The term dependency is used to identify different values for the same [[parameter]] (or any other [[block]] for that matter).

Parameter values often have dependencies, such as dependency on atomic element (Iron, Methane, Oxygen), on media (concrete/clay/rock) or on location (Paris, Gothenburg, Kampala). 

The number of dependencies for a parameter determines its [[dimension]]. A parameter with one dependency is referred to as a vector parameter, two dependencies gives a matrix parameter. 

A type of dependency is defined using an [[index-list]], which is a named list of [[index|indices]]. 

====See also====

  * [[Dimension]]
  * [[Index-list]]
  * [[Index]]