# module soprano

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Table of contents
Modules
soprano Classes
All Classes

# Soprano

Soprano is a QT-based pluggable framework for RDF storage and parsing. It tries to provide a highly usable interface to several RDF storage solutions.

## Overview

Soprano centers around the Soprano::Model class which represents one storage set. A Soprano::Model is basically a set of RDF quadruples, i.e. Soprano::Statement. The actual storage is done via Soprano::Backend plugins. All query operations return Soprano::Iterator instances. Iterator is a explicitely shared class which is very easy to understand and use.

Soprano makes the distinction between two types of Models: Soprano::StorageModel and Soprano::FilterModel. The former one is intended to be the basic Model which actually stores the data while the latter ones can be stacked on top of a Soprano::StorageModel to perform certain filter operations. Thes filter operations can range from very basic things such as disallowing any write operation (Soprano::Util::ReadOnlyModel) to more complex things such as full text indexing of all literal statements (Soprano::Index::IndexFilterModel) or exporting the Model via D-Bus (Soprano::Server::DBusExportModel).

Apart from storage Soprano provides a system for RDF parser and serializer plugins. For more details on parsing or serializing RDF data see the Soprano::Parser and Soprano::Serializer classes.