Quick Response Code (QR Code) is a two-dimensional bar code that can store more information than traditional bar codes. Because they can carry information both vertically and horizontally, they can provide a vast amount of information including links, text or other data.

Query Tags are driven by a SQL query. The SQL syntax is dictated by the database used, not any special Ignition format.

See QR Code.

A commonly used object in Ignition that incorporates the value of a tag or property, in addition to some meta data associated with the value. Composed of three parts: a value, a quality code of the value, and timestamp the value was taken

An representation of a distinct quality value - defined by a level (Good, Bad, Uncertain, Error) and a unique code. Has methods like isGood(), isBad(), and isError() available to drive logic.