Why we use pubDate, source and title element in RSS?
We use also <pubdate>, <source> and <title> elements with in <item> child element. Where as, <pubDate> element is used to define the last publication date of an item. <source> element is used to define the third-party source of an item. <title> element is used to define the title of an item. In above elements <pubDate> and <source> are optional where as <title> is compulsory when we define RSS document.