struct _xml_data
{ 
   char *title;
   char *url;
   char *author;
}; 

typedef struct _xml_data xml_data;

Evas_List *something()
{
   Evas_List *themes = NULL;

   while(some_condition)
   {
      xml_data *theme;

      theme = calloc(1, sizeof(xml_data));
      theme->title = strdup(exml_value_get(..., "title", ...));
      theme->title = strdup(exml_value_get(..., "url", ...));
      theme->title = strdup(exml_value_get(..., "author", ...));

      themes = evas_list_append(themes, theme);
   }

   return themes;
} 

/*
 * dont forget to free things when you are done
 */