<?xml version="1.0"?> <!DOCTYPE note PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"> <note><title>Upcoming Changes</title><para> Future versions of this feature may not be backward-compatible. Consider implementing the revised interface now. </para></note>