Questions about footnotes

I have three questions about footnotes from an XSL FO persective:

1. The first is off-topic to XSL, but I expect to find the knowledge among
you. If a footnote number appears at the end of a sentence, should it be
before or after the period? I've seen both. Is it a matter of culture? Do
you prefer this?

  ...and a footnote.^1 Some more text...

Or this?

  ...and a footnote^1. Some more text...

What about footnote numbers before/after comma or colon? Or do you always
put footnotes numbers at the end of the sentence?

2. Sometimes there are more footnotes on one sentence:

  ...and three footnotes.^[1, 2, 3] <-- This means everything 
                                        inside the brackets are
                                        in superscript.

The markup (abbreviated) may look like this:

  <p>...and three footnotes.<note/><note/><note/></p>

So I need to put ", " between these. I've tried several ways, like:

  <xsl:if test="following-sibling::not[1]">
  <xsl:if test="local-name(following-sibling::*[1]) = 'not'">

Which is right?

3. I forgot the third question while writing. It will pop up when I send this.

Gustaf



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