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Astract: The original REA accounting model (McCarthy, 1982) has been extended in previous years into a business modeling language. Apart from its conceptual model, academic effort has been put into the definition of a formal description language, based on standards such as UML or OWL. The specification of a generic data model from a software engineering point of view for domain independent use of REA for business model specification and execution has been touched only briefly in the past. Thus, we present a data model concept for runtime-configurable REA business model definition and execution.

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Astract: Electronic Invoicing has attracted a lot of attention by being a cornerstone of the Digital Agenda for Europe, Europe´s 2020 Strategy. This agenda mandates a "think small first" principle in order to enable e-invoicing for companies of any size. The electronic invoice should be exchanged between the ERP systems of business partners. Traditional approaches based on electronic data interchange failed to attract SMEs. Due to the high costs, they only use e-invoicing if forced by their larger business partners. In this paper, we present an alternative approach that is based on native ERP integration of most common e-invoice scenarios. This approach was successfully implemented in a research project resulting in a university spin-off.

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Astract: Standardized business documents are a prerequisite for successful information exchange in electronic business transactions. The United Nations Centre for Trade Facilitation and eBusiness (UN/CEFACT) provides a conceptual modeling approach, called Core Components, used by Business Partners (BPs) for defining business document models (BDMs). BDMs are essential for defining service interfaces in service-oriented systems. However, in such a highly dynamic environment with ever-changing market demands, BPs are confronted with the need to revise their BDMs resulting in a multitude of different versions. BPs may dictate the use of new versions of BDMs, but small- and medium-sized enterprises (SMEs) may not always adopt new BDM versions due to the cost and effort involved, inhibiting automated electronic information exchange. In this article, we propose a framework including (i) a classification of the impact of changes in BDMs, (ii) evolution templates for the automated transformation of business documents between different BDM versions, and (iii) mitigation strategies for evolutions where fully-automated and semantic-preserving transformations are not feasible. Having such a framework at hand provides SMEs with a low-cost and light-weight approach for dealing with evolving market requirements and hence evolving business documents. Finally, we analyze the evolution of UN/CEFACT's Cross Industry Invoice which has been mandated to be used for electronic invoicing within the European Union as well as present a critical discussion of the evolution templates defined.

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Astract: The IEEE Conference on Business Informatics (CBI) constitutes the next step in the evolution of the IEEE Conference on e-Commerce and Enterprise Computing (CEC). The first event under this new banner takes place in Vienna, Austria, July 15 - 18, 2013. The change in the name and scope of the conference is congruent to the renaming of the IEEE Technical Committee on e-Commerce to the IEEE Technical Committee on Business Informatics and Systems (TCBIS). In summary, the program of CBI 2013 consists of nine key note presentations on the research domains, 15 academic paper sessions, three industry paper sessions, three workshops, a tutorial and a panel. We are looking forward to innovative research results and high quality contributions on a broad range of business informatics. This has been guaranteed by a very selective paper selection process. In total we received 103 submissions from 29 countries to the research tracks of the conference. Each submission received at least three review reports, whereby the reviews were based on five criteria: relevance to the subject of the conference track, originality, technical depth, potential impact on the community, and presentation. Out of the total amount of 103 submissions, the program committee selected 26 full papers in the research track. This results in an acceptance rate of 25% for full research papers. Furthermore, 16 short papers were accepted. In addition, these proceedings include 9 papers of the industry track, and 13 papers of the workshops.

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Astract: This book constitutes the refereed proceedings of the 14th International Conference on Electronic Commerce and Web Technologies (EC-Web) held in Prague, Czech Republic, in August 2013. In 2013, EC-Web focused on recommender systems, semantic e-business, business services and process management, and agent-based e-commerce. The 13 full and 6 short papers accepted for EC-Web, selected from 43 submissions, were carefully reviewed based on their originality, quality, relevance, and presentation.