Defining doctrine

The LDS Church recently released a statement about what constitutes doctrine. The following is an excerpt:

With divine inspiration, the First Presidency (the prophet and his two counselors) and the Quorum of the Twelve Apostles (the second-highest governing body of the Church) counsel together to establish doctrine that is consistently proclaimed in official Church publications. This doctrine resides in the four “standard works” of scripture (the Holy Bible, the Book of Mormon, the Doctrine and Covenants and the Pearl of Great Price), official declarations and proclamations, and the Articles of Faith. Isolated statements are often taken out of context, leaving their original meaning distorted.

What I find interesting is that they include proclamations as doctrine. Official declarations have been presented to the general body of church membership for an acceptance vote. Proclamations have not.

What do you think? Are proclamations doctrine, particularly when they contain tenets not found anywhere else? Is doctrine the same as canon?