The Linked Data Interactions Repo (LDI) is a bundle of basic components used to receive, generate, transform and output Linked Data. This project is set up in the context of the VSDS Project to ease adopting LDES on data consumer and producer side.
The LDI API provides a bundle of generic interfaces and classes to be used in the LDI Components
For further information, please refer to the JavaDoc.
The LDI Core module contains the components maintained by the VSDS team in order to accommodate the onboarding of LDES onboarders.
Each Component can be wrapped in a desired implementation framework (LDI-orchestrator, NiFi, ...) to be used.
More documentation on the individual component can be found here
The VSDS team currently supports and maintains two implementation frameworks in which the Components can be run.
What follows is a list of all available components for each framework.
| Component | Component Description | LDI Orchestrator | LDI NiFi |
|---|---|---|---|
| Create Version Object | Will transform a state object into a version object | x | x |
| Version Materialisation | Will transform a version object into a state object | x | x |
| Geo Json to WKT | Will transform any available Geo JSON data to WKT format | x | x |
| LDES Client | Allows replicating and synchronizing with a Linked Data Event Stream | x | x |
| NGSI v2 to LD | Allows transformation of NGSIv2 JSON data into NGSI-LD | x | x |
| SPARQL Construct | Allows transformation of Linked Data via provided SPARQL query | x | x |
| SPARQL SELECT | Allows querying of Linked Data via SPARQL query | x | |
| RDF4J Repo Materialisation | Allows materialisation of an LDES stream into a triplestore | x | x |
Apache NiFi is a powerful data integration tool that enables organisations to manage and process their data flows in real-time.
For further details on how to use our components in NiFi, please refer to the in-NiFi documentation.
As NiFi can be quite extensive for setting up a basic Linked Data transformation, we provide an alternative lightweight Spring Boot based framework.
For further details on how to use our components in the LDI Orchestrator, please refer to the LDI Orchestrator documentation