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Namespace | URL |
fedora | |
dc | |
| access |
Fedora 4 data model for ResData
Figure 1 below presents a top level view of the Fedora 4 data model for ResData.
Figure 1: Fedora 4 data model for ResData
ResData Ontology Classes
The ResData Fedora 4 data model is an adaptation of the PCDM model, integrated with a customised version of ANDS VITRO ontology. The resultant ontology consists mainly of the following classes:
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Activities, Datasets, Parties (pcdm:Collection)
Activities, Datasets, and Parties are Fedora 4 container nodes of pcdm:Collection type, mainly intended to enable grouping of the three main ResData resource types, i.e. Activity, Dataset and Party. Fedora 4 URI structures for these pcdm:Collection containers are listed below:
Container name | URL |
Activities | /rest/activities |
Datasets | /rest/datasets |
Parties | /rest/parties |
Dataset (VITRO-ANDS:ResearchData, pcdm:Object)
The ResearchData class from the ANDS VITRO ontology is used to define the Dataset resource type in ResData. In the Fedora 4 model for ResData, all instances of the ResearchData class are also defined as nodes of pcdm:Object type with a number of data properties containing descriptive metadata, and object properties containing reference to other related ResData resources, such as Activity (vivo:ResearchActivity), Party (foaf:Person) and other Dataset resources. Figure 2 bellow illustrates the combined use of pcdm:Object and VITRO-ANDS:ResearchData classes to represent various ResData resource types.
Figure 2: ResData Dataset resource defined as pcdm:Object
Fedora 4 URI structures for ResData Dataset-related nodes are as below:
Description | URL |
Dataset | /rest/datasets/[dataset pairtree id] |
Access | /rest/datasets/[dataset pairtree id]/access |
Licence | /rest/datasets/[dataset pairtree id]/licence |
Methodology | /rest/datasets/[dataset pairtree id]/methodology |
Time Period | /rest/datasets/[dataset pairtree id]/timePeriod |
Retention Period | /rest/datasets/[dataset pairtree id]/retentionPeriod |
Subject | /rest/datasets/[dataset pairtree id]/subject |
Publication | /rest/datasets/[dataset pairtree id]/publication |
GEO | /rest/datasets/[dataset pairtree id]/geo |
Rights | /rest/datasets/[dataset pairtree id]/rights |
Storage | /rest/datasets/[dataset pairtree id]/storage |
ms21:PartyRelation
PartyRelation is a custom class for describing a user-specified relation between a Party and a Dataset. Instances of PartyRelation in the ResData Fedora 4 model are also defined as pcdm:Object type nodes.
Fedora 4 URI structures for the PartyRelation nodes are:
Description | URL |
Dataset | /rest/datasets/[dataset pairtree id] |
PartyRelation | /rest/datasets/[dataset pairtree id]/partyRelation1 |
ms21:ResourceRelation
ResourceRelation is a custom class for describing user-defined relationships between Dataset resources. Instances of ResourceRelation in the ResData Fedora 4 model are also defined as pcdm:Object type nodes.
Fedora 4 URI structures for the ResourceRelation nodes are:
Description | URL |
Dataset | /rest/datasets/[dataset pairtree id] |
ResourceRelation | /rest/datasets/[dataset pairtree id]/resourceRelation1 |
Activity (vivo:ResearchActivity, pcdm:Object)
The ResearchActivity class from the VIVO ontology is used to define Activity type resources in ResData. In the Fedora 4 model for ResData, all instances of the ResearchActivity class are also defined as nodes of pcdm:Object type with a number of data properties containing descriptive metadata and object properties containing reference to additional information about a research project, including funding body and affiliation. Figure 3 bellow illustrates how pcdm:Object and vivo:ResearchActivity classes are combined to represent Activity-type resources in ResData Fedora 4 model.
Figure 3: Activity-type resources in Fedora 4 model for ResData
Fedora 4 URI patterns for ResData Activity-type resources are:
Description | URL |
Activity | /rest/activities/[activity pairtree id] |
Funding | /rest/activities/[activity pairtree id]/funding |
Organisation | /rest/activities/[activity pairtree id]/organisation |
Party (foaf:Person, pcdm:Object)
Similar to Dataset and Activity, all Party-type resources are defined as instances of both the Person class from the FOAF ontology and the pcdm:Object class (Figure 4).
Figure 4: ResData Party defined as pcdm:Object
Fedora 4 URI patterns for ResData Party-type resources:
Description | URL |
Activity | /rest/parties/[party pairtree id] |
Funding | /rest/parties/[party pairtree id]/organisation |
ResData Namespaces
Namespace | URL |
bibo | |
owl | |
ms21 | http://www.unsworks.unsw.edu.au/ontology/preservation-metadata/ |
VITRO-ANDS | |
core | |
foaf | |
pcdm |
UNSWorks Data Model
Figure 5: UNSWorks Data Model
Note: All classes are derived from existing classes used on Fedora 3 used in RELS-INT and RELS-EXT
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Property | Sub-property of | Range | Note |
unsworksp:migratedFrom |
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unsworksp:rights
Rights class individual represent a licence or agreements that author of the electronic resource has signed. Similar to resource, it can link to same type another metadata for preservation purpose
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Datastream types (inline, managed, redirect, and external)
Identifiers
The PairTree algorithm is the default method for generating identifiers in Fedora 4 default. This method will be used for the migration and a new object to address the performance issue about limiting the number of children under a single resource (Performance). As for the legacy PID, it will be stored as a property of the node as mentioned above. For example, refer to the URL structures on Data Model section.
Indexing strategies (GSearch, RI-Search vs. F4 approaches)
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