colgroup ... ⁄colgroup, optional element

The colgroup element is optional

Examples syntax:

Valid Syntax
colgroup element present
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17	<!doctype html> <html> <head> <title>...</title> </head> <body> <table> <caption>...</caption> <colgroup span="2"> <thead> <tfoot> <tbody> </table> </body> </html>

Valid Syntax
colgroup element absent; optional element
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16	<!doctype html> <html> <head> <title>...</title> </head> <body> <table> <caption>...</caption> <thead> <tfoot> <tbody> </table> </body> </html>