1.
www.eudat.euEUDAT receives funding from the European Union's Horizon 2020 programme - DG CONNECT e-Infrastructures. Contract No. 654065
Persistent Identifiers in EUDAT
services
PIDs in EUDAT
Version 2
June 2017
This work is licensed under the Creative
Commons CC-BY 4.0 licence

2.
The EUDAT data domain handles registered data
Each digital object should have a persistent identifier
This persistent identifier is used for:
Replica identification
Identification of the repository of record (in the case of
replication)
Querying of additional information
Checksum (time stamped)
Actionable PIDs:
Of the form http://<resolver>/<prefix>/<suffix>
PIDs in EUDAT

3.
The EUDAT Service Suite + PIDs
http://www.eudat.eu/services
Supports living objects  no PIDs
PIDs (collections, files)  referable
PIDs (collection, files)  long-term
preservation
User Access no PIDs
PIDs  fetch data
PIDs  refer to data
PID management

4.
B2SHARE
A user-friendly, reliable and trustworthy tool for researchers, scientific
communities and citizen scientists to store and share small-scale
research data coming from diverse contexts.
PIDs to every data collection, to make them
referable, and to every file to ease
automatic downloads

5.
B2SHARE: The process
- Assigns PIDs to every data collection
to allow citation
- Assigns PIDs to every file and also stores the checksum
to allow automatic download and
integrity checks

6.
B2SHARE
The persistent identifier
for the collection

7.
B2SHARE
The persistent identifier
for files

8.
B2SAFE
A robust, safe and highly available service which allows community
and departmental repositories to implement data management
policies on research data across multiple administrative domains, in a
trustworthy manner
PIDs at file level, for long-term preservation and
linking replicas and their originals

9.
B2SAFE: What happens step by step?
iRods
PID
Data Center
Store 1
Community repository
Digital Object (DO) unique identifier
(PID) to the DO
PID
Data ingestion
Data replication
own PID
system
OR
iRODS rules
iRods
CommunityCentre
iRods
PID
Data Center
Store 2
Based on community policy
PID assignment

10.
B2SAFE: Original DO and replicas

11.
B2STAGE
A reliable, efficient, light-weight and easy-to-use service to transfer
research data sets between EUDAT storage resources and high-
performance computing (HPC) workspaces.
PIDs, to fetch data
Transfer large data collections
In conjunction with B2SAFE,
replicate community data sets,
ingesting them onto EUDAT
storage resources for long-term
preservation
Ingest computation results into the
EUDAT infrastructure

12.
B2STAGE

13.
B2STAGE

14.
B2FIND
a discovery service offering a simple, user-friendly metadata
catalogue of research data collections stored in EUDAT data centres
and other repositories.
PIDs, as source identifier
Find collections of scientific data
quickly and easily, irrespective of
their origin, discipline or community
Get quick overviews of available
data
Browse through collections using
standardised facets

15.
B2FIND
Metadata are harvested from various research
community repositories spanning a wide scope of
research disciplines. The benefit for the communities
publishing metadata in EUDAT is improved visibility
and discoverability of their research data in an
interdisciplinary, pan-European scope.

16.
B2FIND – B2SHARE Community
PID Training
The Source is an
identifier, therefore a
unique string that
identifies the
resource. It may link
to the data resource
itself or to a landing
page that points to
the data.
You may also find
PID as an alternate
identifier.
B2FIND uses B2SHARE
PIDs

17.
B2FIND – SDL Community
PID Training
The SDL
community
supports DOI as
alternate identifier
B2FIND uses PID and DOI
from the SDL Community.

18.
B2HANDLE
EUDAT has adopted Handle-based persistent identifiers based on a
solution combining the Handle technology and the EPIC federation.
B2HANDLE is a central service for managing persistent identifiers at
EUDAT.
PID management
Why Handles?
Stable globally unique IDs,
stable cross-Links
Simple Integration

19.
PIDs created with B2HANDLE provide the abstraction
layer between a globally unique persistent identifier and
physical location of data objects
Follows policies to register data and make it long term
referable and citable
Assignment of prefix via one of the EUDAT partners
Hosting of PIDs, i.e. operation and maintenance of
Handle servers and technical services
Benefits of the B2HANDLE service

20.
Replication for reliability and safe-keeping of PIDs via the
EPIC federation
Resolution mechanism based on Handle
Easy maintenance and programmatic resolving of PIDs by
the B2HANDLE Python library for general interaction with
Handle servers
Benefits of the B2HANDLE service

21.
B2HANDLE – The Python library
b2handle: A Python library for interaction with the EUDAT
B2HANDLE service
setuptools-enabled Python package; easy to deploy
Requires access to one of the EUDAT Handle server
sites
Technical documentation:
http://eudat-
b2safe.github.io/B2HANDLE

22.
B2HANDLE – B2SAFE example
Where: Offers integration into iRODS via a script.
This comes out of the box with a dedicated script
employing the B2HANDLE python library
How: The script takes credentials as input
Supplied on the command line (or)
Stored in a configuration file (iRODS or local fs)
What: The script supports the following actions
Searching
Resolving
Creation of PIDs with metadata specific to B2SAFE
Modification

23.
Conclusions
PIDs run through the EUDAT services
B2HANDLE aids the creation and management of PIDs,
through web and programmatic interfaces
The B2SHARE, B2SAFE and B2STAGE services create
PIDs for digital objects created within EUDAT.
B2FIND lists PIDs together with the rest of the metadata
it collects
EUDAT data can me accessed through the use of PIDs.
PID Training

24.
Thanks

25.
www.eudat.eu
Authors Contributors
This work is licensed under the Creative Commons CC-BY 4.0 licence
EUDAT receives funding from the European Union's Horizon 2020 programme - DG CONNECT e-Infrastructures.
Contract No. 654065
Themis Zamani, GRNET
Willem Elbers, CLARIN
Christine Staiger, SURFsara
Ellen Leenarts, DANS
Kostas Kavoussanakis, EPCC
Thank you