Language workbenches usually produce infrastructure to represent models as abstract syntax trees (AST) and employ processing infrastructure largely based on visitors. The visitor pattern suffers from the expression problem regarding extensibility and reuse. Current approaches either forsake static type safety, require features unavailable in popular object-oriented languages (e.g., open classes...

Object-Oriented Action Semantics is a semantic framework for the definition of programming languages. The framework incorporates some object-oriented concepts to the Action Semantics formalism. Its main goal is to obtain more readable and reusable semantic specifications. ObjectOriented Action Semantics provides support for the definition of syntax-independent specifications, due to the way its...

This paper presents results from an analysis of a ‘visitor sector’ employment study for the Foothills Model Forest. A visitor sector is differentiated from the rest of the economy based on a survey of visitor-related and visitor-driven businesses. An analysis of the survey data is conducted by town (Hinton and Jasper) and by major visitor sector industry (restaurant/hotel, tour/transportation, ...

Protected area agencies are charged with the preservation, conservation and management of areas including wilderness, national parks and forests. These agencies are faced with increasing visitor numbers and decreasing budgets at a time where activities like tourism have to be managed alongside their traditional roles as natural resource managers. This paper reports on the outcomes of the first ...

The number of interactions with flower visitor species differs considerably among insect pollinated plants. Knowing the causes for this variation is central to the conservation of single species as well as whole plant /flower visitor communities. Species specific constraints on flower visitor numbers are seldom investigated at the community level. In this study we tested whether flower size par...

The objective of this study is to investigate an approach for dynamic construction of Electronic Roads. We envision Electronic Roads spanning a virtual multidimensional space, a distributed digital information repository, comprising primarily of video data of cultural heritage. A visitor (user) will be able to travel in this multidimensional space along different, semantically related historica...