Django Sitemap not returning items

I have a basic sitemap created. However I'm looking to make it more Google compliant.

I have a queryset that works however when I try and access the url.items in my custom template I only get the default 'priority', lastmod etc...

Sitemaps.py

from django.contrib.sitemaps import Sitemap

from myapp.models import *

class mySitemap(Sitemap):
    changefreq = "daily"
    priority = 0.5

    def items(self):
        articles =
            sync_Binder.objects.select_related() \
            .filter(sync_binder_index__p开发者_如何学Pythonlatform_id > = '2') \
            .order_by('sync_binder_index__rank')
        return articles

    def lastmod(self, obj):
        return obj.modifieddate

urls.py

sitemaps = {'mysitemap': mySitemap,}

urlpatterns = patterns('django.contrib.sitemaps.views',
    (r'^%ssitemap.xml$' % PROJECT_URL, 'sitemap',
        {'sitemaps':sitemaps, 'template_name':'sitemap.html'}),
)

sitemap.html contains the following loop

{% for url in urlset %}
    {{ url.items }}
{% endfor %}

...yet I only get the defaults nothing from my articles query set which contains images, headlines etc

Any suggestions?

Thanks S