requirement is as like as below screenshot

In Photoshop (this should be straight forwarded):

app.activeDocument.info.caption= "bb"; 

app.activeDocument.info.captionWriter= "cc"; 

app.activeDocument.info.headline= "dd"; 

app.activeDocument.info.instructions= "ee"; 

Kindly help for the above request.

Thanks in Advance