seo - <Header> tag HTML5 inside div -

Just wondering, inside a div tag, & lt; Header & gt; Bad behavior to keep tags when designing a site that mostly uses html5 elements and has the functionality for html5? Thanks!

In addition to this, do I make any difference to the nava outside or inside the top, or really?

No, not strictly, but there are some relevant meanings under other elements other than the body Header embedded. Depending on how you make the document, you can run in unpredictable behavior, see below.

HTML5, as far as I can tell, is a DTD-less document type. The strict rule does not apply because it is in connection with the verification of the document structure. According to the W3C document on html5

Represents. A header typically has a group of introductory or navigational aids.

Actually, what it seems to indicate, if header element is directly body of the document Under, it applies to the page as a whole, but if under any other element that recognizes a section, then header applies more specifically to the closest ancestors.

However keep in mind that a and

gt; is not a sectioning element as it has been originally described, I originally thought it was. If you want your header to be applied to a specific part of the page, it would be best to include one of the defined definition elements in the header, as defined here:

example

  & lt; Div & gt; & Lt; Section & gt; & Lt; Header & gt; ... & lt; / Header & gt; & Lt; / Section & gt; & Lt; / Div & gt;