Besides focusing on the meaning of a given discourse, the distinguishing characteristic of this approach is its stress on power relationships. These are expressed through language and behavior, and the relationship between language and power.   This form of analysis developed out of Foucault's genealogical work, where power was linked to the formation of discourse within specific historical periods. Some versions of this method stress the genealogical application of discourse analysis to illustrate how discourse is produced to govern social groups.  The method analyzes how the social world, expressed through language, is affected by various sources of power.  As such, this approach is close to social constructivism , as the researcher tries to understand how our society is being shaped (or constructed) by language, which in turn reflects existing power relationships.   The analysis attempts to understand how individuals view the world, and studies categorizations, personal and institutional relationships, ideology, and politics.