Week5 – Reviewing

This week, we focused on XHTML and CSS.

Firstly, there is the practice on week5. Click here

In fact, in Challenge Exercise, I learned the usage of ':hover pseudo-class'. I put the value :hover { color:red; text-transform:uppercase} into blog_plain.css file. The purpose is to change the color from original color to red, and text from original type to the capital letter. It's quite interesting. I thought that CSS is a useful tool when we put it to a prefect web page. It can make page as the same style, and it looks more clear and beautiful.

Secondly, after I read some books and view some web page information. I think XHTML is an XML-based HTML, and CSS just beautify it with some style sheet. On the other hand, XHTML is structured, and CSS is used to beautify XHTML in the best way. Besides, I found some difference among HTML, XHTML, CSS and CSS3. I would like to discuss with u guys.

HTML and XHTML:
Simply, XHTML is an XML based HTML. Thus, XHTML syntax requirements are more stringent than HTML in order to comply with the requirements of XML. The following lists the main changes from HTML to XHTML:
(1)Required correctly nested;
(2)Closed all of elements;
For example, html code, code for line feed
. However, in XHTML, it is necessary to write down
instead of
.
(3)Case-sensitive search;
(4)Attribute values are enclosed in double quotation marks;
(5)The ID attribute instead of the name attribute;
(6)Special character handling.

CSS VS CSS2.0 VS CSS3.0
Since the release of CSS, CSS2.0 version was released in May 1998, and the style sheet has become more perfectable. Compare with CSS, CSS2.0 was a new style sheet structure which implement by W3C. There is a totally different from CSS1.0 and CSS1.2, CSS2.0 recommendes a set of separation effect between content and performanace. HTML elements can be controlled via the CSS2.0 style. However, CSS3 provides many new methods to improve the designing work, and there are various important changes with last other version CSS style. CSS3 will be fully compatible in the future technologies. The main impact of CSS3 is to be able to use the new available selectors and attributes, so that it allow users to implement a design effort (e.g. dynamic web and gradients) simply.

If anyone has any comments, PLS let me know. :)

Cheers