Since we’re talking scripting and thus the DOM Using orthogonal data for searching allows both forms of the telephone number to be used, while only the nicely formatted number is displayed in the table. I can’t see where Chris referred to the data attribute being site-specific (but it’s late and I may have missed it). With these key concepts in mind, let’s take a look at some simple markup that will show these ideas in action. If a user does not have the extension installed it will still load the framework from the Web, so there is nothing wrong there. What will be the issue? data-html5doctor-height or data-my-plugin-height. For a complete list of HTML5 Tags and related attributes, please check our reference to HTML5 Tags. I have an HTML table of data that can be sorted, ascending and descending, with AJAX by clicking on the column headers. The advent of HTML5 introduced a new attribute known as 'data'. I implore you to rid your mind of that thought immediately and continue reading.