Several people were sick on Friday,
so we didn't meet. Please
do look at the readings and work in
the next assignment, and we'll discuss this
material next Tuesday.
more internet background info
sizes in bits
First do a bandwidth calculation :
Using the numbers from last time (gulp), how long to download a 1 hour video over a home DSL line? How big is that video file uncompressed (which is how video manipulation programs need to store it).
internet governance
Part of the "history" topic from last time.
Look up :
So ... who owns the internet?
more html, xhtml, css
Web standards and validation :
page 227 HTML version timeline ...
Discuss the notion of XML briefly.
New web page stuff :
- doctag before <html>
- meta tag for encoding
- "strict" or not
- xhtml : particularly picky
- ... but also more consistent across different browsers
- lowercase tags
- singlet tags end with />
Check out browsershots.org
Try some examples on the validator.
Mention support in "Web Developer".
Related topic: "accessibility"
New CSS stuff :
- moving it to a .css file
- inheritance : tags inside other tags use styles for outer stuff
- ... but inherited rules can be over ridden.
- css classes
- elements can be in more than one class
- tag.class syntax
And CSS can be validated, too.
W3 references for HTML, xHTML, CSS : see
resources page.
