-<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook V5.0/EN" "http://docbook.org/xml/5.0/dtd/docbook.dtd">
-<chapter xml:id="deploying">
+<chapter xml:id="deploying" version="5.0.1"
+ xmlns="http://docbook.org/ns/docbook"
+ xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://docbook.org/ns/docbook https://docbook.org/xml/5.0.1/xsd/docbook.xsd">