The Vineyard Movement is an expression of Pentecostal Christianity in the evangelical Protestant tradition. It is known by many Christians today, in part, through the well-known worship songs that are sung in a variety of different churches.
The Vineyard Church didn't originally have an official "statement of beliefs" (SOF) like other denominations did (e.g. the Assemblies of God) or an official creed. This doesn't mean, however, that beliefs and doctrine are unimportant to the church or its members. Throughout their history, Vineyard churches have been evangelical in belief and practice.
Those who were involved in establishing Vineyard churches believed that doctrine kept people from coming to church and feeling a sense of a belonging at church, and so sought to place theological dogma in the background, instead of the foreground, of the ministry of Vineyard churches. Over time, however, many in the Vineyard body thought it would be wise to clarify and articulate what Vineyard churches believe in order to find unity among like-minded Christians and also to shield themselves from false teachings, so quite an extensive SOF and list of Values was developed for public view.