XML and XML Schema Definition in Easy Steps

Get an overview of the course structure, sections and quizzes, with an easy software setup at the beginning, and learn XML and XML schema definition through active practice and discussions.

Explore the concepts of XML, including what it is, why it is popular, and when to use it, and learn to create an XML document using the Eclipse IDE.

Learn how XML enables you to create custom markup without predefined elements, and structure data for ecommerce orders or news, enabling easy data exchange.

Discover the advantages of XML, including custom markup, carrying data and metadata, and enforcing well-formedness and schema validation to enable seamless cross-application data exchange.

Use XML for data exchange, configuration files, and saving, manipulating, and presenting data. XML carries data and metadata and can be validated, with SOAP, REST, and RPC underlying these exchanges.

discover how XML processors read XML documents, verify well-formedness and validation, and how XML parsers adapt XML for languages like Java and Python.

Learn to create an XML document using the Eclipse IDE by building a HelloXML project, adding an Hello.xml file, and defining a greeting root with a hello element.

Learn to craft an xml document from scratch in this hands-on section, creating a driver's license xml using elements, attributes, entities, and comments.

Design an XML document for a drivers license use case, detailing fields such as license number, first name, last name, birth date, vehicle type, issue date, and expiry date.

Learn the xml declaration and prolog, including the default line Eclipse generates, and understand the version attribute (version 1.0) used in xml documents.

Learn how to use the encoding attribute in the XML declaration to specify the document's character set. UTF-8 is the default, with alternatives like UTF-16 and Shift_JIS.

Learn about the standalone attribute in the XML declaration and its effect on the parser. It can be yes or no; default is no, permitting external documents like XML schema.

Learn to define a root element in XML, with correct start/end tags, case sensitivity, and valid characters, and validate with Eclipse to fix well-formedness errors.

Create a drivers license XML by adding child elements under the DriversLicense root for Number, FirstName, LastName, DateOfBirth, VehicleType, DateOfIssue, and ExpiryDate, using sample values such as 12345.

Describe how attributes qualify XML elements, using a Photo location attribute with server name, IP address, or filename. Show that attributes are name-value pairs that add meaning without holding data.

Identify empty elements in XML, such as Photo in drivers license data, with no text or children, using attributes like location; close them with an end tag or self-closing syntax.

Learn how XML comments state the document's purpose and describe elements and attributes, using the <!-- ... --> syntax, and how to temporarily comment out elements for configuration.

Learn about predefined XML entities and how to safely include special characters in XML by using codes such as &lt;, &gt;, &amp;, &quot;, and &apos;.

Learn how to use CDATA blocks to include any text in an XML document without parsing issues. Use CDATA for examples, case-specific snippets, and avoid nesting blocks.

Demonstrate nested elements in xml by adding an address with street, city, state, country, and zipcode under the DriversLicense root, illustrating multi-level hierarchies in a hierarchical document.

Review well-formedness rules for XML documents, ensuring a single root element, proper nesting and closing tags, case sensitivity, quoted attribute values, and empty-element shorthand.

Explore how XML schema files validate exchanged XML, learn what a schema file is and why we need it, and how to create one with different types.

Learn how an XML schema definition provides the grammar for an XML document, specifying elements, attributes, namespaces, element order, occurrences, and value restrictions to ensure validity.

Describe how XML schema acts as a contract between XML users, defining allowed elements and attributes to ensure valid data and proper configuration files.

Learn the three XML schema types: inbuilt types defined by the W3C, simple types created by restricting these, and complex types that contain other elements, with hands-on examples to come.

Work through a hands-on use case to create an XML schema file from scratch, using the built-in W3C XML schema datatypes.

Create an XML schema as a contract to exchange patient data between the financials and clinical applications, validating name, age, email, gender, and telephone, with room for future requirements.

Explore the XML schema inbuilt datatypes to constrain element and attribute values, including numeric types like byte, short, int, long, decimal, and string, enabling simple and complex types.

Apply inbuilt data types to XML fields by assigning name to string, age to int, email to string, gender as string for now, and phone number to string, preparing schemas.

Learn how namespaces uniquely identify xml elements and attributes, define a target namespace with a unique company url, and use prefixes like amz or ebay to qualify elements.

Open the Eclipse IDE, create a PatientSchema project, and add a Patient.xsd schema file. Define the root schema with xmlns and a target namespace bharaththippireddy.com using the tns prefix.

Create a root element and a complexType named Patient, then define a sequence of elements such as name, age, email, gender, and phone in the xml schema.

Generate an XML document from a schema in Eclipse, then validate it against the schema to verify the target namespace, namespaces with tns, and element order.

Learn to create an XML schema file and use inbuilt types, then apply simple types and restrict the values of XML elements.

Define a simpleType named String15Chars derived from the string base type, restrict it with maxLength 15, and apply it to the name element, validating in Eclipse.

Create a simpleType named Gender; apply a restriction with enumeration derived from string to enforce the values M or F in the patient xml.

Create and nest complex types, include attributes, and control the order and repetition of elements in an XML document.

Explore modeling payment information in XML by defining schema elements for cash or insurance, capturing provider and limit, and controlling element order within a complex type.

Define a PaymentType complex type using the XML schema choice to include either cash (decimal) or insurance (complex with limit and provider).

Define a complex type Insurance using xsd:all, with provider as string and limit as decimal, and note that all elements occur at least once regardless of order.

Learn how to embed complex types inside other complex types using XML schema constructs like xsd choice and xsd all, defining paymentType within patient sequences and referencing insurance type.

Learn to control element occurrences in XML schema using minOccurs, maxOccurs and unbounded, making email optional and enabling multiple phone numbers in complex types.

create an xml file from the schema and validate it, demonstrating xsd sequence, choice, and all, and how provider and limit are required for insurance.

Explore how elementFormDefault in XML schema controls namespace qualification of elements and compare unqualified versus qualified settings in the XML document.

Explore how attributes add meaning to XML data, learn to define attributes in a schema file, and restrict attribute values with a simple type.

Add a new id attribute to the patient element using the XML schema attribute element, defined by the XML schema namespace or W3C specification, with an inbuilt integer type.

Make attributes required in XML Schema by using the use attribute with the value required, and learn how the default optional setting affects validation in patient.xml.

Create a new simpleType named id with an int base and apply a pattern (0-9)* to restrict the id attribute values to digits, referenced as tns:Id.

Recap xml namespaces and show how to use xml schema include and import to incorporate one schema file into another.

Recap how namespaces qualify elements in XML schemas and use a target namespace with a domain name. Define a prefix to qualify elements and enable include and import across schemas.

Move complex types to a separate schema file using xsd:include, align namespaces, and update Patient.xsd to include the new PaymentType for a cleaner, maintainable xml schema.

Learn how to import elements from different namespaces into XML schemas using import, create a shared Common.xsd for reusable ids, define a namespace prefix, and apply it in Patient.xsd.