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Lecture 2: XML/XSLT Internet Technologies

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XML/XSLT What is XML? What is XSLT? From XML to HTML using XSLT The XSLT processing model An Example from FpML Homework Internet Technologies

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What is XML? XML is an acronym that stands for the eXtensible Markup Language. It is a flexible framework which can be used to create new customized markup languages. It’s a meta-language. XHTML, for example, is one XML markup language with a tag set: <P> <H1> …. XML, on the other hand, does not define any particular set of tags. It allows you to create your own tag set and it allows you to define how the tag set is organized. Internet Technologies

4 What is XML’s primary purpose?
Separating data from presentation: The range of internet capable devices is growing- mobile phones, pagers, TV sets, web browsers, in car computers, may have different presentation requirements. Examples include HTML 5 for browsers, Android’s UI Layout language, and MXML for Flash Players. Transmitting data between applications: The amount of data exchanged between organizations is increasing. SOAP is an XML language. Rest style web services often return XML. Ajax responses are often in XML. Internet Technologies

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Some XML Languages EBXML RSS RDFa Atom WSDL SOAP BPEL XHTML WML Chemical Markup Language OWL VoiceXML RDF XBRL SVG Darwin Information Typing Architecture(DITA) RIF XSLT WS-CDL MXML MathML FpML CDA KML (Keyhole Markup Google Map/Earth) GML XMPP Some for display. Some for data. Some for programming. Be sure to read about each of these. SAML Internet Technologies

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What is XSLT? XSLT stands for eXtensible Style Sheet Language : Transformations XSLT is an XML language for transforming the structure of an XML Document. Plays well with CSS. Internet Technologies

7 What is XSLT’s primary purpose?
With the widespread adoption of XML languages there is a be a need to extract and combine data from one set of XML documents to generate another set of XML documents. XSLT In this presentation we will use XSLT to convert XML documents to HTML. Other XML languages are just as easily processed – An Enterprise Service Bus, for example, makes use of XSLT for message transformation. Internet Technologies

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XML to HTML using XSLT (1) The XML document and the associated XSL style sheet may both be transferred to the browser. (2) The server may apply the style sheet to an XML document and the result may be sent to the client. (3) The transformation may occur before the data is placed on the server. Xalan may be used for (2) or (3). All major browsers for (1). XSLT processors are callable from JavaScript or Java or … Internet Technologies

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XML to HTML using XSLT A bibliography expressed in xml is converted to a bibliography in html Internet Technologies

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bib.xml <?xml version="1.0" ?> <bib> </bib> <book isbn = " "> <title> XSLT Programmer's Reference </title> <author> Michael Kay </author> </book> <paper> <title> GoTo Statement Considered Harmful </title> <author> Edsger Dijkstra</author> </paper> <book isbn = " "> <title> XML and Java Developing Web Application</title> <author> Maruyama </author> <author> Tamura</author> <author> Uramoto </author> </book> Internet Technologies

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bib.xsl <?xml version="1.0"?> <!-- XSL to produce a list of ISBN numbers in HTML --> <xsl:stylesheet xmlns:xsl=" version="1.0"> <xsl:template match = "/"> </xsl:template> <html> <title>ISBN Numbers</title> <body> <h1>ISBN Numbers</h1> <ul><xsl:apply-templates/></ul> </body> </html> Internet Technologies

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bib.xsl (continued) <xsl:template match = "book"> <li> <xsl:value-of select = /> </li> </xsl:template> <xsl:template match = "paper"> </xsl:template> </xsl:stylesheet> Internet Technologies

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bib.html <html> <title>ISBN Numbers</title> <body> <h1>ISBN Numbers</h1> <ul> <li> </li> <li> </li> </ul> </body> </html> Internet Technologies

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Bib.html Internet Technologies

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/ bib.xml bib <?xml version="1.0" ?> <bib> </bib> <book isbn = " "> <title> XSLT Programmer's Reference </title> <author> Michael Kay </author> </book> book paper book <paper> <title> GoTo Statement Considered Harmful </title> <author> Edsger Dijkstra</author> </paper> title : author : <book isbn = " "> <title> XML and Java Developing Web Application</title> <author> Maruyama </author> <author> Tamura</author> <author> Uramoto </author> </book> XSLT Prog… Michael Kay Internet Technologies

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/ bib.html <html> <title>ISBN Numbers</title> <body> <h1>ISBN Numbers</h1> <ul> <li> </li> <li> </li> </ul> </body> </html> html title body ul ISBN.. h1 li li 1-86… Internet Technologies

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bib2.xsl <?xml version="1.0"?> <!-- XSL to produce a list of titles and authors in HTML --> <xsl:stylesheet xmlns:xsl=" version="1.0"> <xsl:template match = "/"> <html> <title>Author(s)/Title</title> <body> <h1>Author(s)/Title</h1> <ul><xsl:apply-templates/></ul> </body> </html> </xsl:template> Internet Technologies

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bib2.xsl (continued) <xsl:template match = "book|paper"> <li> <xsl:for-each select = "author"> <xsl:value-of select = "." /> </xsl:for-each> <i> <xsl:value-of select = "title"/> </i> </li> </xsl:template> </xsl:stylesheet> Internet Technologies

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bib2.html <html> <title>Author(s)/Title</title> <body> <h1>Author(s)/Title</h1> <ul> <li> Michael Kay <i> XSLT Programmer's Reference </i> </li> <li> Edsger Dijkstra<i> GoTo Statement Considered Harmful </i> <li> Maruyama Tamura Uramoto <i> XML and Java Developing Web Application</i> </ul> </body> </html> Internet Technologies

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bib2.html Internet Technologies

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Bib3.xsl <?xml version="1.0"?> <xsl:stylesheet xmlns:xsl=" version="1.0"> <!-- Printing the last three authors in reverse order --> <xsl:template match = "/"> <html> <title>Author(s)</title> <body> <h1>Author(s)</h1> <ul> <xsl:apply-templates select = "/bib/book[2]/author[3]"/> <xsl:apply-templates select = "/bib/book[2]/author[2]"/> <xsl:apply-templates select = "/bib/book[2]/author[1]"/> </ul> </body> </html> </xsl:template> Internet Technologies

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Bib3.xsl (Continued) <xsl:template match = "author"> <li> <xsl:value-of select = "."/> </li> </xsl:template> </xsl:stylesheet> Internet Technologies

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Bib3.html <html> <title>Author(s)</title> <body> <h1>Author(s)</h1> <ul> <li> Uramoto </li> <li> Tamura</li> <li> Maruyama </li> </ul> </body> </html> Internet Technologies

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XML to HTML using XSLT A poem expressed in xml is converted to a poem expressed in html Internet Technologies

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Poem.xml (1 of 3) <?xml version="1.0" ?> <!-- A poem in XML Example taken from "XSLT Programmer's reference Michael Kay --> <poem> <author> Rupert Brooke </author> <date> 1912 </date> <title>Song</title> Internet Technologies

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Poem.xml (2 of 3) <stanza> <line>And suddenly the wind comes soft, </line> <line>And Spring is here again;</line> <line>And the hawthorn quickens with buds of green</line> <line>And my heart with buds of pain.</line> </stanza> <line>My heart all Winter lay so numb,</line> <line>The earth so dead and frore,</line> <line>That I never thought the Spring would come again</line> <line>Or my heart wake any more.</line> Internet Technologies

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Poem.xml (3 of 3) <stanza> <line>But Winter's broken and earth has woken, </line> <line>And the small birds cry again;</line> <line>And the hawthorn hedge puts forth its buds,</line> <line>And my heart puts forth its pain.</line> </stanza> </poem> Internet Technologies

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Poem.html Internet Technologies

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Poem.xsl (1 of 4) <?xml version="1.0"?> <!-- XSL to produce an HTML encoded poem XSLT Programmer's reference, Michael Kay --> <xsl:stylesheet xmlns:xsl=" version="1.0"> <xsl:template match = "poem"> <html> <head> <title> <xsl:value-of select="title"/> </title> </head> Internet Technologies

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Poem.xsl (2 of 4) <body> <xsl:apply-templates select = "title"/> <xsl:apply-templates select = "author"/> <xsl:apply-templates select = "stanza"/> <xsl:apply-templates select = "date"/> </body> </html> </xsl:template> Internet Technologies

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Poem.xsl (3 of 4) <xsl:template match = "title"> <div align="center"><h1><xsl:value-of select="."/></h1></div> </xsl:template> <xsl:template match = "author"> <div align="center"><h2>By <xsl:value-of select="."/></h2></div> <xsl:template match = "date"> <p><i><xsl:value-of select="."/></i></p> Internet Technologies

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Poem.xsl (4 of 4) <xsl:template match="stanza"> <p><xsl:apply-templates select="line"/></p> </xsl:template> <xsl:template match = "line"> <xsl:if test="position() mod 2 = 0">  </xsl:if> <xsl:value-of select="."/><br/> </xsl:stylesheet> Nonbreaking space   not included automatically in xml as in html Internet Technologies

34 XSLT’s Processing Model
Consider the following XML file <person> <name>Alan</name> <age>19</age> </person> We’ll look at a way to view this tree as a set. Internet Technologies

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/ person <person> <name>Alan</name> <age>19</age> </ > </person> name age 19 Alan This is the normal way an XSLT programmer views the document. Internet Technologies

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<person> <name>Alan</name> <age>19</age> </person> We can represent this tree as a set. {person : { name : alan, age : 19, } A tree will be represented as a set of ordered pairs. Internet Technologies

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Another example {biblio:{ book:{author:Smith,author:Jones,date:1976}, <biblio> <book> <author> Smith </author> <author> Jones </author> <date> 1976 </date> </book> <author> Bell </author> <date> 1999 </date> <paper> <title> Public key encryption</title> <author> Kensworth </author> </paper> </biblio> book:{author:Bell,date:1999}, paper:{title:Public key encryption, author:Kensworth} } } Internet Technologies

38 XSLT uses Structural Recursion
We apply transformation rules in a top-down manner. Non-leafs normally generate recursive calls. An XSLT stylesheet can be viewed as a function that defines a transformation. O = S(I) I is the input document S is the stylesheet O is the output document Internet Technologies

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An example // This program replaces integers with strings. f(v) = if isInt(v) then intTwoString(v) else v f({}) = {} f({r : t }) = { r : f(t) } f( t1 union t2 ) = f(t1) union f(t2) Internet Technologies

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An example f(v) = if isInt(v) then intTwoString(v) else v f({}) = {} f({r : t }) = { r : f(t) } f( t1 union t2 ) = f(t1) union f(t2) f({biblio:{ book:{author:Smith, author:Jones, date:1976}, book:{author:Bell,date:1999}, paper:{title:Public key encryption, author:Kensworth} } }) = Internet Technologies

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An example f(v) = if isInt(v) then intTwoString(v) else v f({}) = {} f({r : t }) = { r : f(t) } f( t1 union t2 ) = f(t1) union f(t2) We have a match = {biblio: f({ book:{author:Smith, author:Jones, date:1976}, book:{author:Bell,date:1999}, paper:{title:Public key encryption, author:Kensworth} } ) Internet Technologies

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We have a match f( t1 union t2 ) = f(t1) union f(t2) f({ book:{author:Smith, author:Jones, date:1976}, book:{author:Bell,date:1999}, paper:{title:Public key encryption, author:Kensworth} }) = f({ book:{author:Smith, author:Jones, date:1976}, book:{author:Bell,date:1999} }) union f({ paper:{title:Public key encryption, author:Kensworth} }) Internet Technologies

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f(v) = if isInt(v) then intTwoString(v) else v f({}) = {} f({r : t }) = { r : f(t) } f( t1 union t2 ) = f(t1) union f(t2) We have a match f({ book:{author:Smith, author:Jones, date:1976}, book:{author:Bell,date:1999} }) = f( {book :{author:Smith, author:Jones, date:1976}}) union f( {book:{author:Bell,date:1999}} Internet Technologies

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f(v) = if isInt(v) then intTwoString(v) else v f({}) = {} f({r : t }) = { r : f(t) } f( t1 union t2 ) = f(t1) union f(t2) We have a match f( {book :{author:Smith, author:Jones, date:1976}}) = { book : f({author:Smith, author:Jones, date:1976}) } Internet Technologies

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f(v) = if isInt(v) then intTwoString(v) else v f({}) = {} f({r : t }) = { r : f(t) } f( t1 union t2 ) = f(t1) union f(t2) We have a match f({author:Smith, author:Jones, date:1976}) = f({author:Smith}) union f({author : Jones, date:1976}) Internet Technologies

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f(v) = if isInt(v) then intTwoString(v) else v f({}) = {} f({r : t }) = { r : f(t) } f( t1 union t2 ) = f(t1) union f(t2) We have a match f({author:Smith}) = { author : f (Smith) } Internet Technologies

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f(v) = if isInt(v) then intTwoString(v) else v f({}) = {} f({r : t }) = { r : f(t) } f( t1 union t2 ) = f(t1) union f(t2) We have a match { author : f (Smith) } = { author : Smith } … and so on … Internet Technologies

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f({biblio:{ book:{author:Smith, author:Jones, date:1976}, book:{author:Bell,date:1999}, paper:{title:Public key encryption, author:Kensworth} } }) = {biblio:{book:{author:Smith, author:Jones, date:”1976”}, book:{author:Bell,date:”1999”}, Internet Technologies

49 An Example From The Financial World (FpML)
FpML (Financial products Markup Language) is a new protocol to enable e-commerce activities in the field of financial derivatives. It is based on XML (Extensible Markup Language), the standard meta-language for describing data shared between applications. Ultimately, it will allow for the electronic integration of a range of services, from electronic trading and confirmations to portfolio specification for risk analysis. All categories of over-the-counter (OTC) derivatives will eventually be incorporated into the standard; however, the initial release will focus on interest rate swaps and Forward Rate Agreements (FRAs). Taken from Internet Technologies

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Who put FpML together? Goldman Sachs IBM J.P. Morgan Morgan Stanley Dean Witter PricewaterhouseCoopers Reuters SunGard Trading and Risk Systems S.W.I.F.T. Society for Worldwide Interbank Financial Telecommunication UBS Warburg webMethods Bank of America BNP Paribas Chase Manhattan Bank Citigroup Concordia Net Credit Suisse First Boston Deutsche Bank Extensibility FinancialFusion Fuji Capital Markets Internet Technologies

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An FpML Document <?xml version="1.0" standalone="no"?> <!-- Copyright (c) 1999 by J.P.Morgan and PricewaterhouseCoopers. PricewaterhouseCoopers refers to the individual member firms of the World wide PricewaterhouseCoopers organization. All rights reserved. --> <!-- version 1.0b2 : August 6, > Internet Technologies

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<fpml:FpML xmlns:fpml='urn:fpml-FpML' xmlns:m='urn:fpml-money' xmlns:r='urn:fpml-rate'> <fpml:Trade> <fpml:tradeIDs> <tid:TradeIDs xmlns:tid="urn:fpml-TradeID"> <tid:TradeID> <tid:partyReference>XYZ Investement Bank</tid:partyReference> <tid:transactionReferenceNumber>237732</tid:transactionReferenceNumber> </tid:TradeID> <tid:partyReference>ABC Investments</tid:partyReference> <tid:transactionReferenceNumber>1230</tid:transactionReferenceNumber> </tid:TradeIDs> </fpml:tradeIDs> Internet Technologies

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<fpml:product> <fpswp:FXSwap xmlns:fpswp="urn:fpml-FX-Product-SwapType"> <fpswp:productID>P123908</fpswp:productID> <!-- at the moment valid value is FXSwap. it could be expanded later --> <fpswp:productType>FXSwap</fpswp:productType> <fpswp:nearLeg> <ftsl:FXLegTemplate xmlns:ftsl="urn:fpml-FX-Template-Leg" xmlns:fxs="urn:fpml-shared-FX"> <fxs:ccy1>SFC</fxs:ccy1> <fxs:ccy2>GBP</fxs:ccy2> <fxs:ccy1BuyerReference>ABC Investments</fxs:ccy1BuyerReference> <fxs:ccy2BuyerReference>XYZ Investement Bank</fxs:ccy2BuyerReference> <fxs:ccy1Amount> <m:Money> <m:ccy>SFC</m:ccy> <m:amount> </m:amount> </m:Money> </fxs:ccy1Amount> Internet Technologies

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<fxs:ccy2Amount> <m:Money> <m:ccy>GBP</m:ccy> <m:amount> </m:amount> </m:Money> </fxs:ccy2Amount> <fxs:settlementDate> </fxs:settlementDate> <fxs:exchangeRate> <r:FXRate> <r:ccy1>SFC</r:ccy1> <r:ccy2>GBP</r:ccy2> <r:type>offer</r:type> <r:quoteBasis>CCY1PERCCY2</r:quoteBasis> <r:rate>1.56</r:rate> </r:FXRate> </fxs:exchangeRate> </ftsl:FXLegTemplate> </fpswp:nearLeg> Internet Technologies

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<fpswp:farLeg> <ftsl:FXLegTemplate xmlns:ftsl="urn:fpml-FX-Template-Leg" xmlns:fxs="urn:fpml-shared-FX"> <fxs:ccy1>SFC</fxs:ccy1> <fxs:ccy2>GBP</fxs:ccy2> <fxs:ccy1BuyerReference>XYZ Investement Bank</fxs:ccy1BuyerReference> <fxs:ccy2BuyerReference>ABC Investments</fxs:ccy2BuyerReference> <fxs:ccy1Amount> <m:Money> <m:ccy>SFC</m:ccy> <m:amount> </m:amount> </m:Money> </fxs:ccy1Amount> <fxs:ccy2Amount> <m:ccy>GBP</m:ccy> <m:amount> </m:amount> </fxs:ccy2Amount> Internet Technologies

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<fxs:settlementDate> </fxs:settlementDate> <fxs:exchangeRate> <r:FXRate> <r:ccy1>SFC</r:ccy1> <r:ccy2>GBP</r:ccy2> <r:type>offer</r:type> <r:quoteBasis>CCY1PERCCY2</r:quoteBasis> <r:rate>1.66</r:rate> </r:FXRate> </fxs:exchangeRate> </ftsl:FXLegTemplate> </fpswp:farLeg> </fpswp:FXSwap> </fpml:product> Internet Technologies

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<fpml:partyInformation> <pty:PartyInformation xmlns:pty="urn:fpml-party" xmlns:a="urn:fpml-contact"> <pty:tradeParties> <pty:Party name="ABC_Trust"> <pty:partyType>COUNTERPARTY</pty:partyType> <pty:corporateInformation> <pty:CorporateInformation> <pty:shortName>ABC Investments</pty:shortName> </pty:CorporateInformation> </pty:corporateInformation> <pty:confirmInformation> <pty:ConfirmInformation> <pty:primaryConfirmContact> Internet Technologies

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<a:Contact> <a:contactName>Jacob Smith</a:contactName> <a:contactOrganizationName>ABC Investments</a:contactOrganizationName> <a:phoneNumber> </a:phoneNumber> <a:faxNumber> </a:faxNumber> <a:contactAddress> <a:Address> <a:streetAddress> <a:StreetAddress> <a:streetLine>123, Park Avenue</a:streetLine> </a:StreetAddress> </a:streetAddress> <a:city>New York</a:city> <a:state>NY</a:state> <a:country>US</a:country> <a:postalCode>10387</a:postalCode> </a:Address> </a:contactAddress> </a:Contact> Internet Technologies

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</pty:primaryConfirmContact> </pty:ConfirmInformation> </pty:confirmInformation> <pty:settlementInformation> <pty:SettlementInstructions> <pty:settlementContact> <a:Contact> <a:contactName>Jacob Smith</a:contactName> <a:contactOrganizationName>Trade Settlements</a:contactOrganizationName> <a:phoneNumber> </a:phoneNumber> <a:faxNumber> </a:faxNumber> </a:Contact> </pty:settlementContact> Internet Technologies

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<pty:paymentInstructions> <pty:PaymentInstructions> <pty:settlementCurrency>GBP</pty:settlementCurrency> <pty:payFromName>ABC Bank PLC</pty:payFromName> <pty:correspondentInformation> <pty:FIRoutingInformation> <pty:fiName>ABC Bank PLC</pty:fiName> <pty:fiAddress> <a:Address> <a:city>London</a:city> <a:country>UK</a:country> </a:Address> </pty:fiAddress> <pty:fiAccountNumber>123456</pty:fiAccountNumber> <pty:fiRoutingID>ABC45678UK33</pty:fiRoutingID> <pty:fiRoutingIDType>SwiftBIC</pty:fiRoutingIDType> </pty:FIRoutingInformation> </pty:correspondentInformation> Internet Technologies

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<pty:intermediaryInformation> <pty:FIRoutingInformation> <pty:fiName>XYZ Bank PLC</pty:fiName> <pty:fiAccountNumber>293774</pty:fiAccountNumber> </pty:FIRoutingInformation> </pty:intermediaryInformation> <pty:beneficiaryInformation> <pty:fiName>ABC Brokers</pty:fiName> <pty:fiAccountNumber>/ </pty:fiAccountNumber> <pty:fiReferenceText>For the account of Harry Smith-/ </pty:fiReferenceText> </pty:beneficiaryInformation> </pty:PaymentInstructions> </pty:paymentInstructions> </pty:SettlementInstructions> </pty:settlementInformation> </pty:Party> Internet Technologies

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<!-- Also expected is the full settlement instructions for: <pty:partyReferenceName>XYZ Investment bank</pty:partyReferenceName> ... --> </pty:tradeParties> </pty:PartyInformation> </fpml:partyInformation> </fpml:Trade> </fpml:FpML> Internet Technologies

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FpML to HTML using XSLT <?xml version="1.0"?> <xsl:stylesheet xmlns:xsl=" xmlns:tid="urn:fpml-TradeID" version="1.0"> <!-- Display party reference data --> Internet Technologies

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<xsl:template match = "/" > <html> <title>Foreign Exchange Swap</title> <body> <xsl:apply-templates/> </body> </html> </xsl:template> Internet Technologies

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<xsl:template match = "* | text()"> <xsl:apply-templates/> </xsl:template> <xsl:template match="tid:partyReference"> <p> <xsl:value-of select="."/> </p> </xsl:stylesheet> Internet Technologies

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XSLT Transforms Data for different devices. Internet Technologies

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WML <?xml version="1.0"?> <!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN“ " <wml> <template> <do type="back" label="Back"> <prev/> </do> </template> <card id="main" title="Welcome to my WAP"> <p align="center">I can't say much, since this screen is tiny.<br/> Why don't you visit my <a href="#fave">favorite WAP links.</a> </p> </card> Internet Technologies

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<card id="fave" title="Favorite WAP Links"> <p align="center">These are some WAP sites I would love, if they existed.</p> <p align="left"> <a href="wap.cats.com”>Dog pictures</a><br/> <a href="wap.weather.com">The weather</a><br/> <a href="wap.jellybeans.org">One click jelly bean ordering</a> </p> </card> </wml> Internet Technologies

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Next Up XMPP - Extensible Message and Presence Protocol Internet Technologies

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Bibliography XSLT Programmer’s Reference, Michael Kay, Wrox Data on the Web, Abiteboul, Buneman, Suciu, Morgan Kaufmann XML Bible, Elliotte Rusty Harold, IDG Books Internet Technologies


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