OpenTravel Model-Driven Schema at IATA

The Model-Driven Standard
Advantage
The OpenTravel
Interoperability Framework
Open “Model” Standards for the Travel Industry

19th Meeting of the IATA XML Working
Group (XMLWG/19)
Montreal
17-20 September 2012

Agenda
• About OpenTravel
• Why Model Driven?
• MDA Overview & Building Blocks
• Enterprise Versus OpenTravel Models
• Open-Model “Open” Standards for the Travel Industry
• The OpenTravel Interoperability Framework
• Introduction & Benefits
• Framework Components “At a Glance”
• Framework Components “Under the Hood”
• Information Model
• Capability Model
• Component Model
• Q&A

© 2012 OpenTravel Alliance | www.opentravel.org

About
OpenTravel

The OpenTravel Alliance provides a community where
companies in the electronic distribution supply chain work
together to create an accepted structure for electronic messages,
enabling suppliers and distributors to speak the same
interoperability language, trading partner to trading partner.


Since…

1999
OpenTravel has been a
member funded not-for-profit
organization.

Since…

2001
OpenTravel has been
producing open standards for
the travel industry.


Since…

2011
OpenTravel has been re-architecting its open
standard to support modern messaging
environments…

…and implementing a
model driven architecture
to streamline internal standards development and
support implementer enterprise software development.


Why
Model Driven?
Model driven standards naturally support system evolution.


Model Driven Architecture (MDA) » Overview

MDA is a framework for software development
• Defined by the Object Management Group (OMG)
• MDA places importance on models in the software development process
• The software development process is driven by the activity of modeling
your software system

Key Benefits for Enterprise Key Benefits for OpenTravel

Productivity Productivity
Model Driven Architecture

Portability Domain Modeling

Interoperability Schema Quality


Model Driven Architecture (MDA) » Building Blocks

It’s mostly about the model…

Model Model Language
Description of a system. A model is written in a
well-defined language.
PIM (independent) UML
OCL
PSM (specific) (Object Constraint
Language )

PIM to Code
Meta Object Facility PSM to Code

(MOF) Specific source
Source to target language. model.
Transformation Transformation
Definition Tool

…but transformations are important too!


Model Driven Architecture (MDA) » Typical Enterprise Models

Typical Enterprise-Level Model Structure


Model Driven Architecture (MDA) » OpenTravel Models

OpenTravel Model Structure

Typical Enterprise Models


Model Driven Architecture (MDA) » Open Model Standards for the Travel Industry

The “Open Model Principle”
OpenTravel’s core competency is an open standard common information exchange model
that supports travel industry business requirements and innovation.

• Paradigm shift to “neutral” industry standards for the travel
industry
– Platform/ tooling neutral
– Architectural style neutral

• Emphasis on common information exchange modeling
• Collection of UML models
– Support business functionality
• Easy mapping to internal business processes
– Support the pace of travel industry innovation

• Enhancements made at the model level
• Model publishing not labor intensive
• Collection of UML models
– Support business functionality
– Industry adopted transformation included (XML)
– Other open source transformations
• JAVA, JSON, .NET


OpenTravel
Interoperability Framework
A broad component model for the entire travel industry ecosystem.


OpenTravel Interoperability Framework (OTIF) » Introduction

The OTIF Framework uses a
model driven architecture (MDA)
to better serve OpenTravel members, schema implementers
and the travel industry as a whole.

• Provides “open” common
representational models of
F ramework

all data and business
functionality contained in
OpenTravel specifications
Interoperability

• Streamlines OpenTravel
standards development
Open Travel


OpenTravel Interoperability Framework (OTIF) » Key Benefits

Key benefits for OpenTravel, OpenTravel member companies and
specification implementers include:

• Reduced schema enhancement time
• Schema enhancements at the model level produce final
publication
• Reduced implementation time & cost
• UML-based models integrate with enterprise level
F ramework

development platforms
• Canonical information model for context and
correlations allows IT, business and trading partners to
speak the same language
• Increased schema quality
Interoperability

• Interoperable framework components ensure optimum
reuse and reduce redundancy
• Improved schema governance
• Best practices and policies integrated at the tooling
level
• Reference XML transformation
Open Travel


Framework Components
At a Glance
Continuous XML component model refinement.


OTIF Key Framework Key Components

Four key framework components interoperate for continuous
XML component model refinement.
F ramework
Interoperability
Open Travel


Key Components » Canonical Model

OpenTravel Lexis Canonical Model

A SQL Server-based canonical refactoring of OpenTravel’s Common
Information Exchange Model (CIEM).

NORMALIZED TERMS

211
CONTEXTUAL FACETS

1067

<<InformationModel>>

Key Components » UML and Data Models

Travel industry UML capability models.
Provides implementers with UML support at the business and technical level
for XML Object Suite component & service composition models that map to
business processes.

UML MODELS

273


Key Components » OpenTravel Library Builder

Automated XML publication packages.
XML compiler that builds and enforces versioning for model XML
transformation with type and service libraries.

46
BUSINESS OBJECTS

1
2
3

77
CORE OBJECTS


Key Components » Solution Builder

Reference solutions for implementers.
A compendium of (best practice-based) reference solutions that make
working with OpenTravel schema products more productive.

XML Cookbooks
Schema
Dictionaries
Data Model
UML Models
Travel Glossary
Implementation
Matrix
OpenTravel Forum


Framework Components
Under the Hood
Tooling, models and products.


Interoperability Framework Specification Model

Three views of the Framework: Models, Tooling & Integration, Products


Under the Hood…
Information Model
A common representational model of all data and data relationships contained in OpenTravel specifications.


Key Components » Information Model » Canonical Modeler

• Provides a common
business vocabulary
used in XML
components, best
practices and terms
glossary
• Leverages other
industry standards
(IATA, ISO, etc.)
F ramework

• Provides correlations
for concepts that span
multiple travel
Interoperability

industry sectors
• Produces logical
entity-relationship
model for
implementer
database mapping
Used internally by OpenTravel
Open Travel

Licensed from igniteXML


Key Components » Information Model » Canonical Modeler

EXAMPLE:
This example shows
how the concept of a
“price” in the canonical
model relates to schema
F ramework

capabilities:
• Air fare and tax
• Rental Car rate, charge
Interoperability

and fee
• Hotel rate, charge and
rate plan
Open Travel


Under the Hood…
Capability Model
UML catalog of OpenTravel schema functionality.


Key Components » Capability Model » UML Modeler

• State of the art UML
Modeler
– Integrated with
Canonical Modeler and
OpenTravel Model
Builder
– Capability stereotype
imported from Canonical
F ramework

Model
– Component model
exported to Model
Builder
Interoperability

• Models included with
publication in two
formats
– XMI
Altova UModel used internally by OpenTravel
– UML Licensed from Altova
Open Travel

(http://www.altova.com/umodel.html)


Key Components » Capability Model » UML Modeler

• Supported UML
element constructs
• Stereotype
• Tagged Values
• Model
• Package
• Class
• Property
• Enumeration

• Supported UML
F ramework

diagrams
• Class
• Package
• Profile
Interoperability

• Sequence
• Use Case
• Multiple views of
capabilities
• Type Library
• Catalog (concept-
based)
Open Travel


Key Components » Capability Model » UML Modeler Custom Features

Stereotype (ota2:) profiles applied at model, package, class and
property level…
F ramework
Interoperability

…enforce the OpenTravel common information exchange model
Open Travel

during transformation.


Key Components » Capability Model » Custom Features

Tagged values assigned at stereotype level for XML component and type
library classification…
F ramework
Interoperability
Open Travel

…enforce transformation to OpenTravel XML Object Suite OTM model.


Key Components » Capability Model » Custom Features

OpenTravel-built Eclipse class library to transform between model
XMI output and custom Model Builder OTM format.
F ramework
Interoperability
Open Travel


Under the Hood…
XML Component Model
Light-weight and extensible XML object and service model with a companion compiler.


OpenTravel XML Object Suite Component Library

A View from the Top
A hierarchy of xml objects comprise the
XML Object Suite component library


Component Library: Simple/ Atomic Type

The most granular building block in the XML
Object Suite.

ota2: Model
Stereotype Icon


Component Library: Enumeration

An Enumeration complexType with a simpleType base
list of enumerated literals.

ota2: Model
Stereotype Icons


Component Library: Value With Attributes

Groups of attributes related to a single base value that
may be a simpleType or complexType open
enumeration.

ota2: Model
Stereotype Icon


Component Library: Core Object

A complexType that serves as a container for
application data that defines common representations
of real world objects.

ota2: Model
Stereotype Icon


Component Library: Business Object

A complexType that is a containers for application data
(such as an itinerary or a traveler profile) that is
commonly query-able and exists as a standalone
object.

ota2: Model
Stereotype Icon


Component Library: Service

A collection of 2.0 components that support interoperable
machine-to-machine interaction over a network specified in
Web Services Description Language (WSDL) format.

ota2: Model
Stereotype Icon


Component Model » OpenTravel Library Builder

Compiler that transforms the OpenTravel model into XML Object
Suite type libraries (XSD) and service libraries (WSDL)

Compiler fundamentals

• Interchange format for
service information
models
F ramework

• Defines 2.0 XML Object
Suite types and schemas
• Compiles into XML
schema (xsd) and WSDL
Interoperability

Library Builder used internally by
OpenTravel
Licensed from third-party
Customized for OpenTravel
Open Travel


Component Model » OpenTravel Library Builder

Includes repository capability to collaborate, manage, and
distribute OTM XML models.

Repository Benefits
• Sharing models within or across organizations
• Lifecycle and version control of published models
F ramework

• Configurable security and access controls for
managed namespaces within a repository
Interoperability

• Browsing and free-text searches of repository content
• May be integrated with WSO2 (open source)
Governance Repository
Open Travel


Component Model » Library Builder » Tooling Overview

Tooling OTA2 is OpenTravel’s new XML
• Component development GUI guidelines and messages
and an OTM model to XSD OTM is the model
compiler (Eclipse Java) transformation for creating
OTA2 XML schemas
F ramework
Interoperability
Open Travel


Component Model » Library Builder » OTM Model Basics

• Model metadata
– Version
– Status
– Namespace
– Library name
– Imports and includes
– Application context
F ramework

• Supported model component
types
Interoperability

– Simple Types
• Simple
• Closed Enumeration
– Complex
• Open Enumeration
• Value With Attributes
• Core Object
• Business Object
Open Travel

– Service


Component Model » Library Builder » OTM Library Document

Model OTM File XSD Schema

<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
<Library <xsd:schema attributeFormDefault="unqualified"
xmlns=http://www.opentravel.org/ns/OTA2/LibraryM elementFormDefault="qualified"
odel_v01_01 targetNamespace=http://opentravel.org/OTA2/pro
xmlns:xsd=http://www.w3.org/2001/XMLSchema file/v01 version="1.0.0"
xmlns:xsi=http://www.w3.org/2001/XMLSchema- xmlns:ota=http://www.opentravel.org/ns/OTA2/co
instance mmon_v01_00
xsi:schemaLocation="http://www.opentravel.org/ns xmlns:otm=http://www.opentravel.org/ns/OTA2/Ap
/OTA2/LibraryModel_v01_01 pInfo_v01_00
OTA2_LibraryModel_v1.4.4.xsd">
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
F ramework

<xsd:annotation>
<VersionScheme>OTA2</VersionScheme>
<xsd:appinfo>
<Status>Draft</Status>
<otm:Library>
<Namespace>http://opentravel.org/profile/v01_01< <otm:LibraryName>OTA2_Profile
/Namespace> </otm:LibraryName>
Interoperability

<Prefix>OTA2</Prefix> <otm:LibraryVersion>1.0.0
<Name>OTA2_Profile_v1.0.0</Name> </otm:LibraryVersion>
<Import prefix="xsd" <otm:SourceFile>/Profile.otm
namespace="http://www.w3.org/2001/XMLSchema"/> </otm:SourceFile>
<otm:CompilerVersion>2.2
<Context </otm:CompilerVersion>
applicationContext="http://www.opentravel.org/OT <otm:CompileDate>2012-09-
M2" context="OTM2"/> 09T12:23:50.339-05:00</otm:CompileDate>
. . . </otm:Library>
Open Travel

. . .


Questions?
Bonnie Lowell
Specification Architect
OpenTravel Alliance

bonnie.lowell@opentravel.org

OpenTravel Interoperability Framework

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OpenTravel Model-Driven Schema at IATA

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