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A metadata registry is a central location in an organization where metadata definitions are stored and maintained in a controlled method. Metadata ( meta data, or sometimes metainformation) is "data about data" of any sort in any media

Contents

Use of Metadata Registries

Metadata registries are used whenever data must be used consistently within an organization or group of organizations. Examples of these situations include:

  1. Organizations that transmit data using structures such as XML, Web Services or EDI
  2. Organizations that need consistent definitions of data across time, between organizations or between processes, for example when an organization builds a data warehouse
  3. Organizations that are attempting to break down "silos" of information captured within applications or proprietary file formats

Central to the charter of any metadata management project is the process of creating trusting relationships with stakeholders and that definitions and structures have been reviewed and approved by appropriate parties. Don't change "Extensible" A Web service (also Web Service) is defined by the W3C as "a software system designed to support interoperable machine-to-machine interaction Electronic Data Interchange ( EDI) refers to the structured transmission of data between organizations by electronic means A data warehouse is a Repository of an organization's electronically stored data

Common characteristics of a metadata registry

A metadata registry typically has the following characteristics:

  1. It is a protected area where only approved individuals may make changes
  2. It stores data elements that include both semantics and representations
  3. The semantic areas of a metadata registry contain the meaning of a data element with precise definitions
  4. The representational areas of a metadata registry define how the data is represented in a specific format such as within a database or a structured file format such as XML

Clear separation of semantics and system-specific constraints

Because metadata registries are used to store both semantics (the meaning of a data element) and systems-specific constraints (for example the maximum length of a string) it is important to identify what systems impose these constraints and to document them. In Metadata, the term data element is an atomic unit of data that has An identification such as a Data element name A clear Data element definition Semantics is the study of meaning in communication The word derives from Greek σημαντικός ( semantikos) "significant" from A Representation term is a word or a combination of words used as part of a Data element name. Don't change "Extensible" For example the maximum length of a string should not change the meaning of a data element.

The International Organization for Standardization (ISO) has published standards for a metadata registry called ISO/IEC 11179 and also ISO15000-3 and ISO15000-4 ebXML registry and repository (regrep) EbXML RegRep

Metadata registry roles

A metadata registry is frequently set up and administered by an organization's data architect or data modeling team. ISO/IEC 11179 (formally known as the ISO/IEC 11179 Metadata Registry (MDR standard is the international standard for representing Metadata for an organization in ebXML RegRep is a standard under the E-Business XML umbrella which provides an integrated registry and repository A data architect is a person responsible for ensuring that the data assets of an organisation are supported by an architecture supporting the organization in achieving its strategic goals

Data elements are frequently assigned to data stewards or data stewardship teams that are responsible for the maintenance of individual data elements. In Metadata, a data steward' s role is assigned to a person that is responsible for maintaining a Data element in a Metadata registry.

Metadata element workflow

Metadata registries frequently have a formal data element submission, approval and publishing approval process. Each data element should be accepted by a data stewardship team and reviewed before data elements are published. After publication change control processes should be used.

Metadata navigation, search and publishing

Metadata registries are frequently large and complex structures and require navigation, visualization and searching tools. Use of hierarchical viewing tools are frequently an essential part of a metadata registry system. Metadata publishing consists of making data element definitions and structures available to both people and other computer systems. Metadata publishing is the process of making Metadata Data elements available to external users both people and machines using a formal review process and a commitment

Examples of public metadata registries

Metadata registry vendors / solutions

In alphabetical order:

See also

In alphabetical order:

References

Open Forums on Metadata Registries, in reverse chronological order:

Controlled vocabularies provide a way to organize knowledge for subsequent retrieval A data dictionary, as defined in the IBM Dictionary of Computing is a "centralized repository of information about data such as meaning relationships to other data origin In Metadata, the term data element is an atomic unit of data that has An identification such as a Data element name A clear Data element definition The term domain-specific language ( DSL) has become popular in recent years in Software development to indicate a Programming language or Specification Domain-specific modeling (DSM is a Software engineering methodology for designing and developing systems most often IT systems such as Computer software ebXML RegRep is a standard under the E-Business XML umbrella which provides an integrated registry and repository The Global Justice XML Data Model ( GJXDM or Global JXDM) is a Data reference model for the exchange of information within the justice and public safety ISO/IEC 11179 (formally known as the ISO/IEC 11179 Metadata Registry (MDR standard is the international standard for representing Metadata for an organization in Electronic Business using eXtensible Markup Language, commonly known as e-business XML, or ebXML (pronounced ee-bee-ex-em-el as it is typically referred to as is The Meta-Object Facility ( MOF) is an Object Management Group (OMG standard for Model-driven engineering. Metadata ( meta data, or sometimes metainformation) is "data about data" of any sort in any media Metadata publishing is the process of making Metadata Data elements available to external users both people and machines using a formal review process and a commitment This is the concept of metamodeling in Computer science and related disciplines Presentation Ubiquitous transformations The notion of Model transformation is of central importance to Information Technology. Model-based testing is Software testing in which Test cases are derived in whole or in part from a model that describes some (usually functional aspects Model-driven engineering (MDE is a software development methodology which focuses on creating models or abstractions of something more tangible that describe the elements of a system The National Information Exchange Model ( NIEM) is an XML -based information exchange framework from the United States. The Object Constraint Language is a Declarative language for describing rules that apply to UML models developed at IBM and now part of the UML standard An ontology in both Computer science and Information science is a formal representation of a set of concepts within a domain and the relationships between In the Model-driven architecture, QVT (Query/View/Transformation is a standard for Model transformation defined by the Object Management Group. The VIATRA (VIsual Automated model TRAnsformations framework is the core of a transformation-based verification and validation environment for improving the quality of systems designed The XML Metadata Interchange ( XMI) is an OMG standard for exchanging metadata information via Extensible Markup Language (XML.

Dictionary

metadata registry

-noun

  1. (metadata) A central location in an organization where metadata definitions are stored and maintained in a controlled method.
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