Database.HaSparqlClient.Types
Description
Type definitions.
- data BindingValue
- data Service = Sparql {}
- type Endpoint = String
- type Query = String
- type DefaultGraph = Maybe String
- type NamedGraph = String
- type ExtraParameters = (Key, Value)
- type Key = String
- type Value = String
- data Method
- defaultService :: Service
SELECT binding value
data BindingValue Source
Representation for SELECT query result format.
Constructors
| URI String | URI reference to remote resource. |
| Literal String | Literal string without datatype or lang. |
| TypedLiteral String String | Literal with datatype URI. |
| LangLiteral String String | Literal with language. |
| BNode String | Blank Node with label. |
| Unbound | Unbound result value. |
Instances
| Eq BindingValue | |
| Show BindingValue | |
| ShowQuery BindingValue | SPARQL XML representation for |
SPARQL service
Local representation for a SPARQL service.
Constructors
| Sparql | |
Fields
| |
Required elements
Optional elements
type DefaultGraph = Maybe StringSource
Add a default graph URI. Overrides the default graph from SPARQL queries.
type NamedGraph = StringSource
Add a named graph URI. Overrides named graphs from SPARQL queries.
type ExtraParameters = (Key, Value)Source
Some SPARQL endpoints require extra key value pairs. E.g., in Virtuoso Server, one would add should-sponge=soft to the query forcing virtuoso to retrieve graphs that are not stored in its local database. Can be for example, used to try others output formats in RunQuery depending on the server.
Arguments
| = String | named-graph-uri and default-graph-uri keys not allowed here. They're removed. |
key of the query part.
Request method
Set to HTTP GET or POST request, according to the SPARQL protocol, some endpoints do not yet support POST requests. Some SPARQL queries, perhaps machine generated, may be longer than can be reliably conveyed by way of the HTTP GET. In those cases the POST may be used.