SOH - SPARQL over HTTP

SOH (SPARQL Over HTTP) is a set of command-line scripts for working with SPARQL 1.1. SOH is server-independent and will work with any compliant SPARQL 1.1 system offering HTTP access.

SOH is written in ruby.

Commands:

  • s-http – SPARQL 1.1 HTTP Protocol
  • s-get, s-put, s-delete, s-post, s-head – abbreviation for s-http get ... etc.
  • s-query – SPARQL 1.1 Query, both GET and POST of queries.
  • s-update – SPARQL 1.1 Update
  • s-update-form – SPARQL 1.1 Update using the HTML form and a parameter of request=.

Each command supports the -v flag to print out details of the HTTP interaction.

Contents

SOH SPARQL Query

s-query --service=endpointURL 'query string'

s-query --service=endpointURL --query=queryFile.rq

SOH SPARQL HTTP

The SPARQL Graph Store Protocol is a way to read, create and update whole graphs in an RDF Dataset. It is useful for data management and building into automated processes because it is easy to script with tools like curl or wget.

SOH provides commands that simplify the use HTTP further by setting HTTP headers based on the operation performed.

The syntax of the commands is:

s-http VERB datasetURI graphName [file]

where graph name is a URI or the word default for the default graph.

s-get, s-put, s-delete, s-post are abbreviations for s-http get, s-http put, s-http delete and s-http post respectively.

file is needed for PUT and POST. The file name extension determines the HTTP content type.

 s-put http://localhost:3030/dataset default data.ttl

 s-get http://localhost:3030/dataset default

 s-put http://localhost:3030/dataset http://example/graph data.ttl

 s-get http://localhost:3030/dataset http://example/graph

SOH SPARQL Update

s-update --service=endpointURL 'update string'

s-update --service=endpointURL --update=updateFile.ru

Service endpoints

SOH is a general purpose set of scripts that work with any SPARQL 1.1. server. Different servers offer different naming conventions for HTTP REST, query and update. This section provides summary information about using SOH with some servers. See the documentation for each server for authoritative information.

If you have details for other servers, get involved

Fuseki

If a Fuseki server is run with the command:

fuseki-server --update --mem /MyDataset

then the service endpoints are:

  • HTTP: http://localhost:3030/MyDataset/data
  • Query: http://localhost:3030/MyDataset/query or http://localhost:3030/MyDataset/sparql
  • Update: http://localhost:3030/MyDataset/update