Since there's a lot of confusion about SSDP and Social Democracy I'll leave two abstracts here.

Social Democracy

Social democracy is a political ideology that officially has as its goal the establishment of democratic socialism through reformist and gradualist methods.[1] Alternatively, social democracy is defined as a policy regime involving a universal welfare state and collective bargaining schemes within the framework of a capitalist economy. It is often used in this manner to refer to the social models and economic policies prominent in Western and Northern Europe during the later half of the 20th century.

http://en.wikipedia.org/wiki/Social_democracy

SSDP

The Social Democratic Party's position has a theoretical base within Marxist revisionism. Its party program interchangeably calls their ideology democratic socialism, or social democracy, though few high-level representatives have invoked socialism since Olof Palme. The party supports social welfare provision paid for from progressive taxation. The party supports a social corporatist economy involving the institutionalization of a social partnership system between capital and labor economic interest groups, with government oversight to resolve disputes between the two factions.[6] In recent times they have become strong supporters of feminism, equality of all kinds, and maintain a strong opposition to what they perceive as discrimination and racism.

http://en.wikipedia.org/wiki/Swedish_Social_Democratic_Party