Github user lewismc commented on a diff in the pull request:
https://github.com/apache/jena/pull/474#discussion_r221725050
--- Diff: jena-arq/pom.xml ---
@@ -216,6 +216,7 @@
</group>
</groups>
<bottom>Licenced under the Apache License, Version 2.0</bottom>
+ <additionalOptions>-html5</additionalOptions>
--- End diff --
If it is not included there is a ```WARNING``` message as follows
```
javadoc: warning - You have not specified the version of HTML to use. The
default is currently HTML 4.01, but this will change to HTML5 in a future
release. To suppress this warning, please specify the version of HTML used in
your documentation comments and to be generated by this doclet, using the
-html4 or -html5 options.
```
The -html5 additional option cleans up presence of ```WARNING```'s during
Maven build.
---
