Metadata Registry

This is an edited version of the Metadata Registry Raw Use Case

The NSDL Registry is intended to provide a complete vocabulary development and management environment for development of controlled vocabularies. Services are primarily directed at vocabulary owners and include provisions for:

managing access and editing rights for groups of vocabulary maintainers maintaining individual vocabularies
import and management of existing vocabularies, with and without existing URIs
namespace management and maintenance services providing permanent URIs
registered users to receive notifications of changes to vocabularies to which they have subscribed
content negotiation for retrieval of registered vocabularies in various formats -- currently RDF/XML (rdf), XHTML (html), and XML Schema (xsd)
content negotiation and resolution services for registered vocabularies in non-registry namespaces (in alpha)
controlled concept editing and maintenance using SKOS properties
controlled editing of reciprocal relationships between concepts
Requires: SKOS:status in order to manage reciprocal endorsement
controlled mapping of relationships between concepts in different vocabularies. See RucMetadataRegistryExtended
Requires: SKOS mapping, especially to indicate concept equivalence
concept-level change history management
Requires: URI content negotiation and http 301/302 redirection
vocabulary- and concept-level version management (in alpha)
multilingual vocabulary maintenance
Requires: the ability to manage concept equivalence between vocabularies in different languages and intra-concept language-related equivalence between concept properties in multiple languages
skos validation by user input constraint and validation of imported vocabularies [R16]
search and browse for concepts by label

The registry currently has a number of vocabularies registered. A sample entry of a vocabulary/scheme and a single concept is below...

<?xml version="1.0" encoding = "UTF-8"?>
<rdf:RDF
    xmlns="http://www.w3.org/2004/02/skos/core#"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
    xmlns:skos="http://www.w3.org/2004/02/skos/core#"
    xmlns:dc="http://purl.org/dc/elements/1.1/">
<!-- Scheme: NSDL Education Level Vocabulary -->
    <skos:ConceptScheme rdf:about="http://metadataregistry.org/uri/NSDLEdLvl">
        <dc:title>NSDL Education Level Vocabulary</dc:title>
        <skos:hasTopConcept rdf:resource="http://metadataregistry.org/uri/NSDLEdLvl/1000"/>
        <skos:hasTopConcept rdf:resource="http://metadataregistry.org/uri/NSDLEdLvl/1018"/>
    </skos:ConceptScheme>

<!-- Concept: Pre-Kindergarten  -->
    <skos:Concept rdf:about="http://metadataregistry.org/uri/NSDLEdLvl/1002">
        <skos:inScheme rdf:resource="http://metadataregistry.org/uri/NSDLEdLvl"/>
        <skos:prefLabel>Pre-Kindergarten</skos:prefLabel>
        <skos:altLabel>Nursery School</skos:altLabel>
        <skos:altLabel>Pre-K</skos:altLabel>
        <skos:altLabel>Preschool</skos:altLabel>
        <skos:broader rdf:resource="http://metadataregistry.org/uri/NSDLEdLvl/1001"/>
        <skos:definition>Activities and/or experiences that are intended to effect developmental changes in children, from birth to entrance in kindergarten (or grade 1 when kindergarten is not attended) [ERIC]</skos:definition>
        <skos:historyNote>Term source: http://www.ed.gov&lt;/skos:historyNote</skos:historyNote>
        <skos:broader rdf:resource="http://metadataregistry.org/uri/NSDLEdLvl/1001"/>
    </skos:Concept>
</rdf:RDF>