Spurious import statements for generated elements that do not extend a supertype

[raner]

The @Dtd annotation on package pro.projo.generation.interfaces.test.html.baseclasses.otherpackage configures baseInterfaceEmpty=EmptyElement.class.

However, some elements that are declared EMPTY in the DTD do import the EmptyElement type but do not use it as a base type:

package pro.projo.generation.interfaces.test.html.baseclasses.otherpackage;
/* */
import javax.annotation.Generated;
import pro.projo.generation.interfaces.test.html.baseclasses.EmptyElement;
/* */
/**
*
* THIS IS A GENERATED INTERFACE - DO NOT EDIT!
*
**/
/* */
@Generated("pro.projo.generation.interfaces.InterfaceTemplateProcessor")
/* */
public interface Area<PARENT>
{
/* */

Other than for Area, this is also the case for Base, Img/ImgAlt/ImgSrc, and Optgroup (which is not actually an EMPTY element 🤔, which still begs the question why the type is imported).
However, other EMPTY elements (link, hr, br, col, ...) import the base type and correctly extend it, so clearly not all EMPTY elements are affected by this bug.

[raner]

Quite possibly the real problem is not the missing extends clause but actually the spurious import:

****** superType of img is pro.projo.generation.interfaces.test.html.baseclasses.EmptyElement
****** InterfaceTemplate: Img<PARENT>
****** InterfaceTemplate: ImgAlt<PARENT>
****** InterfaceTemplate: ImgSrc<PARENT>
****** InterfaceTemplate: ImgAltSrc<PARENT> extends EmptyElement<PARENT>

Since Img/ImgAlt/ImgSrc are "incomplete" they should not offer whatever navigation facilities are provided by the EmptyElement base class. The same is true for Area, which has a mandatory alt attribute, so only AreaAlt should extend EmptyElement. This also applies to Base (mandatory href) and Optgroup (not an empty element, but mandatory label attribute).