Data nodes can depend on one another in a parent-to-child relationship or as referenced nodes. A dependent data node can have one of three recalculation modalities in order to recalculate when a parent or a referenced node is changed: Automatic, manual, and fixed.
Independently of its recalculation modality, the recalculation of a data node can be triggered by an Events in TIS Board.
Automatic
This is the default. When set to automatic recalculation, an out-of-date data node and all its out-of-date ancestors are recalculated when the data node is opened.
A data node set to automatic can also be recalculated manually when the recalculate symbol (
) is clicked, see Recalculate Data Node.
When set to automatic, no flag appears in the list of data nodes.
Manual
When set to manual recalculation, an out-of-date data node and all its out-of-date ancestors are recalculated when the recalculate symbol () is clicked, see Recalculate Data Node.
When set to manual, the 
flag appears in the list of data nodes.
Fixed
When set to fixed, a data node cannot be recalculated. The 
flag appears in the list of data nodes.
