COAP:COAP-2100/week3-2011
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Week 3
Topics Covered
- Valid HTML
- Why is valid code important ?
- Validation strategies
Teaching materials
Classroom activities
- Monday
We will look at three kinds of validation tools:
- Various online services, in particular the W3C Quality Assurance Tools
- Using browser extensions in Firefox
- Using validation tools in your web authoring system
There are several types of validation tools:
- HTML/XHTML validation
- CSS validation
- Links checking (are they broken ?)
- Accessibility checking (can impaired people use the web site)
The W3C Quality Assurance Tool set includes several tools
- http://validator.w3.org/ (Markup Validation Service)
- You can enter a URL, upload file or directly copy/paste code
- Supported formats (Sept 2009): HTML, XHTML, SMIL, MathML
- http://validator.w3.org/checklink (W3C Links Checker)
- http://jigsaw.w3.org/css-validator/ (on line CSS validation service)
- URL validation: You can enter either an HTML/XHTML URL or just a CSS
- Alternatively you can upload a CSS file (and pick the CSS profile).
- Other tools, e.g. a Feed validator are available from the Quality page ...
Using web browser development tools
- Use of HTML Validator (install it if you didn't do it on week2). Basically you just go View-Source and look at the errors.
Using Tidy inside NoteTab light
- This may not work (since Tidy must installed on your computer)
Using the tidy program
- You can get various flavors from SourceForge