| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Custom element in MathML namespace</title> | |
| <link rel="author" title="Aleksei Yu. Semenov" href="mailto:a.semenov@unipro.ru"> | |
| </head> | |
| <body> | |
| <math xmlns="http://www.w3.org/1998/Math/MathML"> | |
| <x-math-element id="x-math-element"></x-math-element> | |
| </math> | |
| </body> | |
| </html> |