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.

On Metadata Interoperability in Data Warehouses

Abstract: In current data warehouse environments there is either no or only insufficient support for a consistent and comprehensive metadata management. Typically, a multitude of largely autonomous and heterogeneously organized repositories coexist. We categorize the major metadata types and their interdependencies within a three-dimensional classification approach. We then investigate how interoperability and integration of metadata can be achieved based on a federated metadata architecture and standardization efforts such as OIM and CWM. In particular, we examine synchronization alternatives to keep replicated metadata consistent. We also give an overview of currently available commercial repositories and discuss interoperability issues to couple data warehouses with information portals.

LOMster: Peer-to-peer Learning Object Metadata

Abstract: This paper reports on the development of a peer-to-peer based tool to share and reuse learning objects, by making it easy to publish and search over their metadata [4]. The goal of this work is to leverage the popularity of file sharing applications such as gnutella and napster in the context of learning content.

Automatic Extraction of Pedagogic Metadata from Learning Content

Abstract: Annotating learning material with metadata allows easy reusability by different learning/tutoring systems. Several metadata standards have been developed to represent learning objects and courses. A learning system needs to use pedagogic attributes including document type, topic, coverage of concepts, and for each concept the significance and the role. Moreover, in order to have a flexible and reusable repository of e-learning materials, it is necessary that the annotation of the documents with such metadata be done in an automatic fashion as far as possible. This paper describes the attributes that represent some important pedagogic characteristics of learning materials. To reduce the overhead of manual annotation we have explored the feasibility of automatic annotation of learning materials with metadata. This facilitates the creation of an elearning open repository for storing these annotated learning materials, which can be used by learning systems. The automatic annotation is based on a domain knowledge base and a number of algorithms like standard classification algorithms, parsing and analysis of documents have been used for this purpose. The results show a fair degree of accuracy, which may be improved in future using more sophisticated algorithms.

Systems and methods for using metadata to enhance data management operations

Abstract: Systems and methods for managing electronic data are disclosed. Various data management operations can be performed based on a metabase formed from metadata. Such metadata can be identified from an index of data interactions generated by a journaling module, and obtained from their associated data objects stored in one or more storage devices. In various embodiments, such processing of the index and storing of the metadata can facilitate, for example, enhanced data management operations, enhanced data identification operations, enhanced storage operations, data classification for organizing and storing the metadata, cataloging of metadata for the stored metadata, and/or user interfaces for managing data. In various embodiments, the metabase can be configured in different ways. For example, the metabase can be stored separately from the data objects so as to allow obtaining of information about the data objects without accessing the data objects or a data structure used by a file system.

Method and apparatus for the synchronization and storage of metadata

Abstract: Aspects of the invention described herein provide a method and apparatus for the synchronization of metadata across various metadata repositories. According to the invention, upon synchronization of a local metadata repository and at least one remote metadata repository, metadata values are stored in a local collection or mediator database. The mediator database facilitates conflict resolution across metadata repositories. The invention further provides a repository-specific metadata memory to enable the storage of repository-specific metadata histories to further enhance management and synchronization of the metadata.