I'm trying out the batch import feature for the first time and am confused by the creation of dc fields that end in [en_US].
Here is an example, this being metadata dumped via metadata-export. The first item was submitted through the xmlui interface. The second was submitted via the batch 'import' command.
I'm not sure why the second item has its issue date in a dc.date.issued[en_US] field. I only see the [en_US] notation on the field when batch editing metadata, and not when editing the item in the xmlui interface. In the xmlui edit item interface it still says dc.date.issued.
I did not use a language qualifier on the batch import dublin_core.xml, e.g.
<dcvalue element="date" qualifier="issued">2011-01-26</dcvalue>
Is the [en_US] really a separate field? Is it some artifact of batch importing and editing? Any pointer where this is explained would be appreciated.