SparqlProtocolDiscussion

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What http protocol should we use before the Sparql protocol spec is finished? This question came up in a gargonza discussion

the official hack

Andy Seaborne: Please, please, please use the latest names (as of the latest editors draft:

http://www.w3.org/2001/sw/DataAccess/proto-wd/

Our hack

( basis from SPARQL spec: http://www.w3.org/TR/rdf-sparql-protocol/)

and the draft: http://www.w3.org/2001/sw/DataAccess/proto-wd/

HTTP Query Parameters

Parameter Name Parameter Value Type Parameter Semantics
query url-encoded querystring Contains a legal sparql query
default-graph-uri string or anyURI default graph
named-graph-uri string or anyURI more graphs for integrated querying

The RDF dataset is composed of one default or background RDF graph, identified by one default-graph-uri type; and by zero or more named RDF graphs, identified by zero or more named-graph-uri types. These correspond to the FROM and FROM NAMED keywords in SPARQL, respectively.

Result has to be in RDF/XML by default, see the example

Other current candidates

http://librdf.org/2005/sparqling

cgiParameter
query
query-lang
data
format
output-xslt
limit

http://www.sparql.org/query.html

  • No graph-id => take base URL as target
Parameter
lang
query
graph-id
stylesheet

this is from http://www.w3.org/TR/rdf-sparql-protocol/ HTTP Query Parameters

Parameter Name Parameter Value Type Parameter Semantics
query FIXME Contains a legal RDF query language ...FIXME...
query-uri anyURI Identifies a legal RDF query language...
query-lang anyURI Identifies the type of RDF query language (FIXME) contained in the query parameter
graph-id string or anyURI Identifies a target graph...SOURCE/FROM (FIXME)
distinct boolean DistinctQueryResults
limit integer LimitQueryResults