src/main/resources/com/puppycrawl/tools/checkstyle/configuration_1_2.dtd

<?xml version="1.0" encoding="UTF-8"?>

<!-- Add the following to any file that is to be validated against this DTD:

<!DOCTYPE module PUBLIC
    "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
    "http://checkstyle.sourceforge.net/dtds/configuration_1_2.dtd">
-->

<!ELEMENT module (module|property|metadata)*>
<!ATTLIST module name NMTOKEN #REQUIRED>

<!ELEMENT property EMPTY>
<!ATTLIST property
    name NMTOKEN #REQUIRED
    value CDATA #REQUIRED
    default CDATA #IMPLIED
>

<!--

   Used to store metadata in the Checkstyle configuration file. This
   information is ignored by Checkstyle. This may be useful if you want to
   store plug-in specific information.

   To avoid name clashes between different tools/plug-ins you are *strongly*
   encouraged to prefix all names with your domain name. For example, use the
   name "com.mycompany.parameter" instead of "parameter".

   The prefix "com.puppycrawl." is reserved for Checkstyle.

-->

<!ELEMENT metadata EMPTY>
<!ATTLIST metadata
    name NMTOKEN #REQUIRED
    value CDATA #REQUIRED
>