> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/x.md).

# X

- [Xiaolin Wu's line algorithm](https://trizen.gitbook.io/sidef-lang/programming_tasks/x/xiaolin_wus_line_algorithm.md)
- [XML](https://trizen.gitbook.io/sidef-lang/programming_tasks/x/xml.md)
- [DOM serialization](https://trizen.gitbook.io/sidef-lang/programming_tasks/x/xml/dom_serialization.md)
- [Input](https://trizen.gitbook.io/sidef-lang/programming_tasks/x/xml/input.md)
- [Output](https://trizen.gitbook.io/sidef-lang/programming_tasks/x/xml/output.md)
- [XPath](https://trizen.gitbook.io/sidef-lang/programming_tasks/x/xml/xpath.md)
- [XML validation](https://trizen.gitbook.io/sidef-lang/programming_tasks/x/xml_validation.md)