Meta Data Services

About: Meta Data Services is a research topic. Over the lifetime, 2564 publications have been published within this topic receiving 40102 citations.

Metadata driven adaptation in the ADMITS project

Abstract: The ADMITS project (Adaptation in Distributed Multimedia IT Systems) is building an experimental distributed multimedia system for investigations into adaptation, which we consider an increasingly important tool for multimedia systems. A number of possible adaptation entities (server, proxy, clients, routers) are being explored, different algorithms for media, component and application-level adaptations are being implemented and evaluated, and experimental data are being derived to gain insight into when, where and how to adapt, and how individual, distributed adaptation steps interoperate and interact with each other. In this paper the “adaptation-chain” of (MPEG-conforming) metadata based adaptation is described: from the creation stage at the server side, through its usage in the network (actually in a proxy), up to the consumption at the client. The metadata are used to steer the adaptation processes. MPEG-conformant metadata, the so-called variation descriptions, are introduced; an example of a complete MPEG-7 document describing temporal scaling of an MPEG-4 video is given. The meta-database designed to store the metadata is briefly discussed. We describe how the metadata can be extracted from MPEG-4 visual elementary streams and initial results from a temporal video scaling experiment are given. We further present how the metadata can be utilized by enhanced cache replacement algorithms in a proxy server in order to realize quality-based caching; experimental results using these algorithms are also given. Finally, an adaptive query and presentation interface to the meta- and media database is outlined.

Dealing with metadata quality: The legacy of digital library efforts

Abstract: In this work, we elaborate on the meaning of metadata quality by surveying efforts and experiences matured in the digital library domain. In particular, an overview of the frameworks developed to characterize such a multi-faceted concept is presented. Moreover, the most common quality-related problems affecting metadata both during the creation and the aggregation phase are discussed together with the approaches, technologies and tools developed to mitigate them. This survey on digital library developments is expected to contribute to the ongoing discussion on data and metadata quality occurring in the emerging yet more general framework of data infrastructures.

Managing heterogeneous ecological data using Morpho

Abstract: Ecological and environmental data cover a wide range of topics, from biodiversity surveys to measurements of trace gas fluxes, and are modeled using a tremendous variety of schemas We have developed Morpho, a data management application designed to assist researchers in managing this heterogeneous collection of ecological data Our goal in developing Morpho was to ease the burden of data management on scientists while improving access to and documentation for ecological data Morpho allows ecological researchers to describe their data using a comprehensive and flexible metadata specification, and to share their data publicly or to specific collaborators over the Knowledge Network for Biocomplexity (KNB) Morpho's main features include: (1) flexible metadata creation and editing using an XML syntax for metadata exchange; (2) a 'wizard' interface for collecting metadata; (3) automated metadata extraction while importing data; (4) an XML editor that is configurable using multiple XML DTDs; (5) compliance with the Ecological Metadata Language; (6) powerful metadata search on the network or locally; and, (7) comprehensive revision control for data and metadata

Clipboard content and document metadata collection

Abstract: Provided is a system and method for the collection and storing of information relating to a document captured in a copy-and-paste operation of a word processing application, spreadsheet, presentation processing software or other application that provides copy-and-paste functionality. A clipboard interface collects and stores information, or “metadata,” relating to a selected document or portion of a document. Once the metadata collection system gathers information corresponding to particular captured content, the system stores the information as metadata so that the user or a subsequent user of the destination document can, when necessary, access the metadata associated with the source document. Metadata is stored either within the destination document or in another document that can be correlated with the destination document.

Specifying metadata standards for metadata tool configuration

Abstract: A critical problem for metadata applications is flexibility. A metadata application must be sufficiently flexible to cope with changes to metadata standards over time and to allow users to extend a standard to cope with local requirements. A key component of supporting flexible metadata applications is software whcih can be dynamically configured by a specification of the metadata standard. By contrast, in current metadata software the metadata standard is embedded in the code, making changes relatively more difficult and expensive. Configurable software also leads to better tools at a lower cost, as it is not necessary to re-implement functionality for every new metadata standard. This paper describes a metadata specification designed to support dynamic configuration of metadata software by capturing features of metadata standards. The specification comprises three components: the classification of the metadata standard, the metadata schema, and the metadata expression.