The MULTI Warehouse Challenge

The “MULTI” workshop series has set a number of multi-level modeling challenges, each designed to allow competing multi-level modeling approaches to demonstrate their capabilities and/or to tease out their limitations. The challenges therefore have been serving a three-fold purpose: First, they have allowed technologies to demonstrate their abilities. Second, they have pointed out where technologies still fall short of providing optimal modeling support. Third, they have provided a basis for comparing competing technologies, often revealing the trade-offs implied by certain design choices. The MULTI Warehouse Challenge described in this paper is the fourth installment in this series, defining a new unique set of demanding modeling challenges.

1. Introduction

Multi-level modeling addresses the modeling of sub-ject domains that benefit from an explicit recognition of multiple levels of domain representation, i.e., domains such as software development, process modeling, organizational roles, biological taxonomies, product hierarchies, etc. Over the span of two decades many approaches for multi -level modeling have been proposed, all sharing the goal of ex-tending traditional two-level approaches with constructs and concepts that naturally support multiple levels of domain representation, with the goal to increase the expressiveness of models while simultaneously reducing their complexity.