VIVO Documentation
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Purpose
Permits external applications to add or remove specific triples from the VIVO data model. These changes use the standard data channels in VIVO, so the search index will be updated as appropriate, and the reasoner will add or remove inferences as needed.
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By default, the SPARQL Update API is disabled in VIVO, for security reasons. See The SPARQL Update Enabling the API. |
Use Cases
Harvester
Previous implementations of the Harvester and similar tools have written directly to the VIVO triple-store, bypassing the usual data channels in VIVO. After ingesting, it was necessary to rebuild the search index, and to run the reasoner to add or remove inferences. Since the search index and the reasoner were not aware of the exact changes, the entire data model was re-indexed and re-inferenced.
When the Harvester and other tools have been modified to use the SPARQL Update API, VIVO will ensure that the search index and inferences are kept in synchronization with the data.
Other ingest tools
This API permits ingest tools such as Karma to programmatically insert data into VIVO without requiring knowledge of VIVOs internal data structures.
VIVO "face" applications
Linked Open Data requests have permitted people to write Drupal applications (for example) that display data from VIVO. This API will permit such applications to accept user edits, and apply them back to VIVO.
Specification
URL
[vivo]/api/sparqlUpdate
Examples:
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http://localhost:8080/vivo/api/sparqlUpdate |
HTTP Method
The API supports only HTTP POST calls. GET, HEAD, and other methods are not supported, and will return a response code of 405 Method Not Allowed
.
Parameters
name | value |
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email | the email address of a VIVO adminstrator account |
password | the password of the VIVO administrator account |
update | A SPARQL Update request |
The syntax for a SPARQL Update request is described on the World Wide Web Consortium site at http://www.w3.org/TR/2013/REC-sparql11-update-20130321/
Limitation
The API requires that you specify a GRAPH in your SPARQL update request. Insertions or deletions to the default graph are not supported.
Response Codes
Code | Reason |
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200 OK | SPARQL Update was successful. |
400 Bad Request | HTTP request did not include an update parameter. |
The SPARQL Update request did not specify a GRAPH. | |
The SPARQL Update request was syntactically incorrect. | |
403 Forbidden | HTTP request did not include an email parameter. |
HTTP request did not include a password parameter. | |
The combination of email and password is not valid. | |
The selected VIVO account is not authorized to use the SPARQL Update API. | |
405 Method Not Allowed | Incorrect HTTP method; only POST is accepted. |
500 Internal Server Error | VIVO could not execute the request; internal code threw an exception. |
Examples
These examples use the UNIX curl
command to insert and delete data using the API.
Insert example
This example inserts a single RDF statement into the data model.
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update=INSERT DATA { GRAPH <http://vitro.mannlib.cornell.edu/default/vitro-kb-2> { <http://test.domain/ns#book1> <http://purl.org/dc/elements/1.1/title> "Fundamentals of Compiler Design" . } } |
Modify example
This example removes the previous statement, and inserts a replacement.
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update=DELETE DATA { GRAPH <http://vitro.mannlib.cornell.edu/default/vitro-kb-2> { <http://test.domain/ns#book1> <http://purl.org/dc/elements/1.1/title> "Fundamentals of Compiler Design" . } } INSERT DATA { GRAPH <http://vitro.mannlib.cornell.edu/default/vitro-kb-2> { <http://test.domain/ns#book1> <http://purl.org/dc/elements/1.1/title> "Design Patterns" . } } |
Delete example
This example removes the modified statement.
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update=DELETE DATA { GRAPH <http://vitro.mannlib.cornell.edu/default/vitro-kb-2> { <http://test.domain/ns#book1> <http://purl.org/dc/elements/1.1/title> "Design Patterns" . } } |
Large Files
For large files one can also use the SPARQL LOAD command.
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Could you also handle large files by increasing the size limit on POST requests? The Tomcat configuration page says that |
A Python example
Ted Lawless of Brown University has created a Python program to illustrate the SPARQL Update API. You can find it here: https://gist.github.com/lawlesst/6300573#file-vupdate-py
Enabling the API
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Before enabling the SPARQL update handler, you should secure the URL |
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