Jquery mobile data-?

Is data-theme or data-role belong to html5? If it 开发者_运维技巧isn't belong html how browser render it without knowing this attribute? Can I add a new attribute to html document and say browser "render this like that" ?

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This link is telling that:

data- attributes are a wonderful new feature of HTML5 that let you add any attributes you like to an element. All you have to do is start your attribute name with the data- prefix.