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2.2.13.3 Subtopic Sequences

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All volatile dependency information relating to cells that contain calls to an RTD or cube function that share the same set of parameter values is specified by a collection of records specified by BrtBeginVolTopic (section 2.4.298) and BrtEndVolTopic (section 2.4.647) records, as defined in the Volatile Dependencies (section 2.1.7.60) part.

A volatile dependency collection specifies the following:

  • The sequence of subtopics which define the dependency, corresponding to a call’s parameter values. This is specified by the sequence of BrtVolSubtopic (section 2.4.851) records.

  • The last value returned by the call that corresponds to the volatile dependency.

  • The set of cells which depend upon the data specified by this volatile dependency, and need to be updated whenever the value cached for this dependency changes. This is specified by the set of BrtVolRef (section 2.4.849) records.