Application
This unit describes the skills and knowledge required to support web services for building distributed applications.
It applies to individuals working as software developers who have specialised skills in the consumption of web services, related communications protocols and the associated extensible markup language (XML) technologies, used in web services.
No licensing, legislative or certification requirements apply to this unit at the time of publication.
Elements and Performance Criteria
ELEMENT | PERFORMANCE CRITERIA |
Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. |
1. Use XML to provide information | 1.1 Create XML data structures from various data sources 1.2 Manipulate XML data structures, using a common application programming interface (API) 1.3 Use namespaces to scope elements from multiple XML documents 1.4 Validate XML data structures, using a schema 1.5 Map, and transform, an XML document from one schema to another |
2. Use WSDL to promote a web service | 2.1 Understand the purpose of the web service description language (WSDL) 2.2 Identify the three main elements that comprise WSDL 2.3 Build a WSDL file 2.4 Provide web access to a WSDL file, via a uniform resource locator (URL) |
3. Use UDDI to locate and retrieve information about a public web service | 3.1 Identify the purpose of universal description, discovery and integration (UDDI) 3.2 Understand the differences between public, extra-enterprise and intra-enterprise, UDDI registry deployments 3.3 Locate, and retrieve information, about a public web service using UDDI 3.4 Identify the relationship between WSDL and UDDI |
4. Access the web services using SOAP | 4.1 Identify the purpose of simple object access protocol (SOAP) 4.2 Determine the relationship between UDDI and SOAP 4.3 Identify the basic structure and processing of a SOAP message 4.4 Retrieve an XML document from a public web service, using SOAP |
5. Implement a web service | 5.1 Outline a basic web service architecture 5.2 Implement, test and publish a web service 5.3 Incorporate and test a web service into an application |
Evidence of Performance
Evidence of the ability to:
transform data from relational or other native data sources, into an extensible markup language (XML)
validate an XML document, using a predefined schema
provide access to the business functionality via a web service description language (WSDL) file
locate a public web service business function, and include it in a website, using universal description, discovery and integration (UDDI), and a simple object access protocol (SOAP)
implement a web service according to the business requirements, specifications, and industry standards.
Note: If a specific volume or frequency is not stated, then evidence must be provided at least once.
Evidence of Knowledge
To complete the unit requirements safely and effectively, the individual must:
summarise integrated development environments
summarise web development technologies
outline the web service architecture
describe the importance of XML language and data structures.
Assessment Conditions
Gather evidence to demonstrate consistent performance in conditions that are safe and replicate the workplace. Noise levels, production flow, interruptions and time variances must be typical of those experienced in the website technologies field of work, and include access to:
the web service business requirement specifications
industry standards published by the World Wide Web Consortium (W3C)
platform-specific documentation and help files, describing the syntax and use of proprietary technologies
a simulated development environment, incorporating the following elements:
a relational database server
the integrated development environment (IDE), including related frameworks, APIs and associated proprietary classes, required to implement web services and their enabling technologies
a web server
web browsers
XML editors
XPath testing utilities.
Assessors must satisfy NVR/AQTF assessor requirements.
Foundation Skills
This section describes language, literacy, numeracy and employment skills incorporated in the performance criteria that are required for competent performance.
Skill | Performance Criteria | Description |
Reading | 1.1, 1.3-1.5, 2.2, 3.1, 3.3, 3.4, 4.1-4.3 | Reads and interprets specifications, computer program data, and other documentation, from a variety of sources, and consolidates information to determine requirements |
Writing | 1.1-1.5, 2.3, 2.4, 4.3, 4.4, 5.1, 5.2 | Develops clear and well-organised specifications, and related workplace documentation, for specific audiences using the appropriate language to convey explicit information |
Navigate the world of work | 2.1, 3.2, 4.2 | Ensures that knowledge of computing technologies is kept up to date in order to provide, and carry out, activities |
Get the work done | 1.2, 2.1, 2.4, 3.3, 4.4, 5.1-5.3 | Accepts responsibility for planning and sequencing complex tasks and workload, negotiating key aspects with others, and taking into account capabilities, efficiencies and effectiveness Makes critical decisions quickly and intuitively in complex situations, taking into consideration a range of variables, including the outcomes of previous decisions Applies systematic and analytical decision-making processes, for complex and non-routine situations Uses and investigates new digital technologies and applications, to manage and manipulate data, and to communicate effectively with others, in a secure and stable digital environment |
Sectors
Web