Confluence parser doesn't support links to attachments

When I'm using xwiki rendering to parse confluence 1.0 markup such as: [^confluence.ppt], it returns me an link block which has reference is instance of DocumentResourceReference. It's quite strange that it's type is doc and it's reference is ^confluece.ppt, infact it must be AttachmentResourceReference object.
I doubt the engine somehow confuse at this step.