The basic elements of a blog post are:
• Author : the person who wrote the blog post.
• Blog post title : the title of the blog post, which is usually used to create a unique URL, or permalink, for the blog post.
• Tag : tags are the categories used to describe the blog post, and aid services such as Technorati in categorising blog posts.
• Comment : comments left by readers of the blog are shown with the blog post.
• TrackBack : a notification of other blogs linking to a post, often displayed below blog post