Metadata Registration System

This article is excerpted from "key project research achievements of the Science and Technology Basic Condition platform of the Ministry of Science and Technology-Research on the open registration system of metadata standards and norms" by Liang Na and Zhang Xiaolin ".

As a public, open, reliable and sustainable mechanism, the metadata registration system supports standardized publishing and retrieval of metadata-defined information, which is of great significance for Open Digital Information Service mechanisms in complex environments.

I. Basic Categories of the metadata registration system:

(1) Single Name Domain (Namespace)MrManages the metadata of a naming domain,For example, DCMI

Registry http://dublincore.org/groups/registry/fun_req_ph1-20011031.shtml

Roads registry http://www.ukoln.ac.uk/metadata/roads/templates/, etc.

(2) Metadata registration system across naming Domains

Manage the metadata formats of multiple named domains across named domain Mr, such as German metadata registry http://www.mpib-berlin.mpg.de/en/institut/dok/metadata/gmr/Gmr1e.htm

Desire metadata registry (DMR) http://desire.ukoln.ac.uk/registry/

Schemas Registry (SR) http://www.schemas-forum.org/registry/

GMR registers and manages metadata formats in fields such as education, medicine, physics, and mathematics, DMR registers the elements, Content Encoding System, application protocol, and conversion of multiple naming domains, such as acore, bibilink, DC, IEEE Lom, IMs, NC-UK, roads, vCard, and VTC. templates, the SR registers metadata of the named domains such as agls, DC, DC-Gov, DC-lib, RQs, etb, Eun, FAO, IEEE Lom, and CLD in the DMR mode.

Cross-naming domain Mr describes and manages the metadata specifications of different naming domains according to the unified data model. In particular, it describes and manages the possible associations in different specifications, this allows you to analyze and compare the expressions of the same logical object or logical relationship in different metadata formats. Cross-naming domain Mr does not maintain the authority of data elements in a naming domain, because such authority already exists, instead, it supports metadata identification, reuse, and ing conversion operations by defining metadata formats, element semantics, and application rules for various naming domains and languages.

(3) Distributed metadata Registration System

Ii. basic functions of the metadata registration system:

(1) registration. Mr supports manual registration and automatic registration.

(2) Data Management

(3) Search and release. Mr publishing is often implemented by a Web server and supports multiple searches, especially Association-based searches. Mr should also support browsing and display relevant information based on the naming domain and standard type.

(4) Support for metadata parsing and conversion. Mr supports layer-by-layer parsing of metadata definition information by means of registered metadata specifications and metadata content Association.

(5) self-description. Mr itself is a Web service, which can be opened in a standard form (such as WSDL). The description information is registered in the distributed service registration system, for third-party systems to query and call.

 

Many organizations use this standard 11179 as the standard for their data element registration systems, such as the environmental data registration system in the United States, the Health Information Library, and the meta database of census groups [38.

Iii. Example System for manual registration and Retrieval

1,Roads metadata registry

Roads (resource organization and discovery in subject-based services, resource organization and discovery in the theme Service System) project, we are committed to developing topic gateway software packages, researching cross-Gateway retrieval and interoperability methods, and developing and constructing resource directories for specific topic fields. The roads system has established a series of theme gateways, such as Adam, Biz/ED, eels, finish VL project, history, novagate, omni, and sosig.

2,Desire metadata registry

The desire metadata Registration System (DMR) is a specific implementation of ukoln supported by JISC in the UK and provides definition information about metadata formats across naming domains. It registers 22 namespace, 35 Registration Authority, 16 Basic Semantic Units (semantic units), and 517 metadata elements (elements) 14 representation classes, 106 schemes, 17 application profiles, and 19 glossary ).

3,DCMI metadata registry

DCMI (Dublin Core Metadata Initiative) metadata registry (dcmi mr) is a metadata registration system established by DCMI, the purpose is to develop an authoritative metadata registration for the relationship between DCMI words and terms. It is a system tool that defines and describes metadata standards, application standards, and related semantic Sets Based on the RDF Schema. It supports the metadata standards based on the DC naming domain and its application management.

Dcmi mr is an RDF-based Metadata registration application.

4,Cores metadata registry

Http://www.cores-eu.net/registry/

Iii. Based on automatic release and DiscoveryMr

UDDI registry: UDDI (Universal Description, discovery, and integration) is a registration service mechanism in the Web service system.

Terms:

Registration Authority(Registration authority, RA)

Concept Set(Ontology)

Value Type(Value Domain)

Value Range)

Content Encoding System(Encoding scheme)

Root Concept Set(Root ontology)

Name field(Namespace): the space that uniquely defines metadata elements.

Data Element(Elements): Each namefield defines a set of data elements that have unique meanings in a specific namefield.

Metadata Vocabulary(Metadata Vocabulary): a collection of elements in a naming domain constitutes a metadata vocabulary and provides a collection of words that describe certain content objects.

Application specifications(Application Profile): An application specification is usually used to meet the needs of a specific application domain or application system. elements are selected from multiple naming domains to form a new collection of elements, forming a new metadata vocabulary.

Semantic Layer)

Basic Semantic Units)

Generate a cross-walk page)