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1 G52IWS: Universal Description, Discovery and Integration (UDDI) Chris Greenhalgh 2007-11-05
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2 Contents Overview History/standards UDDI data structures and UUIDs –Categorisation Inquiry API and examples –Find methods; get methods WSDL and UDDI Publishing API Limitations
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3 UDDI Overview Realised as UDDI registries Enables businesses providing services to register information to enable their discovery –“white pages” – address, contact & known identifiers –“yellow pages” – industrial categorizations using standard taxonomies –“green pages” – technical information about exposed services Enables web service clients to discover potential services Enables businesses to discover –Potential business partners –Potential services to make use of
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4 UDDI in the Web Service Architecture Service Broker: UDDI registry Service Provider Service Requestor Discover Service: UDDI inquiry API Invoke service Register service: UDDI publishing API Communication: typically SOAP (XML) over HTTP over TCP/IP Optionally secured using WS-Security Interface definition: WSDL (esp. for dynamic invocation) Registry: UDDI & WSDL Manual registry & discovery of businesses & services, e.g. browser-based
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5 History/Standards Started by IBM, Microsoft & Ariba OASIS (Organization for the Advancement of Structured Information Standards) open standard –UDDI version 2 – April 2003 –UDDI version 3 – Feb. 2005 –http://www.oasis-open.org/specs/index.phphttp://www.oasis-open.org/specs/index.php –See also http://uddi.xml.org/ community sitehttp://uddi.xml.org/ See also Java API for XML Registries (JAX-R)
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6 UDDI registries May be –Public – available to anyone –Private – operated for one particular group of participants, often with more security Each is independent by default –different UDDI key namespaces Can be accessed as a web service –possibly among other methods May be physically distributed across multiple nodes –Which logically provide interfaces to the same information (the same registry)
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7 UDDI APIs A UDDI registry node implements one or more UDDI APIs –Inquiry –Publication And for UDDI 3: –Security –Custody transfer –Subscription With client Subscription Listener API –Replication Specified in terms of XML schema types –For use with SOAP document/literal style
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8 UDDI Data Structures (References are tModelInstances)
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9 UUIDs All structures (except publisherAssertion) are identified by 128-bit globally unique identifier also known as UUID. –E.g. uuid:23453aef-af35-6a3f-c34a-bf798dab965a These UUIDs can later be used as keys to access the specific data within the registry.
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10 Primary information about a business –Contact information –Categorization of business in Specific taxonomy or classification scheme(s) –Identifiers –Relationships to other business entities See –Descriptions of the business See Inquiry API section for examples
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11 Used to represent a relationship between s Relationship may be of any kind –E.g. partners, business-to-customer Must be asserted by BOTH business entities through their own s before the relationship is visible –So that a business cannot unilaterally claim a relationship that does not actually exist
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12 Represents a service of a business –Web service, telephone service, etc. etc. Abstract representation Contained by a Can be referenced by other s
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13 Contained by a Describes the service in terms of –Pointers to technical descriptions i.e. s –Access URLs E.g. SOAP endpoint URLs
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14 Identifies/describes a service specification or behaviour Typically contains a link to the service specification –Does not actually contain the specification –E.g. a link to a WSDL document or textual specification
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15 Additional data structures –for or –E.g. D-U-N-S numbers (9 digit business identifier), tax IDs –for, or –Categorisation in some system/taxonomy (see next slides) Support enquiry
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16 Categorization in UDDI registries (aka “classification”) Esp. useful for searching/discovery Extensible framework, including –Standard schemes - see next slide –Arbitrary additional schemes Identified by s Categorisation scheme may be: –“Checked” – checked with categorisation organisation during publishing –“Unchecked” – no checking performed
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17 Standard classification schemes –NAICS (North American Industry Classification System) e.g. 424920=Book, periodical and newspaper merchant wholesalers http://www.census.gov/epcd/www/naics.html –UNSPSC (United Nations Standard Poducts and Services Classification) E.g. 55101523=Exercise books http://www.unspsc.org/ –ISO 3166 geographic coding standard E.g. 826/GBR/GB=United Kingdom, GB-NGM=Nottingham (unitary authority) http://en.wikipedia.org/wiki/ISO_3166
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18 Inquiry API Used to find matching entities: –,,,, Or to get detailed information: –,,,, Specified as XML schema elements
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19 Find_xx Inquiry API functions Support browse, search and narrow Returns abbreviated information –Including UDDI key –Used to then get detailed information
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20 operation Request syntax (UDDI 2.0): – [ ] [ [ ]...] [ ] [ ] [ ] [ ] ‘%’ wildcard, OR See earlier notes, OR Apply to binding as fingerprint, AND
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21 Example request ACM% “Developing Java Web Services”
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22 <SOAP-ENV:Envelope xmlns:SOAP-ENV= "http://schemas.xmlsoap.org/soap/envelope/"> <businessList xmlns="urn:uddi-org:api_v2" generic="2.0" operator="SYSTINET"> <businessInfo businessKey= "uuid:23453aef-af35-6a3f-c34a- bf798dab965a"> ACME Computer Services Provides professional services in the areas of computer software (cont.) Example response “Developing Java Web Services” listing 5.4 One business
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23 <serviceInfo serviceKey= "uuid:1245sdef-af35-6a3f-c34a- bf798dab965a" businessKey="uuid:523f3aef- af35-6a3f-c34a-bf798dab965a"> Billing Services One service
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24 element List of enumeration, e.g. – caseSensitiveMatch –Includes: exactNameMatch, caseSensitiveMatch, sortByNameAsc, sortByNameDesc, sortByDateAsc (default), sortByDateDesc
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25 operation Return UUIDs of related businesses (!) –Given a reference businessKey (UUID) –Optional findQualifiers –Optional keyedReferences
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26 operation Request syntax (UDDI 2.0): – [ ] [ [ ]...] [ ] [ ] The business: required “Fingerprint”
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27 Example response “Developing Java Web Services” Billing Services
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28 operation Syntax: – [ ] [ ] “Fingerprint” The service: required
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29 Example Response “Developing Java Web Services” http://www.acmecomputerservices.com/billingservices_entry/ Provides SOAP Interface. Described by BillingServices_WSDL.wsdl. endpoint tModel summary
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30 operation Request syntax: – [ ] [ ] [ ] [ ]
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31 Example Response “Developing Java Web Services” SOAP_WSDL_BillingServices
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32 Get_xx inquiry API functions Support drill-down –Typically getting more information for specific entities –Takes UUID as key Operations: –
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33 operation Example request: – 23453aef-af35-6a3f-c34a-bf798dab965a
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34 Example response “Developing Java Web Services” http://www.systinet.com/wasp/uddi/ discovery?businessKey= 23453aef-af35-6a3f-c34a-bf798dab965a http://www.systinet.com/wasp/uddi/ ACME Computer Services Provides professional services in the areas of computer software
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35 For sales related information Joe Smith 1, Computer Drive, Burlington, MA 01803 USA... See next slide
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36 Billing Services Billing Services... See next slide NAICS classification ISO 3166 classification
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37 Here is where you should be visiting to get started with using billing services provided by us. http://www.acmecomputerservices.com/ billingservices_entry/... See next slide Service endpoint
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38 Provides SOAP Interface. Described by BillingServices_WSDL.wsdl. Describes how to use this service http://www.acmecomputerservices.com/billing_ services_description/ Optional instance (use)-specific information. Can also have parameters
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39 Has: –name –description (optional) –overviewDoc (optional) Including overviewURL, e.g. WSDL ref –identifierBag (optional) – name-value pairs –categoryBag (optional) – taxonomy-specific name-value pairs
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40 WSDL and UDDI See e.g. http://www.oasis- open.org/committees/uddi- spec/doc/tn/uddi-spec-tc-tn-wsdl-v2.htm tModels identify –WSDL portType –WSDL Binding businessService represents WSDL service bindingTemplate represents WSDL port
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42 Publisher API User to publish/change/delete the information in a UDDI registry –,,,,,,, To manage relationship assertions –, - get businessEntity & tModels owned by this user
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43 Publisher API Security All operations require authentication: – - takes username/password, return for subsequent use – - releases/invalidates
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44 Limitations Simple information model –e.g. little/no business oriented information such as business process models –cf. ebXML Registry only, i.e. Stores only metadata –cf. ebXML Registry/repository, also stores submitted objects
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