Examples of this are the People's Republic of China under the United Front, the National Front in former East Germany and the Democratic Front for the Reunification of Korea in North Korea.
Description of a party platform?
A political party platform or program is a formal set of principal goals which are supported by a political party or individual candidate, in order to appeal to the general public, for the ultimate purpose of garnering the general public's support and votes about complicated topics or issues.
I hope this helps.