Here is my situation:   I have 2 CPU module product pages.  Both pages
include a features table.  One row of this table is duplicated on both
pages.  I want to move the duplicated row into an include file.  Is it
possible to use an include file that does not have to be a complete
document?  I think this requires not validating the include file.

For example, here is one CPU module product page:

<table>
    <!-- unique rows -->
    <include href="duplicated_row.xml"/>
</table>

I want *duplicated_row.xml* to contain only the table row (*tr* element),
not a containing *table*, *body*, and *document*.

Is this possible?