Datasheet

26
An introduction to HTML
Adobe Dreamweaver CS4 Digital Classroom
1
The color pickers in Adobe Photoshop and Illustrator also display and accept hexadecimal codes,
making it easy to copy and paste colors between these applications and Dreamweaver.
Case sensitivity and whitespace rules
HTML is a  exible language that has very few rules regarding its own appearance. Based on
how strictly you want to write it, HTML can be either very speci c about whether tags are
written in upper- or lowercase (called case sensitivity), or not speci c at all. To see how HTML
treats whitespace, follow these steps.
1 Choose File > Open. When the Open dialog box appears, navigate to the dw01lessons
folder. Select the Whitespace.html  le, then press Open.
2 If your  le is not in Split view, press the Split button ( ) in the Document toolbar, so
that you can view both the layout and the code. Notice three seemingly identical tags
beneath line 9 in your code:
All these tags are valid, even though they have very di erent case structures.
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