handle @pre tag
diff --git a/pom.xml b/pom.xml
index 21ba844..21b7470 100644
--- a/pom.xml
+++ b/pom.xml
@@ -619,6 +619,11 @@
                 <placement>a</placement>

                 <head>Requires Project:</head>

               </tag>

+              <tag>

+                <name>pre</name>

+                <placement>X</placement>

+                <head></head>

+              </tag>

             </tags>

             <!-- TODO: This should only be a measure of last resort -->

             <failOnError>false</failOnError>