RSS feed(A distribution mechanism for frequently-updated content that is aggregated by an RSS reader and delivered or published in a standard XML format. The content is often summarized, with links to a more complete version)
channel(A path through which information passes between two computers or devices. It can refer to the physical medium (such as wires) or to a set of properties that distinguishes one channel from another)
XML feed(A distribution mechanism for frequently-updated content that is aggregated by an RSS reader and delivered or published in a standard XML format. The content is often summarized, with links to a more complete version)