Introduction to UDDI

1
Session 4

• Introduction to UDDI

2
Review of Session 3 (1 of 2)

• XML can be used with HTTP for communication
  amongst applications working on different
  platforms, giving a solution to the
  interoperability problem.
• SOAP is an XML-based protocol, which allows
  components, and applications to communicate using
  HTTP.
• A SOAP message consists of a mandatory SOAP
  envelope, a mandatory SOAP body and an optional
  SOAP header.

3
Review of Session 3 (2 of 2)

• The namespace identifier for the attributes and
  elements defined in a SOAP envelope is
  http//schemas.xmlsoap.org/envelope/.
• Remote garbage collection is not supported by
  SOAP.
• The SOAP Fault element is used to transport error
  or status information or both, within a SOAP
  message.
• The first new layer added by SOAP is the
  element-normal-form encoding style described SOAP
  specification.

4
Objectives

• Define UDDI
• Recognize the need for UDDI
• Search the UDDI registries
• Describe the data structure model used in UDDI
• Discuss the fields present in the data structures

5
Registering and Using Web Services
Available services
Need for services
Search
Register
UDDI
6
UDDI
UDDI
Register
Search
Services
Need Services

• Stands for Universal Description, Discovery and
  Integration
• Helps businesses to

Describe the business and the services offered by
them
Discover other businesses, which may be of some
assistance
Integrate with other businesses for expansion
7
UDDI Business Registry

Aims at integrating e-commerce sites
Markets Search Engines
Industries
UDDI Business Registry (UBR)
Business
Register / Search
8
Working of UDDI
XML File
Submitted to
UDDI
Green Pages
White Pages
Yellow Pages
Technical information about the services
Includes address, contact etc.
Industrial Category information
9
UDDI Business Registry (UBR)
Registrar
UBR
??? Future Nodes ???
Existing Nodes
Replicated daily
Register Directly
10
Finding a Web Service (1)

• Go to the site http//www.uddi.org

Click
Choose a node
11
Finding a Web Service (2)

• Fill the search criteria

12
Registry Architecture and Data Structures
publisherAssertion (pA)
bindingTemplate (bT)
businessEntity (bE)
businessService (bS)
bE
pA
bE
pA
bS
bS
bS
bT
bT
tModel
tModel
13
businessEntity

• Contains information about the party that
  publishes descriptive information and the
  services it offers.

14
businessService

• Structure represents a logical service
  classification
• Contains a business description of the service,
  a list of categories that describe the service,
  and a list of pointers to references and
  information related to the service.

15
bindingTemplates

• Provides the technical descriptions about the
  Web service
• Each bindingTemplate has a single parent
  businessService structure.

16
tModel Structure

• Represents technical information about those
  data structures, which are used as references by
  instances of business entity.
• Illustrates the manner in which the Web service
  could be interacted.

17
publisherAssertion

• publisherAssertion data structures bear
  references to business entities

18
Web Services and UDDI
UDDI A service on the Web that helps locate a
Web service
Search
UDDI
Client needs a Web service
Find
A collection of Web Services
19
Summary (1 of 2)

• The data provided during a registration with UDDI
  can be classified into white pages containing
  general information about the business entity,
  yellow pages that categorize the Web Service, and
  the green pages consisting of technical
  information about the services.
• Companies hosting the UBR are known as node
  operators.
• A company, which does registration for another
  company / business on its behalf, is known as a
  registrar.
• Access to and from UBR is done using SOAP.

20
Summary (2 of 2)

• The data contained in the three pages can be
  further classified into the following core data
  structures
• businessEntity
• businessService
• bindingTemplate
• tModel
• publisherAssertion
• No core data structure has more than one parent
  structure.
• A unique UDDI id (UUID) is given to each core
  data structure.