Extensible Markup LanguageObjectives                In this session, you will learn to:                   Identify the XML...
Extensible Markup LanguageIdentifying the XML Document Object Model                DOM defines the logical structure of do...
Extensible Markup LanguageImplementation of DOM in MSXML Parser               MSXML parser:                  Is the Micros...
Extensible Markup LanguageXML DOM Objects and Methods               Following are the key DOM objects:                  Do...
Extensible Markup LanguageXML DOM Objects and Methods (Contd.)               Following are the key DOM objects:           ...
Extensible Markup LanguageXML DOM Objects and Methods (Contd.)               Following are the key DOM objects:           ...
Extensible Markup LanguageXML DOM Objects and Methods (Contd.)               Following are the key DOM objects:           ...
Extensible Markup LanguageXML DOM Objects and Methods (Contd.)               Following are the key DOM objects:           ...
Extensible Markup LanguageXML DOM Objects and Methods (Contd.)               Following are the key DOM objects:           ...
Extensible Markup LanguageXML DOM Objects and Methods (Contd.)               Following are the key DOM objects:           ...
Extensible Markup LanguageXML DOM Objects and Methods (Contd.)               Following are the key DOM objects:           ...
Extensible Markup LanguageXML DOM Objects and Methods (Contd.)               Following are the key DOM objects:           ...
Extensible Markup LanguageXML DOM Objects in Scripts                The DOM objects can be used within scripting languages...
Extensible Markup LanguageValidating an XML Document Against an XML Schema Using DOM                 DOM:                 ...
Extensible Markup LanguageAccessing an XML Document by Using the XMLSchemaCache Object               •   Used to hold a co...
Extensible Markup LanguageValidating an XML Document Against the Schema                To write a script that validates an...
Extensible Markup LanguageDemo: Validating an XML Document               Problem Statement:                The head offic...
Extensible Markup LanguageApplying a Style Sheet to an XML Document                •   Style sheet object that passes into...
Extensible Markup LanguageThe XSLTemplate Object               Is a DOM object that is used to access an XSLT style sheet....
Extensible Markup LanguageThe XSLProcessor Object (Contd.)                •   Used to apply a style sheet to an XML docume...
Extensible Markup LanguageDemo: Applying a Style Sheet to an XML Document During Run Time                Problem Statement...
Extensible Markup LanguageExercises                Problem Statement:                 The following XML document, custome...
Extensible Markup LanguagePractice Questions                • Which of the following methods of the DOMDocument object    ...
Extensible Markup LanguagePractice Questions                • You have written a script to load an XML document and       ...
Extensible Markup LanguagePractice Questions                • Which of the following properties of the IXMLDOMNode        ...
Extensible Markup LanguagePractice Questions                • Which of the following properties of the                  IX...
Extensible Markup LanguagePractice Questions                Which one of the following is an object that represents the   ...
Extensible Markup LanguageSummary               In this session, you learned that:                 The XMLSchemaCache obj...
Extensible Markup LanguageSummary (Contd.)                The XSLProcessor object provides the transform()               ...
Extensible Markup LanguageSummary (Contd.)                 Some DOM objects that are used to manipulate data in a         ...
Extensible Markup LanguageSummary (Contd.)                The Node object represents a node in the XML document          ...
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Xml session08

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  • Introduce the students to the course by asking them what they know about forensics. Next, ask the students what they know about system forensics and why is it required in organizations dependent on IT. This could be a brief discussion of about 5 minutes. Lead the discussion to the objectives of this chapter.
  • Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
  • Introduce the students to the different types of threats that systems face by: Asking the students to give examples of what they think are environmental and human threats. Asking the students to give instances of what they think are malicious and non-malicious threats. Conclude the discussion on the different types of threats by giving additional examples of malicious and non malicious threats.
  • Hold a two- three minute discussion on the different types of system-related crimes that the students have experienced or heard. At the end of the discussion, give additional examples of system-related crimes.
  • Hold a two- three minute discussion on the different types of system-related crimes that the students have experienced or heard. At the end of the discussion, give additional examples of system-related crimes.
  • Hold a two- three minute discussion on the different types of system-related crimes that the students have experienced or heard. At the end of the discussion, give additional examples of system-related crimes.
  • Hold a two- three minute discussion on the different types of system-related crimes that the students have experienced or heard. At the end of the discussion, give additional examples of system-related crimes.
  • Hold a two- three minute discussion on the different types of system-related crimes that the students have experienced or heard. At the end of the discussion, give additional examples of system-related crimes.
  • Hold a two- three minute discussion on the different types of system-related crimes that the students have experienced or heard. At the end of the discussion, give additional examples of system-related crimes.
  • Hold a two- three minute discussion on the different types of system-related crimes that the students have experienced or heard. At the end of the discussion, give additional examples of system-related crimes.
  • Hold a two- three minute discussion on the different types of system-related crimes that the students have experienced or heard. At the end of the discussion, give additional examples of system-related crimes.
  • Hold a two- three minute discussion on the different types of system-related crimes that the students have experienced or heard. At the end of the discussion, give additional examples of system-related crimes.
  • Elaborate on the role that system forensics plays in an organization, based on the discussion in the previous slide and the information given on this slide.
  • While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
  • While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
  • While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
  • While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
  • While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
  • While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
  • While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
  • While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
  • While explaining the definition of system forensics, ask the students to note the following key words in the definition: Identify Extract Process Analyze Digital and hardware evidence Tell the students that these form an integral aspect of system forensics and would be discussed in detail. Before moving on to the next slide, hold a brief discussion on why is it important for organizations to take the help of system forensics. The discussion should be focused on: The role that system forensics plays in organizations having an IT set up. This discussion will serve as a precursor to the next slide.
  • Reiterate the concepts taught earlier by asking the given question.
  • Reiterate the concepts taught earlier by asking the given question.
  • Reiterate the concepts taught earlier by asking the given question.
  • Reiterate the concepts taught earlier by asking the given question.
  • Reiterate the concepts taught earlier by asking the given question.
  • Transcript of "Xml session08"

    1. 1. Extensible Markup LanguageObjectives In this session, you will learn to: Identify the XML Document Object Model Validate an XML document against an XML schema using the Document Object Model Apply a Style Sheet to an XML document Ver. 1.0 Session 8 Slide 1 of 31
    2. 2. Extensible Markup LanguageIdentifying the XML Document Object Model DOM defines the logical structure of documents. DOM provides an Application Programming Interface (API) for dynamically accessing and manipulating a document. The DOM objects have associated methods and properties to access and manipulate a document. A DOM-enabled parser is required to use the features provided by DOM. A DOM-enabled parser: Parses an XML document to ascertain its validity. Creates an in‑memory representation of the XML document as a tree structure. Ver. 1.0 Session 8 Slide 2 of 31
    3. 3. Extensible Markup LanguageImplementation of DOM in MSXML Parser MSXML parser: Is the Microsoft implementation of DOM. Provides fundamental as well as added interfaces to access documents. The following figure represents how a DOM tree is used by applications to access data. MSXML Library XML DOM Tree Document Parser Root Application Parsed Child Document Text Child Text Ver. 1.0 Session 8 Slide 3 of 31
    4. 4. Extensible Markup LanguageXML DOM Objects and Methods Following are the key DOM objects: Document Element Node NodeList Attr Text CDataSection ParseError Ver. 1.0 Session 8 Slide 4 of 31
    5. 5. Extensible Markup LanguageXML DOM Objects and Methods (Contd.) Following are the key DOM objects: – Document aIt is the top-level object that implements all the basic DOM methods. – Element aIt also has methods that support XSLT. – Node aIt has methods that can be used to navigate, – NodeList query, and modify the content and structure of an XML document. – Attr aSome of the methods provided by this object – Text are createElement(), createAttribute(), createComment() , and createTextNode(). – CDataSection aSome of the properties provided by this object that – ParseError help in manipulating the information contained in the object are async, childNodes, firstChild, documentElement, xml, and readyState. Ver. 1.0 Session 8 Slide 5 of 31
    6. 6. Extensible Markup LanguageXML DOM Objects and Methods (Contd.) Following are the key DOM objects: – Document – Element aIt represents all the element nodes in an XML document. – Node aThe attributes associated with the elements are – NodeList considered to be the properties of the elements – Attr rather than their child elements. – Text aSome of the methods of this object are – CDataSection also inherited from the Node object. aSome of the methods provided by this object – ParseError are getAttribute(), getElementsByTagName(), normalize(), and removeAttributeNS(). Ver. 1.0 Session 8 Slide 6 of 31
    7. 7. Extensible Markup LanguageXML DOM Objects and Methods (Contd.) Following are the key DOM objects: – Document – Element – Node It represents a single node in the XML document tree structure. – NodeList It provides methods to work with child elements. – Attr Some of the methods of this object are – Text appendChild(newChild), insertBefore(newNode,refNode), – CDataSection and removeChild(nodeName). – ParseError Ver. 1.0 Session 8 Slide 7 of 31
    8. 8. Extensible Markup LanguageXML DOM Objects and Methods (Contd.) Following are the key DOM objects: – Document – Element – Node – NodeList  It provides a list of nodes present in an XML document for manipulation. – Attr  This object enables you to iterate through a – Text collection of nodes. – CDataSection  Some of the method of this object are item() and nextNode(). – ParseError Ver. 1.0 Session 8 Slide 8 of 31
    9. 9. Extensible Markup LanguageXML DOM Objects and Methods (Contd.) Following are the key DOM objects: – Document – Element – Node – NodeList – Attr It represents an attribute of the Element object. – Text It is also a Node and inherits various attributes – CDataSection and methods of Node object. – ParseError An attribute is not considered by the DOM to be a child node of an element, but rather a property. Ver. 1.0 Session 8 Slide 9 of 31
    10. 10. Extensible Markup LanguageXML DOM Objects and Methods (Contd.) Following are the key DOM objects: – Document – Element – Node – NodeList – Attr It represents the text inside an XML element – Text in – CDataSection the node tree. The splitText() method is associated with – ParseError this object. Ver. 1.0 Session 8 Slide 10 of 31
    11. 11. Extensible Markup LanguageXML DOM Objects and Methods (Contd.) Following are the key DOM objects: – Document – Element – Node – NodeList – Attr – Text It represents the CDATA sections in the node – CDataSection tree. – ParseError This node is used to escape the parts of text that normally would be recognized as markup. Ver. 1.0 Session 8 Slide 11 of 31
    12. 12. Extensible Markup LanguageXML DOM Objects and Methods (Contd.) Following are the key DOM objects: – Document – Element – Node – NodeList – Attr – Text – CDataSection – ParseError It returns information about the most recent parse error. It provides properties to retrieve information, such as the error code, the error text, and the line that caused the error. Some of the properties of this object are errorCode, reason, line, and srcText. Ver. 1.0 Session 8 Slide 12 of 31
    13. 13. Extensible Markup LanguageXML DOM Objects in Scripts The DOM objects can be used within scripting languages such as JavaScript and VBScript. Using DOM objects in scripts allow dynamically applying a style sheet to an XML document. The code for using DOM objects for accessing an XML document needs to be used as an HTML page. Ver. 1.0 Session 8 Slide 13 of 31
    14. 14. Extensible Markup LanguageValidating an XML Document Against an XML Schema Using DOM DOM: Used to validate XML documents against XML schemas. Ensures proper grammar and proper formation of the XML document. • DOMDocument object: Main object in a DOM. Represents the top node in every document tree. Used to load an XML document, parse it, and validate it. • XMLSchemaCache object: Loads the schema document associated with the XML document. Ver. 1.0 Session 8 Slide 14 of 31
    15. 15. Extensible Markup LanguageAccessing an XML Document by Using the XMLSchemaCache Object • Used to hold a collection of schema documents that specifies the rules to which XML documents must conform. • Following table describes some methods provided by the XMLSchemaCache object. Method Description add(namespaceURI, This method adds a new schema to the collection and also variable) associates the specified namespaceURI with the schema. addCollection(XMLSch This method adds schemas from other schema collections. emaCollection It also ensures that the namespaceURIs of the different object) schemas do not clash. get(namespaceURI) This method returns a node that contains the <schema> element. namespaceURI(index This method returns the namespace that is associated with number) the schema at the specified index number. remove(namespaceURI) This method removes a schema from a collection. Ver. 1.0 Session 8 Slide 15 of 31
    16. 16. Extensible Markup LanguageValidating an XML Document Against the Schema To write a script that validates an XML document against the schema, you need to follow the given tasks: 1. Create the user interface to accept the name of the XML document and the XML schema. 2. Write the code to load the XML document. 3. Write the code to add the XML schema in the XMLSchemaCache object. 4. Write the code to validate the XML document against the schema. Ver. 1.0 Session 8 Slide 16 of 31
    17. 17. Extensible Markup LanguageDemo: Validating an XML Document Problem Statement:  The head office of CyberShoppe receives data in the form of XML documents from its branches. In order to ensure the consistency of data sent by the branches, the head office maintains the definitions for the structures of documents in schemas. After receiving data from the branches, the head office needs to verify that the data conforms to the schema of the respective document. For this, the head office needs to write a script that validates the data stored in an XML document against a schema. You will initially do the testing for the product.xml file. Ver. 1.0 Session 8 Slide 17 of 31
    18. 18. Extensible Markup LanguageApplying a Style Sheet to an XML Document • Style sheet object that passes into the transformNode method needs to be recompiled every time the method is called. • Compiling a style sheet means setting all its template rules in an executable state. • Using the XSLTemplate object and the XSLProcessor object to perform transformation facilitates the following: Reduction of overheads Increase in the performance of an XSLT application Ver. 1.0 Session 8 Slide 18 of 31
    19. 19. Extensible Markup LanguageThe XSLTemplate Object Is a DOM object that is used to access an XSLT style sheet. Used to hold a cached style sheet that can then be dynamically associated with an XML document. Before a style sheet document can be applied to an XML document, it is converted into a tree structure by the parser. XSLT tree structure is loaded into the memory of the computer and used to process the XML document. Ver. 1.0 Session 8 Slide 19 of 31
    20. 20. Extensible Markup LanguageThe XSLProcessor Object (Contd.) • Used to apply a style sheet to an XML document and then process that document. • Applies the given XSLT document to a specific XML document. • Transforms an XML document by using the XSLT style sheet. • JavaScript code to create an XSLProcessor object is as follows: var xslprocobj= xsltobj.createProcessor(); Ver. 1.0 Session 8 Slide 20 of 31
    21. 21. Extensible Markup LanguageDemo: Applying a Style Sheet to an XML Document During Run Time Problem Statement: CyberShoppe sells its products through an e-commerce Web site. Product details, such as product name, description, price, and quantity, need to be displayed. A customer can choose to view the product details either as a table or as a bulleted list. Ver. 1.0 Session 8 Slide 21 of 31
    22. 22. Extensible Markup LanguageExercises Problem Statement:  The following XML document, customer.xml contains customer details: <?xml version="1.0"?> <CUSTOMER> <CUSTOMERNAME>Harold Johnson</CUSTOMERNAME> <ADDRESS>56, Regent Road</ADDRESS> <CITY>London</CITY> <COUNTRY>UK</COUNTRY> <PHONE>444-425-2355</PHONE> </CUSTOMER> Create a Web page that accepts the name of the XML file in a text box. When you click the Submit hyperlink, a JavaScript code should load the XML document and extract the CUSTOMERNAME element. The address and phone number should be changed to 94, McFarlane Avenue and 412-233-2344, respectively, by using XML DOM objects. Ver. 1.0 Session 8 Slide 22 of 31
    23. 23. Extensible Markup LanguagePractice Questions • Which of the following methods of the DOMDocument object will you use to create an element node that has a namespace prefix associated with it? a. createElement() b. createTextNode() c. createNode() d. createAttribute() Answer: c. createNode() Ver. 1.0 Session 8 Slide 23 of 31
    24. 24. Extensible Markup LanguagePractice Questions • You have written a script to load an XML document and validate it against a schema. Which of the following properties of the DOMDocument object will you use to ensure that the script waits till the XML document is loaded before executing the rest of the code? a. async b. readyState c. documentElement d. xml Answer: a. async Ver. 1.0 Session 8 Slide 24 of 31
    25. 25. Extensible Markup LanguagePractice Questions • Which of the following properties of the IXMLDOMNode object will you use to return the text associated with a node? a. nodeName b. xml c. nodeType d. nodeValue Answer: d. nodeValue Ver. 1.0 Session 8 Slide 25 of 31
    26. 26. Extensible Markup LanguagePractice Questions • Which of the following properties of the IXMLDOMParseError object will you use to retrieve the string containing the line that caused an error while parsing an XML document? a. srcText b. linePos c. reason d. line Answer: a. srcText Ver. 1.0 Session 8 Slide 26 of 31
    27. 27. Extensible Markup LanguagePractice Questions Which one of the following is an object that represents the complete XML document map? a. IXMLDOMNode b. DOMDocument c. IXMLDOMNodeList d. IXMLDOMParseError Answer: b. DOMDocument Ver. 1.0 Session 8 Slide 27 of 31
    28. 28. Extensible Markup LanguageSummary In this session, you learned that:  The XMLSchemaCache object is used to associate an XML document with an XSD document.  The XMLSchemaCache object is used to hold a collection of schema documents that specifies the rules to which XML documents must conform.  The XSLTemplate object is used to access an XSLT style sheet.  The XSLProcessor object is used to apply style sheets on a given XML document.  The XSLProcessor object is created using the createProcessor() method.  The XSLProcessor object is associated with an XML document by using the input property of the XSLProcessor object. Ver. 1.0 Session 8 Slide 28 of 31
    29. 29. Extensible Markup LanguageSummary (Contd.)  The XSLProcessor object provides the transform() method to transform an XML document according to the information provided in an XSLT style sheet.  DOM is an application-programming interface that allows an application to access the contents of an XML document.  DOM objects allow you to access and manipulate XML documents.  The MSXML parser loads an XML document and creates a tree structure that represents the various components of the XML document.  The basic building block of the tree structure is a node. A node is a container that holds information about the elements, attributes, and content stored in an XML document. Ver. 1.0 Session 8 Slide 29 of 31
    30. 30. Extensible Markup LanguageSummary (Contd.) Some DOM objects that are used to manipulate data in a document are:  Document  Element  Node  NodeList  Attr  Text  CDataSection  ParseError  The Document object is the top-level object in the XML DOM. This object provides various properties and methods that help you to navigate, query, and modify the content and structure of XML documents.  The Element object represents all the element nodes in a document. Ver. 1.0 Session 8 Slide 30 of 31
    31. 31. Extensible Markup LanguageSummary (Contd.)  The Node object represents a node in the XML document structure. This object provides methods to work with the child elements.  The NodeList object allows you to iterate through a collection of nodes.  The Attr object represents an attribute of an Element object.  The Text object represents the text inside an XML element in the node tree.  The ParseError object returns information about the most recent parse error. Ver. 1.0 Session 8 Slide 31 of 31

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