sitemap.xml
```xml
https://www.example.com/
2023-10-01
monthly
1.0
https://www.example.com/about
2023-09-15
yearly
0.8
https://www.example.com/services
2023-08-20
monthly
0.7
https://www.example.com/contact
2023-10-05
yearly
0.5
```