VLO Facets

Relationships

Currently, the CLARIN-D Centers use different means to represent relationships between resources. In the following, some of these representations are analyzed.

HZSK

HZSK represents all resources of a corpus in one CMDI record. Thus, the target of a relationship (<ResourceRef?>) has always type (ResourceType?) Resource. The individual resources are further specified in the component part of the CMDI record by refering to the <ResourceProxy?> via its id attribute.

Example:

​http://virt-fedora.multilingua.uni-hamburg.de/drupal/fedora/repository/cmdi:demo/cmdi/metadata.xml

<ResourceProxy id="ACDIMB865D8-D9BA-7F9B-E652-D00D960850B4">
  <ResourceType mimetype="text/xml">Resource</ResourceType>
  <ResourceRef>http://hdl.handle.net/11858/00-248C-0000-000E-0181-F</ResourceRef>
</ResourceProxy>
...
<HZSKTranscription ComponentId="clarin.eu:cr1:c_1345561703658" ref="ID8392DD18-04C3-9DC7-A7F5-2FA8A3639EA4">
  <Name>Rudi Völler Wutausbruch</Name>
  <TranscriptionConvention>HIAT (simplified)</TranscriptionConvention>
  ...
</HZSKTranscription>

BAS

BAS represents the resources of a corpus by several CMDI records, and employs a variety of approaches to represent relationships:

1. The relationship between the CMDI record for a corpus and its parts is specified explicitly in one direction by means of CMDI's built-in <isPartOf> element.
2. Relationships with a target of type Resource are further specified in the component part of the CMDI record by referring to the <ResourceProxy?> via its id attribute
3. Relationships between individual components, such as from <media-file> to <media-session-actor> are represented by referring to the target's id attribute as well.

Example:

​https://clarin.phonetik.uni-muenchen.de/BASRepository/Public/Corpora/ZIPTEL/ZIPTEL.2.cmdi.xml

<ResourceProxy id="c_0000000001">
  <ResourceType mimetype="text/xml">Metadata</ResourceType>
  <ResourceRef>https://clarin.phonetik.uni-muenchen.de/BASRepository/Public/Corpora/ZIPTEL/0001.2.cmdi.xml</ResourceRef>
</ResourceProxy>

​http://catalog.clarin.eu/oai-harvester/cmdi-providers/harvested/results/cmdi/Bayerisches_Archiv_f_r_Sprachsignale/oai_BAS_repo_Corpora_ZIPTEL_0001.xml or ​https://clarin.phonetik.uni-muenchen.de/BASRepository/Public/Corpora/ZIPTEL/0001.2.cmdi.xml

<ResourceProxy id="r_0000000001">
  <ResourceType mimetype="audio/raw">Resource</ResourceType>
  <ResourceRef>https://clarin.phonetik.uni-muenchen.de/BASRepository/Corpora/ZIPTEL/0001/z10001z2.dea</ResourceRef>
</ResourceProxy>
...
<IsPartOfList>
   <IsPartOf>https://clarin.phonetik.uni-muenchen.de/BASRepository/Public/Corpora/ZIPTEL/ZIPTEL.2.cmdi.xml</IsPartOf>
</IsPartOfList>
...
<media-file actor-ref="s_0000000001" ref="r_0000000001">
  <Type>audio</Type><Quality>3</Quality>
  <RecordingConditions>un-supervised answering of a question prompted via telephone</RecordingConditions>
...
</media-file>
...
<media-session-actor id="s_0000000001">
  <Role>question answering</Role> 
  <Name>unspecified</Name>
  <FullName>unspecified</FullName>
  <Code>0001</Code>
  ...
</media-session-actor>

IDS-Mannheim

IDS-Mannheim represents resources by several CMDI records, and employs a variety of approaches to represent relationships:

1. The first version of the historical newspaper corpus MKHZ represents relationships by <ResourceProxy?> as well as OLAC-Dcmi-Terms elements such as <hasPart>, were both point to a PID (see for example ​http://repos.ids-mannheim.de/fedora/objects/clarind-ids:mkhz.000000/datastreams/CMDI/content)
2. The second version of the historical newspaper corpus represents relationships by <ResourceProxy?> and further specifies the semantics (and anchor text) of the relationship in the component part of the relationship (see for example ​http://repos.ids-mannheim.de/fedora/objects/clarin-ids:mkhz1.00000/datastreams/CMDI/content)
3. Relationships in the corpora of spoken language are represented by ResourceProxy?'s only, and partOf relationships are further specified by means of CMDI's built-in <IsPartOf?> element (see for example ​http://repos.ids-mannheim.de/fedora/objects/clarin-ids:folk.FOLK_S_00248.cmdi/datastreams/CMDI/content)

Leibzig

TBD when the webservice is available again.

Summary on Representation of Relationships

TBD.

Example Profiles

Background Information