Data Retrieval APIs

Data Retrieval APIs provide access to to Information Retrieval facilites over large heterogeneous environments, offering a declarative approach for querying the hosted information and allowing for easy integration of external data sources of information.

This page outlines the design rationale for those APIs.

Overview

Name	Description	Type	Protocol	Framework
gCQLParser	The gCube parser for CQL language (extended with gCube elements)	Java	Local	none
Index Service	Provides indexing functionality for the resources	WS	SOAP	gCore
OperatorLibrary	The search operators cover the basic functionality that could be encountered in a typical search operation	Java	Local	none
Search System Service	Web service that offers information retrieval functionality in a gCube infrastructure.	WS	SOAP	gCore
OpenSearch Library	The OpenSearch Core Library conforms to the latest OpenSearch specification and provides general OpenSearch-related functionality to any component which needs to query OpenS earch providers.	CL	Local	none
OpenSearchService	TThe OpenSearch Service is a stateful web service responsible for the invocation of the OpenSearch Operator in the context of the provider to be queried.	WS	SOAP	gCore