Proceedings of the International Conference on Dublin Core and Metadata Applications (DCMI)
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Describing Services for a Metadata-driven Portal
No full textThis paper describes New Zealand E-government activities supporting the discovery of services through the use of Dublin Core-based New Zealand Government Locator Service (NZGLS) metadata. It notes the issues faced in collecting service metadata from agencies to populate a new whole-of-government portal. The paper then considers the adequacy of the metadata schema for service description, and identifies a difficulty in applying definitions which refer to the content of the resource to a process-like resource such as a service. Three approaches to this challenge are suggested: creating a surrogate description to provide a source of content; treating the information exchanged in conducting the service as the content; and using additional contextual metadata. The adequacy of the schema for covering all the users' needs for discovering and using a service is examined, and the need for metadata about specific service delivery points and conditions is noted. Finally, it is observed that future stages of e-government will require more sophisticated descriptions of services to support processes beyond discovery
Integrating Schema-specific Native XML Repositories into a RDF-based E-Learning P2P Network
No full textAs its name implies, a native XML repository supports storage and management of XML in the original hierarchical form rather than in some other representations. In this paper we present our approach for integrating native XML repositories into Edutella, a RDF-based E-learning P2P network, through mapping native XML database schemas onto the Edutella Common Data Model (ECDM) and further translating ECDM's internal query language Datalog into XPath, the local query language of native XML repositories. Due to the considerable incomparability between the ECDM and the XML data model, a generic integration approach for schema-agnostic native XML repositories is found to be unrealistic. Thus our investigations are focused on three schemaspecific native XML repositories respectively based on the DCMES, LOM/IMS, and SCORM XML binding data schema. Since these three metadata sets are the most popularly applied learning resource metadata specifications in E-Learning, our integration approach satisfactorily addresses the current usage of Edutella in E-Learning despite that a generic integration approach for schema-agnostic native XML repositories has not been implemented
Metadata hiding tightly binding information to content
No full textIn this poster an application for embedding, inside a digital image, metadata for identifying its IPR status is presented; this insertion has been achieved by means of a digital watermarking technique. This technology has been developed within the IST 21031 Tradex European Project. The metadata have been constructed according to the indications contained in the JPEG standar
Building Educational Metadata Application Profiles
No full textMetadata schemas relevant to online education and training have recently achieved the milestone of formal standardization. Efforts are currently underway to bring these abstract models and theoretical constructs to concrete realization in the context of communities of practice. One of the primary challenges faced by these efforts has been to balance or reconcile local requirements with those presented by domain-specific and cross-domain interoperability. This paper describes these and other issues associated with the development and implementation of metadata application profiles. In particular, it provides an overview of metadata implementations for managing and distributing Learning Objects and the practical issues that have emerged so far in this domain. The discussion is informed by examples from two national education and training communities – Australia and Canada
Why is Accessibility Metadata Proving Difficult?
No full textAccessibility metadata is simply metadata that describes the accessibility of resources and services, usually those on, or available through, the web. Awareness of widespread web content inaccessibility led to work being done to develop guidelines for
authors and others to make sure that content would be more accessible to those with special access needs, especially those with disabilities who were being disenfranchised by their lack of access to the web. Currently, work is being done to find ways of signalling the degree of accessibility of resources, and ways of matching resources to searches and people. In addition, accessibility metadata could be used to repair some inaccessibility problems on the fly. This paper describes some of the work being done and the problems that have contributed to make the progress comparatively slow
The Virtual Image in Streaming Video Indexing
Get PDFMultimedia technology has been applied to many types of applications and the great amount of multimedia data need to be indexed. Especially the usage of digital video data is very popular today. In particular video browsing is a necessary activity in many kinds of knowledge. For effective and interactive exploration of large digital video archives there is a need to index the videos using their visual, audio and textual data. In this paper, we focus on the visual and textual content of video for indexing. In the former approach we use the Virtual Image and in the latter one we use the Dublin Core Metadata, opportunely extended and multilayered for the video browsing and indexing. Before to concentrate our attemption on the visual content we will explain main methods to video segmentation and annotation, in order to introduce the steps for video keyfeature extraction and video description generation
Visual Representation and Contextualization of Search Results – List and Matrix Browser
No full textWe present a new approach for the representation of search results in a graphical user interface that allows navigating and exploring these results. An interactive matrix display is used for showing the hyperlinks of a site search or other search queries in different hierarchical category systems. The results of a site search are not only shown as a list, but also classified in an ontology-based category system. So the user has the possibility to explore and navigate within the results of hisquery. The system offers a flexible way to refine the query by drilling down in the hierarchical structured categories. The user can explore the results in one category with the so called List Browser or in two categories at the same time with the so called Matrix Browser (Ziegler et al. 2002). A familiar and well known interactive tree widget is used for the presentation of the categories and located hyperlinks, so the handling of the system is very intuitive
Policy Control Network Architecture using Metadata
No full textQuality of service (QoS) technology has been implemented to be applied to new applications on the next-generation Internet. However, as new applications such as P2P and stream application have many kinds of features and requirements, some additional features should be added to current QoS control technology. Policy definition for transport layer in a domain and among domains is being discussed at IETF to set a standard process, however detailed policy corresponding to the application or contents information according to the application semantics has not been discussed. Therefore we developed QoS policy control mechanism using metadata which is defined as a structured data according to the application semantics. Though metadata and transport mechanism can be located into quite different positions in the concept of network layers, we made them successfully collaborated by defining meta policy. In this paper, we describe our system architecture to define a meta policy based on the requirements and information contents from the application as a high level layer concept to be able to classify the network behavior. Our approach enables to multiple QoS control and collaboration among domains
The MEG Registry and SCART: Complementary Tools for Creation, Discovery and Re-use of Metadata Schemas
No full textSCART is an RDF schema creation tool designed for use by implementers working within digital library and learning environments. This schema creation and registration tool is being developed to work in conjunction with registry software. SCART will provide implementers with a simple tool to declare their schemas, including local usage and adaptations, in a machine understandable way based on the RDF Schema specification. This tool is optimised for use by the Metadata for Education Group, projects and services within the UK providing resource discovery in the domain of education. By providing a complementary creation tool and registry the aim is to facilitate easy discovery of existing schemas already registered in a schemas registry, and to enable implementers to re-use these existing schemas where appropriate
Using Web Services to Interoperate Data at the FAO
No full textIn this paper we present our experience of using Web services to support interoperability of data sources at the Food and Agriculture Organization of the United Nations. We describe the information bus architecture based on Web services to assist with multilingual access of data stored in various data sources and dynamic report generation. The architecture preserves the autonomy of the participating data sources and allows evolution of the system by adding and removing data sources. In addition, due to the characteristics of Web services of hiding implementation details of the services, and therefore, being able to be used independently of the hardware or software platform in which it is implemented, the proposed architecture supports the problem of existing different technologies widespread in the FAO, and alleviates the difficulty of imposing a single technology throughout the organization. We discuss the benefits and drawbacks of our approach and the experience gained during the development of our architecture