Common ownership refers to holding the assets of an organization, enterprise or community indivisibly rather than in the names of the individual members or groups of members as common property. Forms of common ownership exist in every economic system. Common ownership of the means of production is a central goal of communist political movements as it is seen as a necessary democratic mechanism for the creation and continued function of a communist society. Advocates make a distinction between collective ownership and common property as the former refers to property owned jointly by agreement of a set of colleagues, such as producer cooperatives, whereas the latter refers to assets that are completely open for access, such as a public park freely available to everyone.