Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.
HTML issues tagged as tr.
A <table> contains a <tr> row that has less <td> columns than the column count established by the first row. Check the table to ensure all rows have the same number of columns.
For example, in the following table, the first <tr> row defines that it’s 2 columns wide, but the second <tr> row tries to use only 1 column:
<table> <!-- This first row sets the table as 2 columns wide --> <tr> <td>First</td> <td>Second</td> </tr> <!-- This second row has only 1 column --> <tr> <td>Wrong</td> </tr> </table>
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