[Zope] Naming files with a dot

Hello, Is there a problem with naming a page using a period instead of the under score as in "index.html" instead of "index_html". I'm just thinking for somebody typing in the url the dot is the normal way and provides one less thing to remember. This would only be for the DTML Documents? Not the DTML Methods or anything else, and probably even just the end documents (in other words not the headers and footers). Thanks for the information, --James