Release 10.1A: OpenEdge Getting Started:
OpenEdge Reference Architecture

Preface

This Preface contains the following sections:

Purpose
Audience
Organization
Typographical conventions

Purpose

This manual is intended as a starting point for readers who want information about the OpenEdge® Reference Architecture (RA). It gives a high-level view of the components of the OpenEdge RA and how they work together. However, if you are looking for more detail and examples, see the white papers at:

http://psdn.progress.com/library/product_info/oera/index.ssp.

Also, Progress® Education Services offers training on the OpenEdge RA in a variety of formats. For more information, go to:

http://www.progress.com/services/education/na_education/curriculum_maps/
openedge_reference_architecture/index.ssp

Audience

This manual is intended for experienced Progress application architects and developers who want to understand and evaluate the OpenEdge RA model for application development.

Organization

Chapter 1 "Introducing the OpenEdge Reference Architecture"

Provides an overview of the OpenEdge Reference Architecture (RA).

Chapter 2 "Data Access Layer"

Describes the components of the Data Access Layer.

Chapter 3 "Business Servicing Layer"

Presents the components of the Business Servicing Layer.

Chapter 4 "Presentation Layer"

Lists the components of the Presentation Layer

Chapter 5 "Integration Layer"

Reviews the components of the Integration Layer.

Typographical conventions

This manual uses the following typographical conventions:

Convention	Description
Bold	Bold typeface indicates commands or characters the user types, provides emphasis, or the names of user interface elements.
Italic	Italic typeface indicates the title of a document, or signifies new terms.
SMALL, BOLD CAPITAL LETTERS	Small, bold capital letters indicate OpenEdge® key functions and generic keyboard keys; for example, GET and CTRL.
KEY1+KEY2	A plus sign between key names indicates a simultaneous key sequence: you press and hold down the first key while pressing the second key. For example, CTRL+X.
KEY1 KEY2	A space between key names indicates a sequential key sequence: you press and release the first key, then press another key. For example, ESCAPE H.
Syntax:
Fixed width	A fixed-width font is used in syntax statements, code examples, system output, and filenames.
Fixed-width italics	Fixed-width italics indicate variables in syntax statements.
Fixed-width bold	Fixed-width bold indicates variables with special emphasis.
UPPERCASE fixed width	Uppercase words are Progress® 4GL language keywords. Although these are always shown in uppercase, you can type them in either uppercase or lowercase in a procedure.
	This icon (three arrows) introduces a multi-step procedure.
	This icon (one arrow) introduces a single-step procedure.