Would it be possible to also import the value of the dc:identifier from an RSS feed?

Feeds already imports fine from other fields like dc:creator but i have looked at the code and i cannot se how to add the extra field. Specifically in the feeds i am importing have a dc:identifier field a DOI value that i want like this:

<dc:identifier>info:doi/10.1177/0269215513500451</dc:identifier>

Thanks in advance for any hints