Pull data and remove old data

Hi.
I would like to realise this:

Pull an xml file like this:
<jobs>
<jobcode>
<jobname>
<description>
<etc.>
</jobs>

i would like to pull the records from the file and display everytime just the jobs which are in the file.

Now my problem:
Only the data which is in the file should be listed, so everything which was imported before and isn´t in the file now, should be deleted.
So i need a full delete of all post everytime the new data will bei imported.
Or is there a possibility with the plugin to realise this?

thanks in advance,

Andre

https://wordpress.org/plugins/feed-pull/