From MegaZine3

This tag is basically a "macro" for easier creation of spread pages. For more flexibility, use two Page tags with the spread attribute set to true.

This element allows to create "spread pages", i.e. a double page with shared content. This way one can use a video at the center of a double page, for example.

What this element technically does, is create two pages and sets their attributes correctly. Furthermore, it force inserts a blank page before the spread page, if necessary.

[edit] Attributes

All attributes of the page are supported and will be applied to both the left and the right side of the spread page. The only exceptions are the page@buffer (which is applied to the left side only, the right one will always be buffered), and the page@stiff attribute (if the right side should be stiff set it's opposite's side to be so).

[edit] Example use

<book>
  <chapter>
    <page/> <!-- Note: possible to remove this tag, but will be added
                 automatically, because the two sides of a spreadpage
                 obviously must be next to each other. -->
 
    <spreadpage foldfx="0">
      <vid src="some/vid.flv" position="center middle"/>
    </spreadpage>
 
    <page/> <!-- Note: possible to remove this tag, but will be added
                 automatically, because a page must always consist of
                 two page sides (and the right half of the spreadpage
                 will make up the first half). -->
  </chapter>
</book>