I'm looking for the best practice for how to include "Other" files (particularly ZIP archives and Microsoft Excel spreadsheets) in our publication output. I can store these files in the repository in an "Other" type folder and then link to them via a DITA XREF element. However, that alone does not actually include the referenced file in the output (at least, without some modifications to the DITA-OT or other SDL publishing engine).

I can 'embed' the referenced file using a DITA image element (and then wrap that in a draft-comment to 'hide' it), but that seems like a sub-optimal workaround. Sure there is a standard way to support including these files in the output so that an end-user could click a link to save/open the referenced file, but I have yet to locate any documentation on the feature (possibly in part because a non-descriptive name such as "other" doesn't really lend itself to searching).

Thanks in advance for any advice you can offer.