type specifies what the proposal is for, and replaces "project, policy, guideline, or process" verbatim.
status switches between specific statuses (if 'development', 'discussion', or 'consensus' is given), or otherwise replaces the status verbatim.
discussionpage is the location of the discussion/consensus gathering exercise; default is the talk page. Typically overridden when the discussion is held at RFC.
notes adds a note or comment below the main text.
Examples
{{proposed}}
The following is a proposed Wikimedia document. References or links to this page should not describe it as supported, adopted, common, or effective.
The proposal may still be in development, under discussion, or in the process of gathering consensus for adoption (which is not determined by counting votes).
{{proposed|type=something}} = "This is a proposed something."
The following is a proposed Wikimedia something.
The proposal may still be in development, under discussion, or in the process of gathering consensus for adoption (which is not determined by counting votes).
{{proposed|status=development}} = "The proposal is in development."
{{proposed|status=discussion}} = "The proposal is under discussion."
{{proposed|status=consensus}} = "The proposal is in the process of gathering consensus..."
{{proposed|status=whatever}} = "The proposal is whatever."
The following is a proposed Wikimedia document. References or links to this page should not describe it as supported, adopted, common, or effective.
The proposal is in development, it may still be very experimental, not working as currently described or intended, and could be possibly never finalized.
The following is a proposed Wikimedia document. References or links to this page should not describe it as supported, adopted, common, or effective.
The proposal is under discussion.
The following is a proposed Wikimedia document. References or links to this page should not describe it as supported, adopted, common, or effective.
The proposal is in the process of gathering consensus for adoption (which is not determined by counting votes) at its discussion page.
The following is a proposed Wikimedia document. References or links to this page should not describe it as supported, adopted, common, or effective.
The proposal currently has the following status: whatever.
The following is a proposed Wikimedia document. References or links to this page should not describe it as supported, adopted, common, or effective.
The proposal may still be in development, under discussion, or in the process of gathering consensus for adoption (which is not determined by counting votes).
Deep thoughts.
Categorization
{{proposed}} = Categorized under Category:Policy proposals
{{proposed|category=[[Category:Whatever]]}} = [[Category:Whatever]] is included in the page
{{proposed|category=whatever}} = whatever is included in the page
{{proposed|discussionpage=Page}} = Links to the page where the discussion is going on.