# X

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