Primer Overview

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This guide forms the introduction to the set of OWLIM's GraphDB user documentation. OWLIM GraphDB is Ontotext's database system for storing, processing and querying structured data formatted according to the [Resource Description Framework (RDF)|http://www.w3.org/TR/rdf-concepts/]. It is packaged as a Storage and Inference Layer (SAIL) for the [Sesame|http://www.openrdf.org/] RDF framework. If you need a quick overview of OWLIM GraphDB or a download link to its latest releases, please visit OWLIM's GraphDB [product page|http://www.ontotext.com/owlim/index.html].
Among structured data repositories, OWLIM GraphDB is the world leader for its unsurpassed processing capacity, both in terms of volume of data and loading/inference speed on commodity hardware.
This guide provides the reader with a conceptual overview of OWLIM GraphDB -- with some general information about its structure and functioning -- as well as an overview of how to install the system.
In addition, a large part of the document gives a general introduction to semantic concepts and technologies, which provides the inexperienced reader with sufficient background to understand the role of OWLIM and the problems it solves.
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This document is intended for project managers, engineers and systems designers who wish to integrate OWLIM GraphDB in to their applications, but who do not necessarily have a thorough grounding in semantic technologies and concepts. It is also useful for system administrators who need to support and maintain an OWLIM-based GraphDB-based system.

This document presumes that the reader is familiar with databases and is expected to be able to draw from his knowledge of relational databases. The required minimum of Semantic Web concepts and related information is provided in the course of this document.
An understanding of XML would also be beneficial, as it is the most widely used meta-data description language on the Web and for this reason is used as a standard method for illustrating Semantic Web concepts in the reference literature.
The purpose of this document is:
# To deliver a general overview of the OWLIM GraphDB system and to acquaint the reader with its architecture and operational logic
# To introduce the Semantic Web and its concepts and to provide enough information to begin using OWLIM GraphDB in practical applications

The [background knowledge|OWLIMv40:Primer Background Knowledge] section gives a brief conceptual description of the Semantic Web. There is a great deal of information about the Semantic Web available both over the Internet and in print, therefore the topics in this section serve to highlight the required knowledge rather than to cover them in great depth. However, ample references are provided for every topic.
The [introduction to OWLIM|OWLIMv40:Primer GraphDB|OWLIMv40:Primer Introduction to OWLIM] section deals with OWLIM GraphDB itself and provides introductory information that forms a basis for the more detailed information given in the User Guide for the particular OWLIM GraphDB edition.

h1. How to Use This Document

The [background knowledge|OWLIMv40:Primer Background Knowledge] section is optional depending on the reader's familiarity with Semantic Web concepts. For readers unfamiliar with this subject, it is recommended to read this entire section first and preferably check as many of the references as time permits. Readers who have some understanding, should read this section selectively, skipping over content that is already familiar. Experts in this field can skip the entire section.
The [introduction to OWLIM|OWLIMv40:Primer GraphDB|OWLIMv40:Primer Introduction to OWLIM] is essential reading and should be read sequentially from beginning to end without skipping any topics. This knowledge is required before using OWLIM. GraphDB.

h1. Conventions
h1. Credits and Licensing

OWLIM GraphDB uses Sesame as a library, taking advantage of its APIs for storage and querying, as well as the support for a wide variety of query languages (e.g. SPARQL and SeRQL) and RDF syntaxes (e.g. RDF/XML, N3, Turtle).
The development of OWLIM GraphDB is partly supported by [SEKT|http://www.sekt-project.com/], [TAO|http://www.tao-project.eu], [TripCom|http://www.tripcom.org/], [LarKC|http://www.larkc.eu/], and other [FP6|http://cordis.europa.eu/fp6/] and [FP7|http://cordis.europa.eu/fp7/] European research [projects|http://www.ontotext.com/research/].
This document and the products discussed in it are copyrighted and subject to licensing as follows:
* *OWLIM-Lite, *GraphDB-Lite, © Copyright Ontotext AD.* 135 Tsarigradsko Shosse, Sofia 1784, Bulgaria, [http://www.ontotext.com].
* *OWLIM-SE, *GraphDB-SE, © Copyright Ontotext AD.* 135 Tsarigradsko Shosse, Sofia 1784, Bulgaria, [http://www.ontotext.com].
* *OWLIM-Enterprise, *GraphDB-Enterprise, © Copyright Ontotext AD.* 135 Tsarigradsko Shosse, Sofia 1784, Bulgaria, [http://www.ontotext.com].
* *Sesame, © Copyright Aduna b.v*. Stadsring 181, 3817 BA Amersfoort, The Netherlands Sesame is an open-source library, available under the GNU Lesser GPL ([http://www.gnu.org/copyleft/lesser.html])
* All other trademarks mentioned in this document, belong to their respective owners.