[OAI-implementers] oai_dc metadata format

[Thomas G. Habing]

Todd White wrote:

> while we're on the subject of the required oai_dc format, i'm hoping
> someone(s) can verify for me that the following XML for the
> standard/required oai_dc format is NOT valid.  (the Open Archives
> Initiative - Repository Explorer already did, but any further
> validation/comments will be most appreciated.)
> 
> specifically, the attribute/values -- xsi:type="dct:DCMIType" and
> xsi:type="dct:URI" -- are not allowed, correct?

It is definitely not valid.  It looks they are trying to use Qualifed DC 
which is not allowed by the simple oai_dc XML Schema. There are XML Schema 
for Qualified Dublin Core that use the xsi:type attribute to specific 
Qualifed DC encoding schemes.  See 
http://www.dublincore.org/schemas/xmls/qdc/2003/04/02/notes/ for details. 
If the provider wanted to provide Qualifed DC with the xsi:type attributes 
they could use one of the container schema provided from the above URL.

> 
> the following comes from:
> http://www.archive.org/services/oai.php?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai:archive.org:texts/64276
> 
> ==================  begin XML source  ===========================
> - <metadata>
> - <oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/"
> xmlns:dc="http://purl.org/dc/elements/1.1/"
> xmlns:dct="http://purl.org/dc/terms/"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/
> http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
>   <dc:title>Maikada</dc:title> 
>   <dc:creator>Rahman Jami</dc:creator> 
>   <dc:subject>Poetry</dc:subject> 
>   <dc:date>2003</dc:date> 
>   <dc:type xsi:type="dct:DCMIType">Text</dc:type> 
>   <dc:identifier
> xsi:type="dct:URI">http://www.archive.org/texts/texts-details-db.php?id=64276</dc:identifier> 
>   <dc:rights>This collection is free and open for everyone to use. Our
> goal in digitizing these texts and putting them online is to provide easy
> access to a rich and fascinating core collection of archival texts. By
> providing near-unrestricted access to these texts, we hope to encourage
> widespread use of moving images in new contexts by people who might not
> have used them before.</dc:rights> 
>   </oai_dc:dc>
>   </metadata>
> ==================  end XML source  ===========================
> 
> 
> 
> Todd M. White 
> Systems Research Programmer
> 734.647.8649 (direct) ~~~ http://www.merit.edu/~tmwhite/
> 
> Merit Network, Inc.
> 4251 Plymouth Road, Suite 2000, Ann Arbor, MI  48105-2785
> 734.764.9430 (general) ~~~ 734.647.3745 (fax)
> http://www.merit.edu/
> 
> Avoid people who say they know the answer.
> Keep the company of people who are trying to understand the question.
> 
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-- 
Thomas Habing
Research Programmer, Digital Library Projects
University of Illinois at Urbana-Champaign
155 Grainger Engineering Library Information Center, MC-274
thabing@uiuc.edu, (217) 244-4425
http://dli.grainger.uiuc.edu