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IEEM 5352 E-Enterprise Integration. eXtensible Markup Language (XML). What is XML?. XML: eXtensible Markup Language (XML) defines an universal standard for electronically exchanging data for the Internet and Web applications and is supported by major IT vendors. Topics covered include:

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ieem 5352 e enterprise integration

IEEM 5352E-Enterprise Integration

eXtensible Markup Language (XML)

what is xml
What is XML?
  • XML: eXtensible Markup Language (XML) defines an universal standard for electronically exchanging data for the Internet and Web applications and is supported by major IT vendors. Topics covered include:
    • Authoring XML element and documents
    • XML schema and Document Type Definition (DTD)
    • XSL (eXtensible Style Language) for transforming XML to HTML
    • Tools for authoring and browsing XML to document
  • XML 是在網際網路及Web上定義資料標準格式之語言。 XML是將傳統的SGML加以簡化,但是又比HTML有彈性,使用者可自行定義標籤 (Tags), 用來傳輸有結構性的資料是HTML之後方興未艾的Web標準。在電子商務上,尤其企業間(B2B) 電子商務交易,XML將式資料交換企業整合的重要技術與標準。
slide3
XML can take large chunks of information and consolidate them into an XML document - meaningful pieces that providestructure and organization to the information.
xml documents
XML Documents
  • An well formed XML document can be read and understood by an XML parser.
  • DTD (Document Type Definition) determines the structure and elements of an XML document.
  • XML parsers read XML documents and xtract the data for access by another program.
exl enabled standards
EXL-Enabled Standards
  • RosettaNet is a consortium of product vendors and end users that defines a framework for data and process interchange with e-business -XML document and standard process flows.
  • XEDI is published specification describing how to map traditional EDI to XML and back again.
  • BizTalk is an industry consortium founded by Microsoft to define a standard XML grammar for XML-based messaging and metadata.
exl enabled standards cont
EXL-Enabled Standards (cont.)
  • XFRML is an XML standard for reporting financial information over the Internet.
  • XML-Schema is a working group of the W3C that is looking to describe a better mechanism for determining the structure of an XML document.
  • XML Query is another W3C working group looking to create a common set of operations and language syntax for accessing persisted XML data.
  • XSLT provides a standard XML document transformation mechanism using a stylesheet as a common processing engine.
xml tools
XML Tools
  • XML Notepad (XML Editing Tool)
    • http://msdn.microsoft.com (.NET Frameworks 2.0)
    • http://www.microsoft.com/downloads/details.aspx?familyid=72d6aa49-787d-4118-ba5f-4f30fe913628&displaylang=en (XML Notepad)
  • XML Parser
    • Edit/Create Cascading Style Sheet (CSS)
    • http://www.microsoft.com/downloads/thankyou.aspx?familyId=2cf40ae6-368c-4b6b-a185-2dfa92fb7993&displayLang=en (Microsoft XML Parser)
xml example file prods xml
XML Example File (prods.xml)

<?xml version=“1.0”?>

<PRODUCTLIST xmlns=“x-schems:listschema.xml”>

<PRODUCT>

<ID>722</ID>

<NAME>PENTIUM 100</NAME>

<PRICE>1000</PRICE></PRODUCT>

<PRODUCT>

<ID>721</ID>

<NAME>PENTIUM 11 300<NAME>

<PRICE>5000</PRICE></PRODUCT>

<PRODUCT>

<ID>720</ID>

<NAME>PENTIUM 111 450</NAME>

<PRICE>15000</PRICE> </PRODUCT>

</PRODUCTLIST>

rules for well formed xml
Rules for Well-Formed XML
  • Mandatory Closing Tag
    • The set of tags are unlimited but all container tags must have end tag, e.g., <tag>…</tag>.
  • Example:
  • <number>kj9876_34</number>
  • <due>1/12/98</due>
  • <bill_to>MTB1</bill_to>
  • <ship_to>MTO1</ship_to>
  • <selling_party>AC987</selling_party>
rules for well formed xml cont
Rules for Well-Formed XML (cont.)
  • Proper Element Nesting
    • All tags must be nested correctly. Like HTML, XML can intermix tag, but tags may not overlap each other.
  • Legal XML

<PRODUCT>

<ID>721</ID>

<NAME>PENTIUM 11 300</NAME>

<PRICE>5000</PRICE>

</PRODUCT>

Illegal XML

<PRODUCT>

<ID>

<NAME>PENTIUM 11 300<NAME>

<PRICE>5000</PRICE>

</PRODUCT>

</ID>

rules for well formed xml cont 2
Rules for Well-Formed XML (cont. 2)
  • Double-quote value delimiters
    • All attribute values must be enclosed in single or double quotation marks.
  • Legal:
    • <tag attribute=“value”>
  • Illegal:
    • <font size = 6>

<XML>

<xml>

are different

rules for well formed xml cont 3
Rules for Well-Formed XML (cont. 3)
  • Single tag element
    • Singleton tag (called empty element or tags without content) must be written in an abbreviated form using special XML syntax.
  • Legal:
    • <BR/>
  • <TITLE></TITLE> is equivalent to <TITLE/>
xml with an internal dtd
XML with an internal DTD

DTD (Baseball.dtd)

<!ELEMENT BASEBALL (TEAM)+>

<!ELEMENT TEAM (CITY, PLAYER*)>

<!ELEMENT CITY (#PCDATA)>

<!ELEMENT PLAYER (LASTNAME, FIRSTNAME, AVG)>

<!ELEMENT FIRSTNAME (#PCDATA)>

<!ELEMENT LASTNAME (#PCDATA)>

<!ELEMENT AVG (#PCDATA)>

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE BASEBALL SYSTEM "Baseball.dtd">

<BASEBALL>

<TEAM>

<CITY>New York</CITY>

<PLAYER>

<LASTNAME>Strawberry</LASTNAME>

<FIRSTNAME>Daryl</FIRSTNAME>

<AVG>.286</AVG>

</PLAYER>

</TEAM>

<TEAM>

<CITY>Baltimore</CITY>

<PLAYER>

<LASTNAME>Alomar</LASTNAME>

<FIRSTNAME>Roberto</FIRSTNAME>

<AVG>.287</AVG>

</PLAYER>

</TEAM>

</BASEBALL>

+: 1 or more

*: 0, 1 or more

slide17

XML 之網頁呈現

DTD/

XML Schema

Structure

Processing for Display or Conversion

Document with

Special Format

(HTML/CSS)

XML

document

content

XSL

Display

XML Parser

xml parser
XML Parser

SERVER

NETWORK

CLIENT

XML

PARSER

Client

Application

XML

Converter

Client Application

Database

XML

xml schema
XML SCHEMA
  • XML SCHEMA (XML-DATA)
    • Much richer and more extensible way
    • Describe the rule for the content of a document and use XML itself as a grammar
    • It was submitted to the W3C as the XML-DATA submission
xml schema1
XML SCHEMA
  • A schema is defined using a particular XML syntax
  • <ElementType name="to" content="textOnly" />
  • <ElementType name="from" content="textOnly" />
  • <ElementType name="cc" content="textOnly" />
  • <ElementType name="bcc" content="mixed">
  • <attribute type="hidden" required="yes" />
  • </ElementType>
  • <element type="to" minOccurs="1" maxOccurs="*" />
  • <element type="from" minOccurs="1" maxOccurs="1" />
  • <element type="cc" minOccurs="0" maxOccurs="*" />
  • <element type="bcc" minOccurs="0" maxOccurs="*" />

Multiple

slide21

XML and XSL

XML

XML

HTML

Internet

Web

Server

XSL

(Browser)

eXtensible

Stylesheet

Language (XSL)

xsl example file
XSL Example File

<?xml version=“1.0”?>

<HTML xmlns:xsl=“http:www.w3.org/tr/wd-xsl”>

<body>

<h1>test</h1>

<xsl:for-each select=“PRODUUCTLIST/PRODUCT”>

<DIV STYLE=“background-color:teal;color:white;padding:4px”>

<SPAN STYLE=“font-weight:bold;color:white”>

<xsl:value-of select=“id”/></SPAN>

<xsl:value-of select=“name”/>

</DIV>

<DIV STYLE=“margin-left:20px;margin-bottom:font-size:12pt”>

<I>price:<xsl:value-of select=“price”/></I>

</DIV>

<xsl:for-each>

</body>

</HTML>

slide23

Business to Customer

Order this book

Web

Server

Bookstore

Database

Bookstore

Customer

Index all book

Search

Order

books

Book List Publish

publisher

Publisher

XML

references
References
  • Http://www.w3.org
  • Extensible Markup Language (XML) 1.1 (Second Edition)
    • http://www.w3.org/TR/2006/REC-xml11-20060816
  • Extensible Stylesheet Language (XSL) Version 1.1
    • http://www.w3.org/TR/2006/REC-xsl11-20061205/
  • XSL Transformation (XSLT)
    • http://www.w3.org/TR/2007/REC-xslt20-20070123/