Version Control in Online Software Repositories

Software version control repositories provide a uniform and stable interface to manage documents and their version histories. Unfortunately, Open Source systems, for example, CVS, Subversion, and GNU Arch are not well suited to highly collaborative environments and fail to track semantic changes in repositories. We introduce document provenance as our Description Logic framework to track the semantic changes in software repositories and draw interesting results about their historic behaviour using a rule-based inference engine. To support the use of this framework, we have developed our own online collaborative tool, leveraging the fluency of the modern WikiWikiWeb

Version Control in Online Software Repositories

Software version control repositories provide a uniform and stable interface to manage documents and their version histories. Unfortunately, Open Source systems, for example, CVS, Subversion, and GNU Arch are not well suited to highly collaborative environments and fail to track semantic changes in repositories. We introduce document provenance as our Description Logic framework to track the semantic changes in software repositories and draw interesting results about their historic behaviour using a rule-based inference engine. To support the use of this framework, we have developed our own online collaborative tool, leveraging the fluency of the modern WikiWikiWeb

Hypermedia Learning Objects System - On the Way to a Semantic Educational Web

While eLearning systems become more and more popular in daily education, available applications lack opportunities to structure, annotate and manage their contents in a high-level fashion. General efforts to improve these deficits are taken by initiatives to define rich meta data sets and a semanticWeb layer. In the present paper we introduce Hylos, an online learning system. Hylos is based on a cellular eLearning Object (ELO) information model encapsulating meta data conforming to the LOM standard. Content management is provisioned on this semantic meta data level and allows for variable, dynamically adaptable access structures. Context aware multifunctional links permit a systematic navigation depending on the learners and didactic needs, thereby exploring the capabilities of the semantic web. Hylos is built upon the more general Multimedia Information Repository (MIR) and the MIR adaptive context linking environment (MIRaCLE), its linking extension. MIR is an open system supporting the standards XML, Corba and JNDI. Hylos benefits from manageable information structures, sophisticated access logic and high-level authoring tools like the ELO editor responsible for the semi-manual creation of meta data and WYSIWYG like content editing.Comment: 11 pages, 7 figure

Open Access zwischen Revolution und Goldesel. Eine Bilanz fünfzehn Jahre nach der Erklärung der Budapest Open Access Initiative

Open Access war anfangs der 2000er Jahre von Umbruchstimmung, Euphorie und Idealismus getragen. Die Erwartungen waren klar umrissen: Wissenschaftlern war an rascher Verbreitung wissenschaftlicher Texte gelegen, Bibliothekaren an einer Abhilfe für stark steigende Journalpreise, den Wissenschaftseinrichtungen an effizienter und freier Verbreitung ihrer Inhalte. Einzig die Position der kommerziellen Wissenschaftsverlage zu Open Access war überwiegend zögerlich bis ablehnend. 15 Jahre nach dem Treffen der Budapest Open Access Initiative muss 2016 festgehalten werden, dass die erhoffte Revolution wohl ausbleiben wird. Vielmehr scheint Open Access heute weitgehend von den vormals in Szenarien kaum erwähnten kommerziellen Verlagen angetrieben. Zwar findet sich auch Open Access in wissenschaftlicher Selbstverwaltung, dennoch bleiben die Akteure im wissenschaftlichen Publizieren bislang die gleichen wie 2001 und die schon damals bekannten Konzentrationseffekte am Publikationsmarkt setzen sich fort. In the early 2000s Open Access spread a mood of upheaval, euphoria, and idealism. The expectations were obvious: scientists wanted to share their own articles immediately with other scientist, librarians needed a remedy for exploding journal prices, the scientific institutions wanted funded research to be efficiently and freely disseminated. Only the position of the commercial publishers to Open Access was predominantly hesitant or even disapproving. 2016 - 15 years after the Budapest Open Access Initiative meeting - it must be noted that the hopes for a revolution will be disappointed. On the contrary, today Open Access seems to be largely driven by the commercial publishers, which were barely mentioned in the early Open Access scenarios. Although there non-commercial Open Access in scientific self-administration exists, today the actors in scientific publishing are still the same as in 2001, and the already known concentration effects on the publishing market continue

Implementation of Turing machines with the Scufl data-flow language

International audienceIn this paper, the expressiveness of the simple Scufl data-flow language is studied by showing how it can be used to implement Turing machines. To do that, several non trivial Scufl patterns such as self-looping or sub-workflows are required and we precisely explicit them. The main result of this work is to show how a complex workflow can be implemented using a very simple data-flow language. Beyond that, it shows that Scufl is a Turing complete language, given some restrictions that we discuss

The Meta-data-Database of a Next Generation Sustainability Web-Platform for Language Resources

Our goal is to provide a web-based platform for the long-term preservation and distribution of a heterogeneous collection of linguistic resources. We discuss the corpus preprocessing and normalisation phase that results in sets of multi-rooted trees. At the same time we transform the original metadata records, just like the corpora annotated using different annotation approaches and exhibiting different levels of granularity, into the all-encompassing and highly flexible format eTEI for which we present editing and parsing tools. We also discuss the architecture of the sustainability platform. Its primary components are an XML database that contains corpus and metadata files and an SQL database that contains user accounts and access control lists. A staging area, whose structure, contents, and consistency can be checked using tools, is used to make sure that new resources about to be imported into the platform have the correct structure

From a Link Semantic to Semantic Links - Building Context in Educational Hypermedia

Modularization and granulation are key concepts in educational content management, whereas teaching, learning and understanding require a discourse within thematic contexts. Even though hyperlinks and semantically typed references provide the context building blocks of hypermedia systems, elaborate concepts to derive, manage and propagate such relations between content objects are not around at present. Based on Semantic Web standards, this paper makes several contributions to content enrichment. Work starts from harvesting multimedia annotations in class-room recordings, and proceeds to deriving a dense educational semantic net between eLearning Objects decorated with extended LOM relations. Special focus is drawn on the processing of recorded speech and on an Ontological Evaluation Layer that autonomously derives meaningful inter-object relations. Further on, a semantic representation of hyperlinks is developed and elaborated to the concept of semantic link contexts, an approach to manage a coherent rhetoric of linking. These solutions have been implemented in the Hypermedia Learning Objects System (hylOs), our eLearning content management system. hylOs is built upon the more general Media Information Repository (MIR) and the MIR adaptive context linking environment (MIRaCLE), its linking extension. MIR is an open system supporting the standards XML and JNDI. hylOs benefits from configurable information structures, sophisticated access logic and high-level authoring tools like the WYSIWYG XML editor and its Instructional Designer.Comment: Summary of several conference article