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By HITESHWAR KUMAR AZAD Ph.D Scholar
XML WEB SERVICES By HITESHWAR KUMAR AZAD Ph.D Scholar
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Syllabus XML: Introduction to XML, DTD, CSS, Namespace, Schema, XSD, XSL. Introduction to Web Services : The Web Services Type System , DataType Mappings SOAP: Communication on the Web WSDL: Describing Web Services SOAP Tools : SOAP Toolkit ,components and architecture, exposing and invoke Web services. Developing Web Services : Using ASP.Net application using C# programming environment. Web Services : Working with WSDL, and invoking them using .NET client /Java Client through the code. SOAP Header : Managing the risks of Web Service, Interface-Based Web Service Development of Interface-based Programming: WSDL bindings, Reusable Web Services Infrastructure UDDI: A Web Service, Framework & sample applications SOAP Toolkit interoperability
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Course structure & marks distribution
Course name: XML web services Course code: IT 1823 L-T-P: 3-0-3 Credits: 5 Total marks: 100 Theory : 60 marks Lab : 40 marks
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Marks distribution
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Marks distribution
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Books Text Books: 1. XML 1.1 Bible, Edition by Elliotte Rusty Harold (Wiley) 2. XML Web Services & Data Revolution by Coyle (Pearson Education Asia) Reference Books : 1. Beginning XML by David Hunter, Andrew Watt ( Wrox Publication) 2.Professional ASP.NET 2.0 by Thiru Thangarathinam ( Wrox Publication)
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XML: eXtensive Markup Language
XML is simply a text document that allows users to store data in a structured manner that also encodes information or “ metadata” as to what that data means. XML was designed to store and transport data. XML was design to be both human and machine readable. XML is a software and hardware independent tool for storing and transporting data.
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XML example <?xml version=“1.0” encoding=“UTF-8”?> <note> <to>Tom</to> <from>Jerry</from> <heading>Reminder</heading> <body>Don’t forget me this weekend</body> </note>
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XML As a self-Describing language
<?xml version=“1.0”?> <the_following_text_is_my_college>NIT Patna</the_following_text_is_my_college>
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XML An XML document consists of the following parts: Prolog Body
XML declaration Optional processing instruction Comments Document Type Declaration
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XML Declaration Comments <?xml version=“1.0” encoding=“UTF-8”?>
It is not mandatory, but w3c recommends it. XML Declaration: <?xml version=“1.0”?> encoding : it specifies the type of encoding scheme used in the document. <?xml version=“1.0” encoding=“UTF-8”?> UTF: (Unicode Transformation Format) Standalone: this optional indicates whether the document can be processed as a standalone document or is dependents on other documents. <?xml version=“1.0” encoding=“UTF-8” standalone=“no”?> Comments Starts with <!--and end with --> <!--comment text -->
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XML BODY <?xml version="1.0" encoding="UTF-8"?> <bookstore> <book category="cooking"> <title lang="en">Everyday Italian</title> <author>Giada De Laurentiis</author> <year>2005</year> <price>30.00</price> </book> <book category="children"> <title lang="en">Harry Potter</title> <author>J K. Rowling</author> <year>2005</year> <price>29.99</price> </book> <book category="web"> <title lang="en">Learning XML</title> <author>Erik T. Ray</author> <year>2003</year> <price>39.95</price> </book> </bookstore>
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Rule of XML structure All XML Elements Must Have a Closing Tag
<markup>this is wrong <markup> since there is no closing tag XML Tags are Case Sensitive <Message>This is incorrect</message> <message>This is correct</message> XML Elements Must be Properly Nested <oxygen><nitrogen> These tag are improperly nested</oxygen></nitrogen> XML Attribute Values Must be Quoted <note date=12/11/2007> <to>Tove</to> <from>Jani</from> </note>
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Rule of XML structure XML Documents Must Have a single Root Element
<?xml version=“1.0”?> <father> <son> <daughter> </daughter> </son> </father> <mother> </mother>
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XML Elements What is an XML Element? text attributes other elements
An XML element is everything from (including) the element's start tag to (Including) the element's end tag. <price>29.99</price> An element can contain: text attributes other elements or a mix of the above <bookstore> <book category="children"> <title>Harry Potter</title> <author>J K. Rowling</author> <year>2005</year> <price>29.99</price> </book> <book category="web"> <title>Learning XML</title> <author>Erik T. Ray</author> <year>2003</year> <price>39.95</price> </book> </bookstore>
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<book> has an attribute (category="children").
<bookstore> <book category="children"> <title>Harry Potter</title> <author>J K. Rowling</author> <year>2005</year> <price>29.99</price> </book> <book category="web"> <title>Learning XML</title> <author>Erik T. Ray</author> <year>2003</year> <price>39.95</price> </book> </bookstore> <title>, <author>, <year>, and <price> have text content because they contain text (like 29.99). <bookstore> and <book> have element contents, because they contain elements. <book> has an attribute (category="children").
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XML Attributes XML elements can have attributes, just like HTML.
Attributes are designed to contain data related to a specific element. XML Attributes Must be Quoted <person gender="female"> or <person gender='female'> If the attribute value itself contains double quotes you can use single quotes, like in this example: <gangster name='George "Shotgun" Ziegler'>
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XML Elements vs. Attributes
<person gender="female"> <firstname>Anna</firstname> <lastname>Smith</lastname> </person> <person> <gender>female</gender> <firstname>Anna</firstname> <lastname>Smith</lastname> </person>
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A date attribute is used in the first example:
The following three XML documents contain exactly the same information: A date attribute is used in the first example: <note date=" "> <to>Tove</to> <from>Jani</from> </note> A <date> element is used in the second example: <note> <date> </date> <to>Tove</to> <from>Jani</from> </note> An expanded <date> element is used in the third example: <note> <date> <year>2008</year> <month>01</month> <day>10</day> </date> <to>Tove</to> <from>Jani</from> </note>
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XML Attributes for Metadata
metadata (data about data) should be stored as attributes, and the data itself should be stored as elements. <messages> <note id="501"> <to>Tove</to> <from>Jani</from> <heading>Reminder</heading> <body>Don't forget me this weekend!</body> </note> <note id="502"> <to>Jani</to> <from>Tove</from> <heading>Re: Reminder</heading> <body>I will not</body> </note> </messages>
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