Andy Powell, UKOLN, University of Bath
Version: 1.2
This document specifies the set of metadata elements that should be used by RDN hubs to describe each metadata record stored in an RDN Internet Resource Catalogue (IRC). Hubs may use additional elements as appropriate, but should note that such usage may not be interoperable with other RDN partners.
| Element | Definition | Property |
|---|---|---|
| Record created date | The date that the record was first created | dcterms:created (scheme=W3CDTF) |
| Record creator | The name or email address of the person who first created the record | dc:creator |
| Record last-modified date | The date that the record was last modified | dcterms:modified (scheme=W3CDTF) |
| Record last-modified by | The name or email address of the person who last modified the record | dc:contributor |
| Record last-reviewed date | The date that the record was last manually reviewed against the resource | rdnterms:dateReviewed (scheme=W3CDTF) (refinement of dc:date) |
| Record last-reviewed by | The name or email address of the person who last reviewed the record | rdnterms:reviewer (refinement of dc:contributor) |
| Record last-link-checked date | The date that the dc:identifier in the record was last automatically link-checked | rdnterms:dateLinkChecked (scheme=W3CDTF) (refinement of dc:date) |
| Record last-link-checked HTTP status | The HTTP status code returned by the last automatic link-check for the record | rdnterms:linkCheckHTTPStatus |
| Record publisher | The publisher of the record, typically a hub or gateway | dc:publisher |
| Record owner | The name or email address of the owner of the record | rdnterms:owner |
| Record language | The language of the metadata, encoded according to RFC 3066 (typically en-GB) | dc:language (scheme=RFC3066) |
| Record rights | A rights statement about the record | dc:rights |
| Record source | The URL of the hub/gateway HTML view of the full record | dc:source (scheme=URI) |
Of these, dc:rights, dc:source and dc:publisher must be supplied, the rest are optional.
RDN admin metadata must be encoded in the 'about' section of an OAI-PMH record.
Where the OAI-PMH is being used to exchange simple DC (oai_dc) metadata records, the 'about' section should use the oai_dc schema. For example:
| [OAI-PMH oai_dc example] [ validate] |
...
<about>
<oai_dc:dc ...>
<dc:publisher>http://www.sosig.ac.uk/</dc:publisher>
<dc:rights>This metadata record is copyright an RDN partner. Personal and
educational use is allowed. All other use prohibited without permission.
http://www.rdn.ac.uk/copyright/</dc:rights>
<dc:source>http://www.sosig.ac.uk/resource?query=916739272-28853&database=SOSIG</dc:source>
</oai_dc:dc>
</about>
...
|
Where the OAI-PMH is being used to exchange RDN DC (rdn_dc) or IEEE LOM (lom) metadata records, the 'about' section should use the properties and encoding schemes in the right-hand column above and the RDN OAI rdn_dc XML schema(s). For example:
| [OAI-PMH rdn_dc example] [ validate] |
...
<about>
<rdn_dc:rdndc ...>
<dcterms:created xsi:type="dcterms:W3CDTF">2001-12-20</dcterms:created>
<dc:creator>d.hiom@bristol.ac.uk</dc:creator>
<dcterms:modified xsi:type="dcterms:W3CDTF">2002-01-30</dcterms:modified>
<dc:contributor>emma.place@bristol.ac.uk</dc:contributor>
<rdnterms:dateReviewed xsi:type="dcterms:W3CDTF">2002-10-10</rdnterms:dateReviewed>
<rdnterms:reviewer>jasper.tredgold@bristol.ac.uk</rdnterms:reviewer>
<rdnterms:dateLinkChecked xsi:type="dcterms:W3CDTF">2002-10-10</rdnterms:dateLinkChecked>
<rdnterms:linkCheckHTTPStatus>200</rdnterms:linkCheckHTTPStatus>
<dc:publisher>http://www.sosig.ac.uk/</dc:publisher>
<dc:language xsi:type="dcterms:RFC3066">en-GB</dc:language>
<dc:rights>This metadata record is copyright an RDN partner. Personal and
educational use is allowed. All other use prohibited without permission.
http://www.rdn.ac.uk/copyright/</dc:rights>
<dc:source xsi:type="dcterms:URI">http://www.sosig.ac.uk/resource?query=916739272-28853&database=SOSIG</dc:source>
</rdn_dc:rdndc>
</about>
...
|
Where RDN records are being encoded according to the RDN/LTSN LOM application profile it may be appropriate to encode the admin metadata within the '3. meta-metadata' container element. This should be done using the following mapping:
| LOM element | Notes | Mandatory, Desirable or Optional |
RDN admin metadata mapping |
|---|---|---|---|
| 3. meta-metadata | D | ||
| 3.1 identifier | O | ||
| 3.1.1 catalog | "URI" | O | |
| 3.1.2 entry | use the oai-identifier assigned to the record in the OAI repository | O | |
| 3.2 contribute | O | ||
| 3.2.1 role | "creator" | O | |
| 3.2.2 entity | O | dc:publisher | |
| 3.2.3 date | O | dcterms:created | |
| 3.3 metadatascheme | "LOMv1.0" | D | |
| 3.4 language | a language encoded according to RFC 3066 | O | dc:language |
Elements that are emboldened in grey table cells are those elements that contain descriptive values. All other elements are either structural container elements used in the IEEE LOM XML binding or elements that contain the fixed value shown in the 'notes' field.
For example, the admin metadata above would be encoded in LOM in the following way:
...
<metaMetadata>
<identifier>
<catalog>URI</catalog>
<entry>oai:sosig.ac.uk:916739272-28853</entry>
</identifier>
<contribute>
<role>
<source>LOMv1.0</source>
<value>creator</value>
</role>
<entity>BEGIN:VCARD\nORG:SOSIG\nEND:VCARD</entity>
<date>2001-12-20</date>
</contribute>
<metadataSchema>LOMv1.0</metadataSchema>
<language>en-GB</language>
</meta-metadata>
...
|