- url(r'book/(?P<id>\d*?)/info\.html$', 'catalogue.views.book_info'),
- url(r'tag/(?P<id>\d*?)/info\.html$', 'catalogue.views.tag_info'),
+ url(r'book/(?P<book_id>\d*?)/info\.html$', 'catalogue.views.book_info'),
+ url(r'tag/(?P<tag_id>\d*?)/info\.html$', 'catalogue.views.tag_info'),