The last example just before 19.2 is the following:

<xsl:transform version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:mode name="delete-ednotes" streamable="yes" on-no-match="deep-copy"/>

<xsl:template name="main">
   <xsl:stream href="book.xml">
      <xsl:apply-templates mode="delete-ednotes"/>
   </xsl:stream>
</xsl:template>

<xsl:template match="ednote" mode="delete-ednotes"/>

</xsl:transform>


The text explains that this will remove any ednote elements. However, I think it only removes ednote when it is the root element of book.xml. The reason being that the effective mode deep-copies all nodes that are not matched, which means that when a match is not found, the whole subtree it copied and not processed further.

I think the correction should be to change deep-copy to shallow-copy and the result of the transformation will be what it should be: ednote elements are removed.