What are the perceiving functions in Jungian personality type?

The functions of Sensing and Intuition are the preferences for perceiving. Jung defines Sensing as a step by step accumulation of data, whereas Intuition is an almost unconscious function of looking at the big picture. Sensers tend to see details clearly while Intuitives see patterns and tend to miss details. Because of that, Sensers are usually seen as practical and down to earth while Intuitives tend to be idealistic and theoretical. These preferences are measured on the S-N scale of the Myers_briggs type Indicator