nls.localize('tags.source','The source element allows authors to specify multiple alternative media resources for media elements. It does not represent anything on its own.'),
// 'When the source element has a parent that is a picture element, the source element allows authors to specify multiple alternative source sets for img elements.'
// 'When the source element has a parent that is a picture element, the source element allows authors to specify multiple alternative source sets for img elements.'
['src','type']),
track:newHTMLTagSpecification(
nls.localize('tags.track','The track element allows authors to specify explicit external timed text tracks for media elements. It does not represent anything on its own.'),