DISCO/UDDI

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DISCO/UDDI

• -Ketan Reddy Peddabachi

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Agenda

• Web Service
• Disco
• UDDI
• Disco Vs UDDI

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Web Services

• Web Services are an evolving series of standards
  that enable programs on various computers to
  communicate with other programs on similar or
  disparate computers transparently over the
  Internet

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Disco And UDDI

• DISCO- A Microsoft Technology
• UDDI-Propelled by Microsoft, Ariba and IBM

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Disco

• An XML document that contains links to other
  resources that describe the Web Service.
• Disco Document-gt Lists the capabilities of the
  Web Service
• WSDL-gtHow to interact with the Web Service

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• lt?xml version"1.0" encoding"utf-8" ?gt
• -
• ltdiscovery xmlnsxsi"http//www.w3.org/2001/XMLSc
  hema-instance" xmlnsxsd"http//www.w3.org/2001/X
  MLSchema" xmlns"http//schemas.xmlsoap.org/disco/
  "gt
• ltcontractRef ref"http//localhost/ket_webservi
  ce/ket_webservice.asmx?wsdl" docRef"http//localh
  ost/ket_webservice/ket_webservice.asmx"
  xmlns"http//schemas.xmlsoap.org/disco/scl/" /gt
•   ltsoap address"http//localhost/ket_webservice/
  ket_webservice.asmx" xmlnsq1"http//localhost/ke
  t_webservice/" binding"q1ServiceSoap"
  xmlns"http//schemas.xmlsoap.org/disco/soap/" /gt
  
•  lt/discoverygt

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Client Side tools to discover the Disco document

• Command line client utility
• Add Reference

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DISCO Redirects

• ltHTMLgt
• ltHEADgt
• ltlink type'text/xml' rel'alternate'
  hrefwebservice.disco'/gt
• lt/HEADgt
• lt/HTMLgt

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DISCO and Dynamic Discovery

• A .vsdisco should be placed in the root.
• ltdynamicDiscovery xmlns"urnschemas-dynamicdiscov
  erydisco.2000-03-17"gt lt/dynamicDiscoverygt
• Requests for .vsdisco files are handled by
  System.Web.Services.Discovery.DiscoveryRequestHand
  ler.

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UDDI

• Defines an API for interacting with a
  centralized Web Service information repository.
• UDDI is used to register and look up services
  with a central registry
• Service Providers can publish information about
  their business and the services that they offer.

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UDDI

• Analogous to a Telephone Directory
• White Pages- Basic Business info
• Yellow Pages- categories based on standards
• Green Pages- Technical specifications and
  references

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UDDI

• In order for someone to use your service they
  have to know about it
• To allow users to discover a service it is
  published to a registry (UDDI).
• To allow users to interact with a service you
  must publish a description of its interface
  (methods arguments).
• This is done using WSDL

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UDDI VS DISCO

• DISCO makes it possible to discover Web Services
  on a given server
• It doesn't attempt to sort Web Service-related
  information across multiple servers
• UDDI is a repository where one can enquire or
  publish web services

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UDDI VS DISCO -cntd

• UDDI has the advantage that one can publish new
  services even after he has shipped the product.

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References

• http//msdn.microsoft.com/msdnmag/issues/02/02/xml
  /
• http//www.codeproject.com/dotnet/intro2websvc.asp
  

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• THANK YOU ?