The HTML <link> element is used to specify relationships between your web document and other external file resources. This tells the browser software to fetch that resource and apply it to your page according to what type of link it is. This is a Void Element so it does not get a closing tag like most elements.
href - specify the URL of the target file to link in the document
Possible Values: "relative or full URL string"
rel - specify the relationship(s) between the external file and your document
Possible Values: "space separated list of link types"
rel Link Types: "alternate", "archives", "author", "first", "help",
"icon", "index", "last", "license", "next", "pingback", "prefetch",
"prev", "search", "stylesheet", "sidebar", "tag", "up"
hreflang - specify the language of the target external file
Possible Values: "valid language tag"
media - specify the media type of the target external file resource
Possible Values: "aural", "braille", 'handheld", 'print", "projection",
"screen", "tty", "tv"
type - specify the MIME type of the target external file resource
Possible Values:"a valid MIME type tag"
sizes -specify icon sizes if the link type is icon
Possible Values: "any", "space separated size list(example: 16x16 32x32 48x48)"
global event handlers - global event handler attributes
See: list of global event handlers
