<h1>Overskrift</h1>
<font size=18pt color=red>Overskrift</font>
h1 {
font-size: 16pt;
color: red;
text-align: center;
}
| GIF, PNG | private XML vocabulary |
XSL-FO | HTML | MathML | ||
|---|---|---|---|---|---|---|
| application- specific semantics? |
no | no | no | no | no | yes |
| device-independent? | no | no | no | no | yes | yes |
| roles known? | no | no | no | no | yes | yes |
| text in logical order? | unknown | unknown | no | yes | yes | yes |
| reflow possible? | no | unknown | no | yes | yes | yes |
| scalable? | no | unknown | yes | yes | yes | yes |
| text machine-readable? | no | yes | yes | yes | yes | yes |
| text human-readable? | yes | yes | yes | yes | yes | yes |
<body> <h1>Overskrift</h1> </body>
| a syntax | h1 { font-size: 12px } |
| selectors | h1 { font-size: 12px } |
| properties | h1 { font-size: 12px } |
| values and units | h1 { font-size: 12px } |
| a value propagation system | body { font-size: 12px } |
| a formatting model | Overskrift |
| 1987-1997 | FOSI |
| 1986-1996 | DSSSL |
| 1994 | P94 |
| 1993 | Robert Raisch's proposal |
| 1993 | Pei Wei's proposal |
| 1993 | Steve Heaney's proposal |
| 1994 | Cascading HTML Style Sheets |
| 1994 | Joe English's proposal |
| 1994 | Sketch of Simple Formatting Primitives |
| 1994 | DSSSL Lite |
| 1995 | Stream-based style sheet proposal |
| 1996 | PSL96 |
h1 { font-size: 20pt }
|
<e-i-c gi="h1"> <charlist> <font inherit="1" size="20pt"> </charlist> </e-i-c> |
(element h1
(make paragraph
font-size: 20pt))
|
h1: Size: 20 pt; |
The hypothesis is that the web calls for different style sheet languages than does traditional electronic publishing.
| web characteristic | corresponding requirements |
|---|---|
| later binding | stream-based style sheets |
| screen-centric publishing | screen-based properties, values and units |
| shared author/user influence | negotiation between conflicting stylistic preferences |
| multiple outputs | media-specific style sheets |
| hyperlinked documents | link styling |
| uncertain delivery | robustness |