Stockholm Municipality is an administrative unit defined by geographical borders. The semi-official name for the municipality is ''City of Stockholm'' (''Stockholms stad'' in Swedish). As a municipality, the City of Stockholm is subdivided into district councils, which carry responsibility for primary schools, social, leisure and cultural services within their respective areas. The municipality is usually described in terms of its three main parts: Innerstaden (Stockholm City Centre), Söderort (Southern Stockholm) and Västerort (Western Stockholm). The districts of these parts are: