SpazioCodice

GraphQL + OWL: Mutations

MUTATION GRAPH QL

In the fourth of our GraphQL + OWL series, we design the “write” side of the system: in GraphQL, Mutations. Mutations, as the name suggests, allow the manipulation of data.  

GraphQL + OWL: Types & Fields

graphQL

The third part of our “GraphQL + OWL” series deals with types and properties, which are the building blocks of ontology and GraphQL.

GraphQL + OWL: Namespaces

GraphQL + OWL: Namespaces

In this article, we begin the implementation of a system providing a GraphQL interface on top of an arbitrary set of ontologies.

Towards a scalable Solr-based RDF Store

Towards a scalable Solr-based RDF Store

SolRDF (i.e., Solr + RDF) is a set of Solr extensions for managing (indexing and searching) RDF data. In a preceding post, I described how to set up a standalone SolRDF instance in two minutes; in this post, I’ll describe how to run SolRDF in a simple cluster. The required steps are similar to what […]

RDF in Solr: HowTo

RDF in Solr: HowTo

The Solr built-in UpdateRequestHandler supports several formats of input data. It delegates the actual data loading to a specific ContentStreamLoader, depending on the content type of the incoming request (i.e., the Content-type header of the HTTP request). Currently, these are the available content types declared in the UpdateRequestHandler class: application/xml or text/xml application/json or text/json application/csv or text/csv application/javabin So, a client has several options […]