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In a network, a grey dashed line between nodes is a Reference (or Link) that indicates one operator is getting data from another operator.

A Reference is formed by either

  • a Parameter Reference, a parameter in an OP that is a name or path to another operator, or
  • a Node Reference, an expression that contains the name or path of another operator. The expression can appear in a parameter, or in a DAT's python script.
  • a DAT Cell Reference
  • a CHOP Channel Reference

When a reference is in an expression, like op('base1/pattern1').par.phase, it specifies the location to retrieve a value from.

When a reference is a parameter in an OP, such as /project1/pattern1, the data output from the source OP is passed to, or shared with the OP containing the reference. For example, if it's a reference to a TOP, the source image is used to generate the output of the OP.

In some cases a parameter that is an OP reference is actually a reference to multiple OPs - the path to lultiple OPs is obtained by listing their paths or using wildcards to specify multiple OPs. See Pattern Matching.

Examples of operators that have reference parameters:

See also: Wire, Hierarchy