{#- Based on https://github.com/11ty/eleventy-base-blog/blob/main/content/sitemap.xml.njk
<!--section:code-->```twig -#}
<?xml version="1.0" encoding="utf-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
  {%- for page in collections.all %}
    {% if page.data.permalink != false %}
      <url>
        <loc>{{ site.base }}{{ page.url }}</loc>
        <lastmod>{{ page.date|date('c') }}</lastmod>
      </url>
    {% endif %}
  {%- endfor %}
</urlset>
{#```
<!--section:docs-->
Render from a standalone route/template that outputs `application/xml`:

```twig
{% include 'blades/sitemap.xml.twig' %}
```

`date('c')` emits an ISO-8601 `lastmod`, which is what the sitemap spec expects.
<!--section--> #}