RAW is sensor data. It does not contain any post-exposure adjustments or edits. Any file that has any post-exposure edits or adjustments is not, and cannot be, RAW.
You refer to "the DPP edited RAW files". Such a file cannot exist. Once the RAW data has been converted to a viewable image file format, it is no longer RAW. In order for you edits to these files to be saved, your software must create a new file. This file cannot be RAW.
As William Lloyd implies, every use of a RAW converter produces an image format file. You select the image file format (e.g.: JPEG, TIFF). These image-format files can contain edits and adjustments. RAW files cannot.
A practical workflow using Aperture would be to use DPP for conversion and any edits you want to make, then export from DPP as 16-bit TIFF, and import the TIFFs into Aperture for storage and any other adjustments you want to make. The path through DPP is one-way, though: after you have created the TIFFs, you can't go back to DPP and change them.