...when GitHub wiki can not escape XML tags

# Repeatable printable columns
## Excel XML

<Worksheet ss:Name="1">
  <Names>
   <NamedRange ss:Name="Print_Titles" ss:RefersTo="=1!C2,1!R3"/>
  </Names>

and

   <Row ss:Index="3" ss:AutoFitHeight="0">
    <Cell ss:Index="2"><Data ss:Type="Number">1</Data><NamedCell
      ss:Name="Print_Titles"/></Cell>
    <Cell><Data ss:Type="Number">2</Data><NamedCell ss:Name="Print_Titles"/></Cell>
    <Cell><Data ss:Type="Number">3</Data><NamedCell ss:Name="Print_Titles"/></Cell>
    <Cell><Data ss:Type="Number">4</Data><NamedCell ss:Name="Print_Titles"/></Cell>

## OpenXML ???
Seems impossible, at least in text realm.
http://stackoverflow.com/questions/13576555

## OpenDocument ???

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Float numbers:

# Excel XML
1. Space can go after the number but NEVER before it
2. "+12345" is possible, just like "12345"
3. Exponent can be both "E" and "e"
4. No thousand separator, decimal separator is always DOT

# OpenXML
1. Exponent can only be "E", "e" is read eroneously (Excel 2010)
2. Spaces around the value seem to work, maybe changing type to string, but at least page loada
3. zero can only be integer, not float for Excel 2003 - 2010: http://social.msdn.microsoft.com/Forums/en-US/oxmlsdk/thread/0f8a47df-a8e2-4519-a63d-b15c9725931e