== precision ==

The ''precision'' parameter specifies the required precision. If lower precision is requested, ADEI may:
 * approximate some values instead of processing whole data set from database
 * reuse the graphs generated before
 * use less data points for the graph

The following modes are supported:
 * ''DEFAULT'' - Default quality (quite high)
 * ''LOW'' - The quality is not important, the preview graph is generated
 * ''HIGH'' - The best possible quality
 * ''#number'' - Positive number defines number of pixels per data point (value of ''3'' means what approximately a single data point would be put for every 3 pixels)