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Datacite
This section describes the aggregation workflow of Datacite and the mapping implemented for it.
Datacite datasource
Datacite is a leading global non-profit organisation that provides persistent identifiers (DOIs) for research data and other research outputs.
Datacite API
The DataCite REST API allows users to retrieve, query, and browse DataCite DOI metadata records. In particular, it exposes a method for incremental harvesting new datacite records.
https://api.datacite.org/dois?page[cursor]=$CURSOR&page[size]=$NUMBER_OF_ITEM_PER_PAGE&query=updated:[$FROM_DATE_TIMESAMP TO $TO_DATE_TIMESAMP]
On this API Request, we introduce some variables:
- CURSOR: The value of the cursor to iterate the pages
- NUMBER_OF_ITEM_PER_PAGE: (max 1000) defines how many records we can download for each page.
- FROM_DATE_TIMESAMP, TO_DATE_TIMESAMP interval timestamp of the updated record
Each record contains two pieces of information needed for incremental harvesting:
- isActive: tell if the record is deleted (isActive:false)
- updated: timestamp of last update
Collection Workflow
The collection workflow is responsible for aggregating new datacite records. Each record is stored on a table called Native Datacite Store with the following schema:
- DOI: The DOI PID of the datacite record (It is a primary key)
- update_timestamp: the last update date timestamp
- json: the native record JSON
During the collection workflow, we identify the most updated record date, and the collection phase downloads all new datacite records and update the existing one through the API using this date as FROM_DATE_TIMESAMP variable.
Datacite Mapping
The table below describes the mapping from the XML baseline records to the OpenAIRE Graph dump format.
| OpenAIRE Result field path | Datacite record JSON path | # Notes |
|---|---|---|
id |
\attributes\doi |
the identifier will be created by folloing the openaire PID generation policy |
instanceinstance.type |
\attributes\types\resourceType \attributes\types\resourceTypeGeneral attributes\types\schemaOrg |
Use the vocabulary dnet:publication_resource to find a synonym to one of these terms and get the instance.type. Using the dnet:result_typologies vocabulary to find the instance.type synonym we can get one of the main entity: publication dataset software otherresearchproduct |