XML ja WSDL

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XML ja WSDL

• Enn Õunapuu
• Tallinn University of Technology
• enn_at_cc.ttu.ee
• 372 050 97720

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Sisu

• XML standard
• XML documents
• XML DOM
• XML document views. CSS,XSL
• WSDL

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Global Virtual Marketplace

• The Global Virtual Market is millions of
  consumers, companies and value added services,
  applications for healthcare, design and
  manufacturing, training and education, retailing
  and other key vertical market segments. As with
  the Internet itself, the virtual marketplace is
  the collective product of many individuals and
  organizations that cooperate to build it and
  compete on the products and services sold in it.
  The result is an entrepreneurial explosion of
  applications and services, building on and adding
  value to each other.

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XML

• WWW.w3.org based standard.
• Fixes the structure of XML document
• Repository the definitions of documents
• ebXML, RosettaNet, Biztalk

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Mis on XML?

• XML is the Extensible Markup Language. It is
  designed to improve the functionality of the Web
  by providing more flexible and adaptable
  information identification.
• It is called extensible because it is not a fixed
  format like HTML (a single, predefined markup
  language). Instead, XML is actually a
  metalanguage' a language for describing other
  languageswhich lets you design your own
  customized markup languages for limitless
  different types of documents. XML can do this
  because it's written in SGML, the international
  standard metalanguage for text markup systems
  (ISO 8879).

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XML example

• HTML text
• Te võiksite vaadata Mark Wilson raamatut XML and
  the Internet for Visual Basic 6 Manningsi
  kodulehel. Vaadake autori publikatsioonide
  jaotist author online section. Et saada kontakti
  teiste Visual Basic huvilistega minge
  http//www.vbxml.com
• XML text
• ltreview subject-type"book"gt Te võiksite vaadata
  ltAUTHORgtMark Wilsonlt/AUTHORgt raamatut
  ltBOOK_NAMEgtXML and the Internet for Visual Basic
  6lt/BOOK_NAMEgt ltPUBLISHERgtManningsilt/PUBLISHERgt
  kodulehel. Vaadake autori publikatsioonide
  jaotist ltLINK_AREAgt author online
  sectionlt/LINK_AREAgt. Et saada kontakti teiste
  ltUSER_TOPICgtVisual Basic lt/USER_TOPICgt
  huvilistegaltBOOK_TOPICgtXMLlt/BOOK_TOPICgt , minge
  ltURLgthttp//www.vbxml.comlt/URLgt lt/review
  subject-type"book"gt.

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DTD
XML Schema
XML Data Types
XML
XSL
CSS
Application
XPL
XLL
HTML
XML
Resources
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Xml ülevaade
www.w3.org/xml SGML näide ltEMailgt ltsendergt
ltpersongt ltfirstnamegt Karen
lt/firstnamegt ltlastnamegt Lemone
lt/lastnamegt lt/persongt ltreceivergt
ltpersongt ltdistributionListgt
cs525_at_cs lt/distributionListgt lt/persongt
lt/receivergt ltcontentsgt Don't you
agree this is really ugly? lt/contentsgt lt/EMailgt
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DTD
lt!ELEMENT note (to,from,heading,body)gt lt!ELEMENT
to (PCDATA)gt lt!ELEMENT from (PCDATA)gt
lt!ELEMENT heading (PCDATA)gt lt!ELEMENT body
(PCDATA)gt
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XML SCHEMA

• defines elements that can appear in a document
• defines attributes that can appear in a document
• defines which elements are child elements
• defines the order of child elements
• defines the number of child elements
• defines whether an element is empty or can
  include text
• defines data types for elements and attributes
• defines default and fixed values for elements and
  attributes

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XML SCHEMA vs DTD

• XML Schemas are extensible to future additions
• XML Schemas are richer and more useful than DTDs
• XML Schemas are written in XML
• XML Schemas support data types
• XML Schemas support namespaces

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XML schema elements

• An XML Schema
• defines elements that can appear in a document
• defines attributes that can appear in a document
• defines which elements are child elements
• defines the order of child elements
• defines the number of child elements
• defines whether an element is empty or can
  include text
• defines data types for elements and attributes
• defines default and fixed values for elements and
  attributes

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Well-formed xml document

• A well-formed XML document is a document that
  conforms to the XML syntax rules
• must begin with the XML declaration
• must have one unique root element
• all start tags must match end-tags
• XML tags are case sensitive
• all elements must be closed
• all elements must be properly nested
• all attribute values must be quoted
• XML entities must be used for special characters

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Simple XML schema

• lt?xml version"1.0"?gt ltxsschema
  xmlnsxs"http//www.w3.org/2001/XMLSchema"
  targetNamespace"http//www.w3schools.com"
  xmlns"http//www.w3schools.com"
  elementFormDefault"qualified"gt
• ltxselement name"note"gt
• ltxscomplexTypegt
• ltxssequencegt
• ltxselement name"to" type"xsstring"/gt
• ltxselement name"from"
  type"xsstring"/gt
• ltxselement name"heading"
  type"xsstring"/gt
• ltxselement name"body"
  type"xsstring"/gt
• lt/xssequencegt
• lt/xscomplexTypegt
• lt/xselementgt
• lt/xsschemagt

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A Reference to an XML Schema

• lt?xml version"1.0"?gtltnote xmlns"http//www.w3sch
  ools.com" xmlnsxsi"http//www.w3.org/2001/XMLSch
  ema-instance" xsischemaLocation"http//www.w3sch
  ools.com note.xsd"gt
• lttogtTovelt/togt
• ltfromgtJanilt/fromgt
• ltheadinggtReminderlt/headinggt
• ltbodygtDon't forget me this weekend!lt/bodygt
• lt/notegt

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Schema

• lt?xml version"1.0"?gt
• ltxsschema xmlnsxs"http//www.w3.org/2001/XMLS
  chema" targetNamespace"http//www.w3schools.com"
  xmlns"http//www.w3schools.com"
  elementFormDefault"qualified"gt
• ... ...
• lt/xsschemagt

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Simple element

• ltxselement name"xxx" type"yyy"/gt
• Example
• ltxselement name"lastname" type"xsstring"/gt
• ltxselement name"age" type"xsinteger"/gt
• ltxselement name"dateborn" type"xsdate"/gt

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Common XML Schema Data Types

• xsstring
• xsdecimal
• xsinteger
• xsboolean
• xsdate
• xstime
• ltxselement name"color" type"xsstring"
  default"red"/gt

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How to Define an Attribute

• ltxsattribute name"xxx" type"yyy"/gt
• ltxsattribute name"lang" type"xsstring"
  default"EN"/gt
• ltxsattribute name"lang" type"xsstring"
  use"optional"/gt
• ltxsattribute name"lang" type"xsstring"
  use"required"/gt

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Restrictions on Values

• ltxselement name"car"gt
• ltxssimpleTypegt
• ltxsrestriction base"xsstring"gt
  ltxsenumeration value"Audi"/gt ltxsenumeration
  value"Golf"/gt ltxsenumeration value"BMW"/gt
  lt/xsrestrictiongt
• lt/xssimpleTypegt
• lt/xselementgt

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Complex Element

• A complex element is an XML element that contains
  other elements and/or attributes.
• There are four kinds of complex elements
• empty elements
• elements that contain only other elements
• elements that contain only text
• elements that contain both other elements and
  text
• Note Each of these elements may contain
  attributes as well!

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Complex element example

• ltxselement name"employee"gt ltxscomplexTypegt
• ltxssequencegt
• ltxselement name"firstname"
  type"xsstring"/gt
• ltxselement name"lastname"
  type"xsstring"/gt
• lt/xssequencegt
• lt/xscomplexTypegt
• lt/xselementgt

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Cardinality

• ltxselement name"person"gt
• ltxscomplexTypegt
• ltxssequencegt
• ltxselement name"full_name"
  type"xsstring"/gt ltxselement name"child_name"
  type"xsstring" maxOccurs"10" minOccurs"0"/gt
• lt/xssequencegt
• lt/xscomplexTypegt
• lt/xselementgt

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Attribute groups

• ltxsattributeGroup name"personattrgroup"gt
  ltxsattribute name"firstname" type"xsstring"/gt
  ltxsattribute name"lastname" type"xsstring"/gt
  ltxsattribute name"birthday" type"xsdate"/gt
  lt/xsattributeGroupgt
• ltxselement name"person"gt
• ltxscomplexTypegt
• ltxsattributeGroup ref"personattrgroup"/gt
  lt/xscomplexTypegt
• lt/xselementgt

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XML Schema example

• http//www.w3.org/TR/2001/REC-xmlschema-0-20010502
  /po.xml

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DOM
The Document Object Model is a platform- and
language-neutral interface that will allow
programs and scripts to dynamically access and
update the content, structure and style of
documents. The document can be further processed
and the results of that processing can be
incorporated back into the presented page. This
is an overview of DOM-related materials here at
W3C and around the web.
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XPATH
lt?xml version"1.0" encoding"ISO-8859-1"?gt
ltcataloggt ltcd country"USA"gt lttitlegtEmpire
Burlesquelt/titlegt ltartistgtBob Dylanlt/artistgt
ltpricegt10.90lt/pricegt lt/cdgt ltcd country"UK"gt
lttitlegtHide your heartlt/titlegt ltartistgtBonnie
Tylerlt/artistgt ltpricegt9.90lt/pricegt lt/cdgt ltcd
country"USA"gt lttitlegtGreatest Hitslt/titlegt
ltartistgtDolly Partonlt/artistgt ltpricegt9.90lt/pricegt
lt/cdgt lt/cataloggt /catalog /catalog/cdpricegt10.80

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Web Services
Java ja ASP SOAP Web rakendus
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SOAP Request Näide
ltSOAP-Envelope xmlnsSOAP-ENVhttp//schemas.xmlso
ap.org/soap/envelopegt ltSOAP-Bodygt ltmGetAddress
xmlnsmhttp//example.org/GetAddressgt
ltparametersgt
ltparam0gtStevelt/param0gt
ltparam1gtWattlt/param1gt lt/parametersgt
lt/mGetAddressgt lt/SOAP-Bodygt lt/SOAP-Envelopegt
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The SOAP Response Example
ltSOAP-Envelope xmlnsSOAP-ENVhttp//schemas.xmlso
ap.org/soap/envelopegt ltSOAP-Bodygt
ltmGetAddress xmlnsmhttp//example.org/GetAddres
sgt ltresultsgt
ltresult0gt12th Floor, Ali Reza Towers, Medinah Rd,
Jeddah, KSA lt/result0gt
lt/resultsgt lt/mGetAddressgt lt/SOAP-Bodygt lt/
SOAP-Envelopegt
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WSDL

• Abstract Definitions
• TypesMachine- and language-independent type
  definitions.
• MessagesContains function parameters (inputs
  separate from outputs) or document descriptions.
• PortTypesRefers to message definitions in
  Messages section to describe function signatures
  (operation name, input parameters, output
  pameters).
• Concrete Descriptions
• Bindings Specifies binding(s) of each operation
  in the PortTypes section.
• Services Specifies port address(es) of each
  binding.

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Message

• ltmessage namequoteRequestgt
• ltpart namebody elementquote-schema-nssto
  ckName/gt
• lt/messagegt
• ltmessage namequoteResponsegt
• ltpart namebody elementquote-schema-nssto
  ckPrice/gt
• lt/messagegt

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Porttype

• ltportType namequotePortTypegt
• ltoperation namegetQuotegt
• ltinput messagequote-wsdl-nsquoteReques
  t/gt
• ltoutput messagequote-wsdl-nsquoteResponse/gt
• lt/operationgt lt/portTypegt

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Binding

• ltbinding namequoteBinding typequote-wsdl-nsq
  uotePortTypegt
• ltoperation namegetQuotegt
• ltsoapoperation soapAction"http//example.
  com/stockQuoteAction"/gt ltinputgt
• ltsoapbody partbody useliteral/gt
• lt/inputgt
• ltoutputgt
• ltsoapbody partbody useliteral/gt
• lt/outputgt
• lt/operationgt
• lt/bindinggt

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Service

• ltservice namestockServicegt
• ltport namestockPort bindingquote-wsdl-ns
  quoteBindinggt ltsoapaddress
  locationhttp//example.com/quotes/'/gt lt/portgt
• lt/servicegt

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Questions?