Table of contents

IGSN Registry API

Architecture

This API is intended to be used in programs and you will need a valid login. The account data is the same as for the web interface of http://doidb.wdc-terra.org/igsn.

Overview

The API is implemented in REST style. The end point you are going to use is:

https://doidb.wdc-terra.org/igsnaa/

At the moment there are five resources:

/igsn

/metadata

/media

/igsnmetadata

/isometadata

The URI https://doidb.wdc-terra.org/igsnaa/igsn accepts requests with POST HTTP method.

The URI https://doidb.wdc-terra.org/igsnaa/igsn/{igsn}, where {igsn} is a actually IGSN, accepts requests with GET HTTP method.

The URI https://doidb.wdc-terra.org/igsnaa/metadata accepts requests with POST HTTP method.

The URI https://doidb.wdc-terra.org/igsnaa/metadata/{igsn}, where {igsn} is an actual IGSN, accepts requests with 3 HTTP methods: POST, GET, and DELETE

The URI https://doidb.wdc-terra.org/igsnaa/igsnmetadata/{igsn}, where {igsn} is an actual IGSN, accepts requests with 3 HTTP methods: POST, GET, and DELETE

The URI https://doidb.wdc-terra.org/igsnaa/isometadata/{igsn}, where {igsn} is an actual IGSN, accepts requests with 3 HTTP methods: POST, GET, and DELETE

The URI https://mds.datacite.org/media/{igsn}, where {igsn} is an actual IGSN, accepts requests with 2 HTTP methods: GET and POST

In addition HEAD is allowed, whenever GET is.

Characters

IGSN e.V. recommends to create IGSNs according to these Guidelines. The Metadata Store accepts IGSN-URIs only, i.e. IGSNs have to be prefixed with the string "10273/".

Security and Accounts

All the traffic goes via HTTPS. All requests to this system are password protected and require HTTP Basic authentication header.

Accounts have some constraints associated:

  • you will be allowed to mint IGSNs only with prefix assigned to you
  • you will be allowed to mint IGSNs only with URLs in host domains assigned to you
  • the number of IGSNs available for registration can be limited.

Handle System

The Handle System - the technical infrastructure for IGSNs - is a worldwide network system, that caches answers to requests. The consequence of this manifests is its inherent latency. For example, IGSNs have TTL (time to live) defaulted to 24 hours, so your changes will be visible to the resolution infrastructure only when the TTL expires. Also, if you create a IGSN and then immediately try to update its URL, you might get the error message HANDLE NOT EXISTS. This is because it takes some time for the system to register a handle for a IGSN.

Metadata

The IGSNDB accepts three different metadata schemata - IGSN metadata, an extended IGSN metadata schema, and ISO19139. It is possible to generate DataCite metadata through stylesheet transformation by extracting the relevant information from the DIF or ISO schema. Metadata are validated to conform to their specific schema. ISO-metadata is (preferably) INSPIRE conform and validates the validator of the EU. To get an idea how your metadata could look like, please browse the OAI-PMH repository

Metadata about your samples must conform to the standards published by IGSN e.V. at Metadata Schema Repository. You will find an example XML document here. All your documents must specify a correct schema location in the root element. Currently http://doidb.wdc-terra.org/igsn/schemas/igsn.org/schema/0.3/igsn.xsd and http://doidb.wdc-terra.org/igsn/schemas/igsn.org/schema/1.0/igsn.xsd are valid. Also make sure IGSN specified in your document matches IGSN of the sample.

We ask you to provide detailed metadata for discovery of your samples using the detailed schema metadata schema. It is a modified version of the metadata schema used at SESAR

Testing

Each API call can have optional query parametertestMode. If set to "true" or "1" the request will not change the database nor will the IGSN handle will be registered or updated, e.g. POST igsn/igsn?testMode=true.

Also please note that there is special test prefix 20.500.11812 available to all datacentres. Please use it for all your testing IGSNs. Your real prefix should not be used for test IGSNs. Note that IGSNs with test prefix will behave like any other IGSN, e.g. they can be normally resolved. They will not be exposed by upcoming services like search and OAI, though. Periodically we purge all 20.500.11812 samples from the system.

Code examples python

Download the files delete_metadata.py, get_igsn.py, get_metadata.py, post_igsn.py, post_metadata.py, test.url, test.xml in one directory and call them from the command line
  • python post_igsn.py USER PASSWORD test.url
  • python get_igsn.py USER PASSWORD IGSN-HANDLE
  • python post_metadata.py USER PASSWORD test.xml
  • python get_metadata.py USER PASSWORD IGSN-HANDLE
  • python delete_metadata.py USER PASSWORD IGSN-HANDLE

Code examples PHP

Download the file phpcurl.php.

API reference

IGSN API

GET

URI: https://doidb.wdc-terra.org/igsnaa/igsn/{igsn} where {igsn} is a specific IGSN.

This request returns an URL associated with a given IGSN.

Request headers

none

Request body

empty

Response headers

none

Response body

If response status is 200: URL representing a dataset; empty for 204; otherwise short explanation for non-200 status

Response statuses

200 OK - operation successful

204 No Content - IGSN is known to MDS, but is not resolvable (might be due to handle's latency)

401 Unauthorized - no login

403 login problem or dataset belongs to another party

404 Not Found - IGSN does not exist in our database

500 Internal Server Error - server internal error, try later and if problem persists please contact us

GET (list all IGSNSs)

URI: https://doidb.wdc-terra.org/igsnaa/igsn

This request returns a list of all IGSNs for the requesting datacentre. There is no guaranteed order.

Request headers

none

Request body

empty

Response headers

none

Response body

If response status is 200: list of IGSNs, one IGSN per line; empty for 204

Response statuses

200 OK - operation successful

204 No Content - no IGSNs founds

POST

URI: https://doidb.wdc-terra.org/igsnaa/igsn

POST will mint new IGSN if specified IGSN doesn't exist. This method will attempt to update URL if you specify existing IGSN. Standard domains and quota restrictions check will be performed. A Datacentre's QuotaUsed will be increased by 1. A new record in Datasets will be created.

Request headers

Content-Type:text/plain;charset=UTF-8

Request body

igsn={igsn}
url={url}

where {igsn} and {url} have to be replaced by your IGSN and URL, UFT-8 encoded.

Response body

short explanation of status code e.g. CREATED, HANDLE_ALREADY_EXISTS etc

Response statuses

201 Created - operation successful

400 Bad Request - request body must be exactly two lines: IGSN and URL; , wrong domain, wrong prefix

401 Unauthorized - no login

403 Forbidden - login problem, quota exceeded

412 Precondition failed - metadata must be uploaded first

500 Internal Server Error - server internal error, try later and if problem persists please contact us

Metadata API

GET

URI: https://doidb.wdc-terra.org/igsnaa/metadata/{igsn} where {igsn} is a specific IGSN.

This request returns the most recent version of metadata associated with a given IGSN.

Request headers

Accept:application/xml

Request body

empty

Response headers

Content-Type:application/xml

Response body

If response status is 200: XML representing a dataset, otherwise short explanation for non-200 status

Response statuses

200 OK - operation successful

401 Unauthorized - no login

403 Forbidden - login problem or dataset belongs to another party

404 Not Found - IGSN does not exist in our database

410 Gone - the requested dataset was marked inactive (using DELETE method)

500 Internal Server Error - server internal error, try later and if problem persists please contact us

POST

URI: https://doidb.wdc-terra.org/igsnaa/metadata/{IGSN}

This request stores new version of metadata. The request body must contain valid XML.

Request headers

Content-Type:application/xml;charset=UTF-8

Request body

UFT-8 encoded metadata

Response body

short explanation of status code e.g. CREATED, HANDLE_ALREADY_EXISTS etc

Response headers

Location - URL of the newly stored metadata

Response statuses

201 Created - operation successful

400 Bad Request - invalid XML, wrong prefix

401 Unauthorized - no login

403 Forbidden - login problem, quota exceeded

500 Internal Server Error - server internal error, try later and if problem persists please contact us

DELETE

URI: https://doidb.wdc-terra.org/igsnaa/metadata/{igsn} where {igsn} is a specific IGSN.

This request marks a dataset as 'inactive'. To activate it again, POST new metadata or set the isActive-flag in the user interface.

Response body

if response status 200 - XML representing a dataset, otherwise short explanation for non-200 status

Response statuses

200 OK - operation successful: dataset deactivated

401 Unauthorized - no login

403 Forbidden - login problem or dataset belongs to another party

404 Not Found - IGSN does not exist in our database

500 Internal Server Error - server internal error, try later and if problem persists please contact us