code: @Nonnull
    public static Document newDocument (@Nonnull final String sQualifiedName,
                                        @Nullable final String sPublicId,
                                        @Nullable final String sSystemId)
    {
      return newDocument ((EXMLVersion) null, sQualifiedName, sPublicId, sSystemId);
    }
docs: Create a new document with a document type using version
  {@link EXMLVersion#XML_10}.
  
  @param sQualifiedName
  The qualified name to use.
  @param sPublicId
  The public ID of the document type.
  @param sSystemId
  The system ID of the document type.
  @return The created document. Never <code>null</code>.