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Demonstrating A Regular Expression With Subpatterns

A Regular Expression From Regular Expressions (Subpatterns)

Strings That Will Match The Above Expression

Click on one of the table element tags below. The regular expression subpatterns that match that string will be highlighted.

• The constant characters (< and >) will remain black. These are always matched.
• The matching first-level subpatterns (col and its alternate) will be green and bold.
• The matching second-level subpatterns (c... and t...) will be olive and underlined.
• The matching third-level subpatterns (aption, olgroup, able, body, foot, [dhr]>) will be brown and in italics.
• The matching character in the character set [dhr] will be navy with an overline, as will the end tag character sequence (\/?) if it applies.