Cross references \link{} on help pages can currently be to files or alias (\alias{}).
R recommends to use alias, as if the function or alias moves around the link will point to the new page.

In R-devel there is an environmental variable to warn on these cases.
I open this issue for your consideration for future Bioconductor releases to use _R_CHECK_XREFS_MIND_SUSPECT_ANCHORS_=true.
This would help when building html help pages for Bioconductor packages.