W3C CSS2 Cascading Style Sheets, level 2 - instructional media + ...

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A list of current W3C Recommendations and other technical documents can be found at http://www.w3.org/TR. Public discussion of CSS features takes place on www-style@w3.org. Available formats The CSS2 specification is available in the following formats: HTML: http://www.w3.org/TR/1998/REC-CSS2-19980512 a plain text file: http://www.w3.org/TR/1998/REC-CSS2-19980512/css2.txt, HTML as a gzip’ed tar file: http://www.w3.org/TR/1998/REC-CSS2-19980512/css2.tgz, HTML as a zip file (this is a ’.zip’ file not an ’.exe’): http://www.w3.org/TR/1998/REC-CSS2-19980512/css2.zip, as well as a gzip’ed PostScript file: http://www.w3.org/TR/1998/REC-CSS2-19980512/css2.ps.gz, and a PDF file: http://www.w3.org/TR/1998/REC-CSS2-19980512/css2.pdf. In case of a discrepancy between the various forms of the specification, http://www.w3.org/TR/1998/REC-CSS2-19980512 is considered the definitive version. Available languages The English version of this specification is the only normative version. However, for translations in other languages see http://www.w3.org/Style/css2-updates/translations.html. Errata The list of known errors in this specification is available at http://www.w3.org/Style/css2-updates/REC-CSS2-19980512-errata.html. Please report errors in this document to css2-editors@w3.org. 2
Quick Table of Contents 1 About the CSS2 Specification . . . . . . . . . . 13 . 2 Introduction to CSS2 . . . . . . . . . . . . 21 . 3 Conformance: Requirements and Recommendations . . . . 29 . 4 CSS2 syntax and basic data types . . . . . . . . . 35 . 5 Selectors . . . . . . . . . . . . . . . 53 . 6 Assigning property values, Cascading, and Inheritance . . . . 69 . 7 Media types . . . . . . . . . . . . . . 77 . 8 Box model . . . . . . . . . . . . . . . 81 . 9 Visual formatting model . . . . . . . . . . . 95 . 10 Visual formatting model details . . . . . . . . . 131 . 11 Visual effects . . . . . . . . . . . . . . 145 . 12 Generated content, automatic numbering, and lists . . . . 153 . 13 Paged media . . . . . . . . . . . . . . 175 . 14 Colors and Backgrounds . . . . . . . . . . . 187 . 15 Fonts . . . . . . . . . . . . . . . . 195 . 16 Text . . . . . . . . . . . . . . . . 237 . 17 Tables . . . . . . . . . . . . . . . 245 . 18 User interface . . . . . . . . . . . . . 271 . 19 Aural style sheets . . . . . . . . . . . . . 277 . Appendix A. A sample style sheet for HTML 4.0 . . . . . . 291 . Appendix B. Changes from CSS1 . . . . . . . . . 293 . Appendix C. Implementation and performance notes for fonts . . . 295 . Appendix D. The grammar of CSS2 . . . . . . . . . 309 . Appendix E. References . . . . . . . . . . . . 313 . Appendix F. Property index . . . . . . . . . . . 317 . Appendix G. Descriptor index . . . . . . . . . . 323 . Appendix H. Index . . . . . . . . . . . . . 325 . 3
Page 1: REC-CSS2-19980512 Cascading Style S
Page 5 and 6: 4.3.4 URL + URN = URI . . . . . . .
Page 7 and 8: 9.7 Relationships between ’displa
Page 9 and 10: cursive . . . . . . . . . . . . . 2
Page 11: B.1 New functionality . . . . . . .
Page 14 and 15: Section 2: An introduction to CSS2
Page 16 and 17: Initial This part specifies the pro
Page 18 and 19: The section on Paged Media was in l
Page 21 and 22: Contents 2 Introduction to CSS2 2.1
Page 23 and 24: CSS2 has more than 100 different pr
Page 25 and 26: Adding more rules to the style shee
Page 27: Simplicity. CSS2 is more complex th
Page 30 and 31: Document language The encoding lang
Page 32 and 33: 3.2 Conformance This section define
Page 35 and 36: Contents 4 CSS2 syntax and basic da
Page 37 and 38: Macro Definition ident name nmstart
Page 39 and 40: In fact, these two methods may be c
Page 41 and 42: P[example="public class foo\ {\ pri
Page 43 and 44: A user agent conforming to a future
Page 45 and 46: 0.28 mm 1.4 mm viewer 28 inch 71 cm
Page 47 and 48: Example(s): An example without quot
Page 49 and 50: Values outside the device gamut sho
Page 51 and 52: When a style sheet resides in a sep
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Contents 5 Selectors 5.1 Pattern ma
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5.2 Selector syntax A simple select
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5.6 Child selectors A child selecto
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Example(s): The following rule hide
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H1#chapter1 { text-align: center }
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Example(s): The following rule sets
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5.11.4 The language pseudo-class: :
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The following CSS2 will make a drop
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6 Assigning property values, Cascad
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BODY { font-size: 10pt } H1 { font-
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6.4.1 Cascading order To find the v
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author style sheet and may be overr
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Link to a target medium The bo
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Relationship between media groups a
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Top TM TB TP Margin (Transparent) B
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First element of list Second elemen
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Value: {1,4} | inherit Initial: not
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values, they apply to the top, righ
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’border-color’ Value: {1,4} | t
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Since the initial value of the bord
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Contents 9 Visual formatting model
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9.2 Controlling box generation The
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The P generates a block box, with s
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The properties of the run-in elemen
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Value: static | relative | absolute
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The offset is a fixed distance from
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or like this: Several emphasized wo
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IMG { float: left } BODY, P, IMG {
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image margin paragraph border parag
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Values have the following meanings
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position: fixed; width: 100%; heigh
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Document Window (0,0) (0, 400) 1 Be
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Document Window (0,0) (0, 400) 24 p
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Document Window I used two red hyph
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This text will be beneath everythi
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(U+202C) at the end of the element.
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Contents 10 Visual formatting model
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#div1 { position: absolute; left: 5
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(If the border style is ’none’,
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’max-width’ Value: Initial: App
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10.6.1 Inline, non-replaced element
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Value: Initial: Applies to: | | n
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. We recommend a computed value for
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Contents 11 Visual effects 11.1 Ove
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DIV I didn’t like the play, but t
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(0, 0) (50, 0) clip region (0, 55)
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onclick=’show("container2");hid
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12 Generated content, automatic num
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the pseudo-element will behave as i
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’block’: the pseudo-element is
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Approximate rendering ISO 10646 cod
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Value: [ ? ]+ | none | inherit Ini
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Example(s): The following style she
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first or last line box exists in a
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This is a very short document. This
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decimal Decimal numbers, beginning
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inside The marker box is the first
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OL.alpha { list-style: lower-alpha
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Contents 13 Paged media 13.1 Introd
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Sheet Page box A D Page content B C
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13.2.3 Crop marks: the ’marks’
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13.3.1 Break before/after elements:
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Value: | inherit Initial: 2 Applie
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13.4 Cascading in the page context
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Contents 14 Colors and Backgrounds
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This property sets the background i
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User agents may treat ’fixed’ a
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14.3 Gamma correction For informati
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Contents 15 Fonts 15.1 Introduction
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In the CSS2 font model, as in CSS1,
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15.2.2 Font family: the ’font-fam
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normal font. italic Specifies a fon
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1. ultra-condensed 2. extra-condens
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Specifies the aspect value. The num
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15.2.5 Shorthand font property: the
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menu The font used in menus (e.g.,
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Latin fonts Greek fonts Cyrillic fo
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page can be displayed. Progressive
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15.3.2 Descriptors for Selecting a
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15.3.3 Descriptors for Font Data Qu
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Value: [ [format( [, ]*)] | ] [,
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’stemv’ (Descriptor) Value: In
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the extras are ignored. [p. 42] Exa
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Swiss 721 light Swiss 721 Swiss 721
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The ideal solution would be to have
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15.4.11 Lower Baseline This gives t
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15.4.19 Vertical stem width This is
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The per-descriptor matching rules f
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The next example defines a family o
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Contents 16 Text 16.1 Indentation:
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16.3.1 Underlining, overlining, str
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Example(s): Consider this example:
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This property controls capitalizati
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Contents 17 Tables 17.1 Introductio
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other document languages (such as X
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’table-footer-group’) element T
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caption’s margin caption caption
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current margins text text text prev
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cells rows row groups columns colum
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The two algorithms are described be
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percentage values of ’height’ r
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The lengths specify the distance th
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order−width padding padding borde
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An example of a table with collapse
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Each document language may have dif
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270
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help Help is available for the obje
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18.3 User preferences for fonts As
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Example(s): For example, to draw a
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spatial audio), and paragraphs of c
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Value: | | inherit Initial: depen
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Example(s): The following two rules
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far-right Same as ’60deg’. With
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fast Same as 300 words per minute.
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Values have the following meanings:
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290
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SUB { vertical-align: sub } SUP { v
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Dynamic outlines [p. 274] . B.2 Upd
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the native font format on the Amiga
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TrueDoc TrueDoc technology was deve
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Square Cove (4) Obtuse Square Cove
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XHeight Standard/Serifed (4) High/T
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Block Add Block name Unicode range
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This table suggests where such info
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308
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pseudo_page : ’:’ IDENT ; font_
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{num}rad {num}grad {num}ms {num}s {
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[RFC1808] "Relative Uniform Resourc
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[RFC1630] "Universal Resource Ident
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Name ’border-top-width’ [p. 88]
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Name ’list-style-type’ [p. 168]
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Name ’speech-rate’ [p. 285] Val
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Name Values Initial value ’mathli
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’ascent’ (descriptor), 222 aspe
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close-quote, 159, 155 collapsing ma
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font family, 198 font set, 199 font
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definition of, 43 ’letter-spacing
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page model, 175 page selector, 176
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simple selector, 55 ’size’, 177
Page 338:
valid style sheet, 29 value, 41 ver
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W3C CSS2 Cascading Style Sheets, level 2 - instructional media + ...

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