Metadata repository

About: Metadata repository is a research topic. Over the lifetime, 5841 publications have been published within this topic receiving 121778 citations.

Data sharing and retrieval using OAI-PMH

Abstract: There is a growing consensus for the need to store and archive digital data, particularly for publicly funded research. Long-term preservation of that data generally requires some form of institutional archive, such as those directed to particular scientific communities of practice. Given that data is often of use to multiple communities of practice, which may have differing norms for data and metadata structure and semantics, effective standards for data and metadata exchange are important factors for users to be able to find and retrieve data. Toolsets that provide a coherent presentation of information across multiple standards are important for data search and access. One such toolset, Mercury, is a open-source metadata harvesting, data discovery, and access system, built for researchers to search for, share and obtain spatiotemporal data used across a range of climate and ecological sciences. Mercury is used across multiple projects to provide a coherent search interface for spatiotemporal data described in any of several metadata formats. Mercury has recently been extended to enable harvesting and distribution of metadata using the Open Archive Initiative Protocol for Metadata Handling (OAI-PMH). In this paper we describe Mercury’s capabilities with multiple metadata formats, in general, and, more specifically, the results of our OAI-PMH implementations and the lessons learned.

Historical data management

Abstract: An apparatus and method for managing historical data includes receiving a compiled application program and a declarative specification. An enhancer generates one or more representations of at least one data class defined in the application program based on at least one historical metatag and historical metadata associated therewith from the declarative specification. The enhancer also generates configuring instructions for configuring a database in accordance with the storage representation(s), an enhanced compiled application program including instructions for accessing data in the configured database, and a historical updater program for updating the data in the database based on the historical metadata. Once the database is configured in accordance with the configuring instructions and data is stored in accordance with the storage representation(s), the enhanced compiled application program is executed to access the database so as to retrieve historical data therefrom and the historical updater program is executed to update the data in the database based on the historical metadata.

Open metadata formats: efficient XML-based communication for high performance computing

Abstract: High-performance computing faces considerable change as the Internet and the Grid mature. Applications that once were tightly-coupled and monolithic are now decentralized, with collaborating components spread across diverse computational elements. Such distributed systems most commonly communicate through the exchange of structured data. Definition and translation of metadata is incorporated in all systems that exchange structured data. We observe that the manipulation of this metadata can be decomposed into three separate steps: discovery, binding of program objects to the metadata, and marshaling of data to and from wire formats. We have designed a method of representing message formats in XML, using datatypes available in the XML Schema specification. We have implemented a tool, XMIT that uses such metadata and exploits this decomposition in order to provide flexible run-time metadata definition facilities for an efficient binary communication mechanism. We also demonstrate that the use of XMIT makes possible such flexibility at little performance cost.

What terms does your metadata use? Application profiles as machine-understandable narratives

Abstract: The SCHEMAS Registry aims at providing a selected and annotated overview of metadata vocabularies and their use in application environments Based on harvested metadata in RDF (Resource Description Framework), the registry allows users to explore links between "namespace schemas", which declare standard definitions of metadata terms, and "application profiles" RDF statements about the use or adaptation of namespace terms for particular domains, services, or projects Where instance metadata does not follow standard namespaces or explicit data models, this style allows implementors to assert an explicit mapping to standard terms Registering profiles can help harmonize metadata usage in particular domains and, in the longer term, could provide a machine-processable basis for automating crosswalks and conversions

Method and system for managing data objects

Abstract: A system and method for managing a plurality of data objects with a database complying with the Dublin Core metadata schema. The database includes a plurality of tables including at least one metadata table containing metadata records conforming to the Dublin Core metadata schema and relating to data objects stored in one of the tables. In another embodiment, an electronic scientific laboratory notebook for managing a plurality of scientific laboratory notebook data objects including a computing device communicating with a system for managing the plurality of scientific laboratory notebook data objects. Data objects may be entered, searched and viewed through the electronic notebook. In another embodiment, a computer-readable medium containing a data structure for managing a plurality of data objects with a plurality of tables complying with the Dublin Core metadata schema. The data structure may include a modified relational database incorporating hierarchical structure between tables.