Expression Search Example 2: scenario hierarchy with multiple inheritance

The document describes how the LEAP software resolves variable expressions in a scenario hierarchy involving multiple inheritance. Using a 'Mitigation' scenario as an example—which inherits from 'industry', 'buildings', and 'transport' scenarios—it outlines a four-step search sequence: first checking the active scenario, then the additional inherited scenarios in order, then walking up the main scenario tree to the 'Baseline' and 'Current Accounts' scenarios, and finally reverting to a default value.

• In a scenario hierarchy with multiple inheritance, LEAP follows a specific sequential search order to find a variable expression: it starts with the active scenario, moves to additional scenarios listed in the 'First Inherits From' box, walks up the main scenario tree, and ends with the default value.
• For the specific example provided, the full expression search order is: Mitigation, Industry, Buildings, Transport, Baseline, Current Accounts, Default Value.

APA

Stockholm Environment Institute (n.d.). Expression Search Example 2: scenario hierarchy with multiple inheritance. https://leap.sei.org/help24/Concepts/Expression_Search_Examples/Copy_of_Expression_Search_Example_Two.htm

Chicago

Stockholm Environment Institute. Expression Search Example 2: scenario hierarchy with multiple inheritance. n.d. https://leap.sei.org/help24/Concepts/Expression_Search_Examples/Copy_of_Expression_Search_Example_Two.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Expression Search Example 2: scenario hierarchy with multiple inheritance |url=https://leap.sei.org/help24/Concepts/Expression_Search_Examples/Copy_of_Expression_Search_Example_Two.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendexpression, author = {{Stockholm Environment Institute}}, title = {{Expression Search Example 2: scenario hierarchy with multiple inheritance}}, institution = {Stockholm Environment Institute}, url = {https://leap.sei.org/help24/Concepts/Expression_Search_Examples/Copy_of_Expression_Search_Example_Two.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }