10 results
Search Results
Now showing 1 - 10 of 10
- ItemThe ties that bind - On the impact of losing a consortium member in a cooperatively operated digital preservation system(2016) Lindlar, MichelleCooperatively operated digital preservation systems offer institutions of varying size the chance to actively participate in digital preservation. In current times of budget cuts they are also a valuable asset to larger memory institutions. While the benefits of cooperatively operated systems have been discussed before, the risks associated with a consortial solution have not been analyzed in detail. TIB hosts the Goportis Digital Archive which is used by two large national subject libraries as well as by TIB itself. As the host of this comparatively small preservation network, TIB has started to analyze the particular risk which losing a consortium member poses to the overall system operation. This paper presents the current status of this work-in-progress and highlights two areas: risk factors associated with cost and risk factors associated with the content. While the paper is strictly written from the viewpoint of the consortial leader/ host of this specific network, the underlying processes shall be beneficial to other cooperatively operated digital preservation systems.
- ItemA PDF Test-Set for Well-Formedness Validation in JHOVE - The Good, the Bad and the Ugly(Zenodo, 2017) Lindlar, Michelle; Tunnat, Yvonne; Wilson, CarlDigital preservation and active software stewardship are both cyclical processes. While digital preservation strategies have to be reevaluated regularly to ensure that they still meet technological and organizational requirements, software needs to be tested with every new release to ensure that it functions correctly. JHOVE is an open source format validation tool which plays a central role in many digital preservation workflows and the PDF module is one of its most important features. Unlike tools such as Adobe PreFlight or veraPDF which check against requirements at profile level, JHOVE’s PDF-module is the only tool that can validate the syntax and structure of PDF files. Despite JHOVE’s widespread and long-standing adoption, the underlying validation rules are not formally or thoroughly tested, leading to bugs going undetected for a long time. Furthermore, there is no ground-truth data set which can be used to understand and test PDF validation at the structural level. The authors present a corpus of light-weight files designed to test the validation criteria of JHOVE’s PDF module against “well-formedness”. We conclude by measuring the code coverage of the test corpus within JHOVE PDF validation and by feeding detected inconsistencies of the PDF-module back into the open source development process.
- ItemThe DURAARK project – Long-term preservation of architectural 3D-data(2014) Lindlar, Michelle; Saemann, Hedda[no abstract available]
- ItemD6.6.1 Current state of 3D object digital preservation and gap-analysis report ; DURAARK - Durable Architectural Knowledge ; FP7 - ICT - Digital Preservation(2014) Lindlar, Michelle; Saemann, Hedda; Ochmann, Sebastian; Gadiraju, Ujwal; Jonsson, OstenThis deliverable identifies gaps in existing processes for the digital preservation of 3D objects. The gap analysis is approached through an in-depth analysis of two areas. One area is that of fundamental digital preservation tools and processes regardless of their content type. It describes processes and standards adapted by the global digital preservation community and implemented in archives of varying domains, e.g., archives dealing predominantly with e-publications as well as AV-archives. The second area is that of current existing processes for the digital preservation of 3D objects. It describes aspects and challenges which are uniquely tied to the long-term archiving process of this content-type and lists existing tools and standards. The gaps are identified through a comparison of the content type agnostic and the 3D-specific state of the art descriptions
- ItemFunctional access to electronic media collections using emulation-as-a-service(2014) Bähr, Thomas; Lindlar, Michelle; Rechert, Klaus; Liebetraut, ThomasOver the last 30 years the German National Library of Science and Technology (TIB) accumulated a large collection of various electronic media, such as floppies or CD-ROMs. This poster describes both practical workflows as well as technical infrastructure to provide authentic and interactive access to the TIB’s large electronic media collection.
- ItemBuilding information modeling – A game changer for interoperability and a chance for digital preservation of architectural data?(2014) Lindlar, MichelleDigital data associated with the architectural design-andconstruction process is an essential resource alongside -and even past- the lifecycle of the construction object it describes. Despite this, digital architectural data remains to be largely neglected in digital preservation research – and vice versa, digital preservation is so far neglected in the design-and-construction process. In the last 5 years, Building Information Modeling (BIM) has seen a growing adoption in the architecture and construction domains, marking a large step towards much needed interoperability. The open standard IFC (Industry Foundation Classes) is one way in which data is exchanged in BIM processes. This paper presents a first digital preservation based look at BIM processes, highlighting the history and adoption of the methods as well as the open file format standard IFC (Industry Foundation Classes) as one way to store and preserve BIM data.
- ItemD8.4 Dissemination Master Plan and Publicity Material V2 ; DURAARK - Durable Architectural Knowledge ; FP7 - ICT - Digital Preservation(2014) Hecher, Martin; Beetz, Jakob; Ochmann, Sebastian; Lindlar, Michelle; Tamke, Martin; Edvardsen, Dag Fjeld; Dietze, Stefan; Jonsson, ÖstenThis deliverable (D8.4 Dissemination Master Plan and Publicity Material V2) is an update of D8.2. In order to keep it highly informative, those parts which have already been described in detail in D8.2 are presented in condensed form in this deliverable. The document covers the dissemination plan for the entire remaining period of the DURAARK project. Since this means a forecast for the next two years, not all plans can be presented in a detailed form, as for example dates and agendas for conferences during 2015 are in many cases not published yet. The DURAARK project covers many areas such as digital preservation, semantic enrichment and the comparison of as-planned and as-built state of architectural structures. The outcomes of each area have, so far, mainly been disseminated one by one through subject-specific channels. In the remaining project period these dissemination activities will be complemented by joint consortium activities, where all main outcomes of the project will be presented and discussed at joint events. Special attention has been put on DURAARK´s potential for contribution to standardization. Amongst other efforts this includes the envisaged extension of an IFC file format towards the IFC/A standard, which will provide vast possibilities of semantic enrichment as well as support for efficient 3D point cloud storage. Our assessment is furthermore that DURAARK can substantially contribute towards the development of standard procedures for the preservation of 3D architectural objects.
- ItemD3.3.2 Ontological Framework for a Semantic Digital Archive ; DURAARK - Durable Architectural Knowledge ; FP7 - ICT - Digital Preservation(2014) Beetz, Jakob; Lindlar, Michelle; Dietze, Stefan; Gadiraju, Ujwal; Edvardsen, Dag FieldIn this deliverable, a framework for a Semantic Digital Archive (SDA) for buildings and their components is suggested and described: The organizational framework for the Semantic Digital Archive as well as its methodological and technological enablers are outlined and specified. Conceptual approaches for the creation, maintenance and use of mappings between the building-specific Industry Foundation Classes (IFC) schematic and instance models with established datasets and vocabularies (e.g. the ones offered by the Linked Open Data cloud) are provided. It is shown how such mappings can be used to semantically enrich Building Information Model instances and how such enrichments can be preserved independently of the continuous evolvement of the referenced data sets. In order to track such changes in external data sets and reduce the amount of storage needed in the SDA, the concept of a Semantic Digital Observatory (SDO) is introduced and discussed. Using concrete data sets with a high relevance for the building industry, and in particular the reference vocabulary of then bSDD examples are provided that demonstrate the mechanisms introduced here. During future activities of the DURAARK project, the conceptual approaches introduced here are implemented in software prototypes as a proof of concept solution for the long-term preservation of semantically enriched Building Information Models.
- ItemD3.3.1 Metadata schema extension for archival systems ; DURAARK - Durable Architectural Knowledge ; FP7 - ICT - Digital Preservation(2014) Beetz, Jakob; Lindlar, Michelle; Dietze, Stefan; Gadiraju, Ujwal; Long, QinqinIn this report strategies are outlined how relevant metadata for the digital preservation of architectural data and related external vocabularies can be structured and stored. Related requirements are identified in WP7, further specified in WP2 and documented in the deliverables D 2.2.1, D.2.2.2, D.2.2.3 (Requirements documents) and D.7.7.1. Metadata for data identified relevant within the scope of the DURAARK project will be captured in OWL/RDF metadata schemas that re-use existing and recognized metadata standards and only extend them where deemed necessary. The proposed domain-specific metadata structures cover three main aspects: Descriptive metadata that stores domain-specific summaries and classification information of buildings as an intellectual entity type in a LTP system. Technical metadata that captures information about Building Information Models (BIM’s) and point cloud models which are the two main representation forms of buildings the DURAARK project focuses on. Linked Data metadata that captures information about the vocabularies and datasets that are used for the semantic enrichment of building models. These are stored separately alongside the individual building model Information Packages (IP) in the archive in a Semantic Digital Archive (SDA) for the storage and a Semantic Digital Observatory (SDO) for the processing of such volatile, evolving data. The use of this metadata from IFC models and inference methods are described in generic vendor-neutral terms and exemplified as an extension implementation to the existing archival system. The suggested reuse of existing schemas and vocabularies is illustrated in a number of use cases in section 4. In the appendices of this document complete listings of the respective vocabularies and schemas are provided. The results of this document have been created in collaboration with the work and deliverables in other work packages and specifically with work packages 2 and 7.
- ItemD2.2.3 System Architecture & Specification v2.0 ; DURAARK - Durable Architectural Knowledge ; FP7 - ICT - Digital Preservation(2014) Beetz, Jakob; Berndt, René; Dietze, Stefan; Edvardsen, Dag Fjeld; Gadiraju, Ujwal; Lindlar, Michelle; Ochmann, Sebastian; Tamke, Martin; Vock, RichardThis deliverable presents the second iteration on the system architecture of the DURAARK framework. It describes the philosophy, decisions, constraints, justifications, significant elements, and any other overarching aspects of the system that shape the design and implementation. It complements and refines the deliverable D2.2.2 System Architecture & Specification v1.0 from month 6.