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Questions and Answers
What is the primary purpose of XML?
What is the primary purpose of XML?
Which of the following statements is true regarding XML rules?
Which of the following statements is true regarding XML rules?
In what scenarios is XML commonly used?
In what scenarios is XML commonly used?
How should attribute values be represented in XML?
How should attribute values be represented in XML?
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What is a characteristic of XML that aids in data interchange?
What is a characteristic of XML that aids in data interchange?
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When reading an XML file, what is a requirement for filtering food items?
When reading an XML file, what is a requirement for filtering food items?
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What is meant by XML being self-descriptive?
What is meant by XML being self-descriptive?
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Which element must be present in every valid XML document?
Which element must be present in every valid XML document?
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Study Notes
Course Information
- Course: BSc (Hons) Software Engineering
- Module Name: Web Service Development
- Module Code: WAT 2104C
- University: University of Technology, Mauritius
- Semester: November 2024
XML and XML Schema & XML Parsers
- Topics to cover: Reading XML, XML Validation, Parsing XML into Objects, Modifying XML, Advanced Filtering
XML - Short Introduction
- XML stands for eXtensible Markup Language
- Designed for storing and transporting data
- Human- and machine-readable
- Self-descriptive using tags
- Platform-independent and language-neutral
- Commonly used in web services, configuration files, and data storage
XML Files
- Start with an optional declaration line (e.g.,
<?xml version="1.0" encoding="UTF-8"?>) - Example XML files (lunch menu): Include different food items, price, description, and calories
XML Rules
- Case-sensitive:
<name>and<Name>are different - Closing tags: Each opening tag must have a matching closing tag
- Root element: XML files require a single root element
- Attribute values: Attribute values must be quoted
Reading XML
- Exercise 1: Read and extract data (food items, price, descriptions, calories) from inline XML
- Exercise 2: Read data from a file, print only food items with calories below 320
XML Validation
- Step 1: Create and save an XSD file outlining XML structure and data types
- Step 2: Load the XSD file using
XmlReaderandXmlReaderSettings - Step 3: Validate XML data against the XSD
- Error handling if data doesn't comply to XSD
- Create an XSD file that restricts values based attributes
Parsing XML into Objects
- Create C# class
Ticketmatching XML structure (type, fare, zone, time restriction) - Parse data from XML elements into Ticket objects
- Additional task: Include
discountproperty in class
Modifying XML Data
- Add new entries
- Modify existing entries
- Remove entries based on conditions
- Save updated XML to a file
Advanced Filtering
- Filter XML elements based on specific criteria (price, description, minimum height, etc.)
- Use XPath queries for selecting elements meeting criteria
- Extract specific data based on conditions from XPath queries
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Description
Test your knowledge on XML and XML Schema, focusing on concepts such as reading, validating, and parsing XML. Explore the rules and structures of XML files and their practical applications in web services and data storage. This quiz is designed for students in the BSc (Hons) Software Engineering course.
