Cascading Style Sheets, Level 2 - World Wide Web Consortium

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Document language The encoding language of the source document (e.g., HTML or an XML application). Element (An SGML term, see [ISO8879].) The primary syntactic constructs of the document language. Most CSS style sheet rules use the names of these elements (such as "P", "TABLE", and "OL" for HTML) to specify rendering information for them. Replaced element An element for which the CSS formatter knows only the intrinsic dimensions. In HTML, IMG, INPUT, TEXTAREA, SELECT, and OBJECT elements can be examples of replaced elements. For example, the content of the IMG element is often replaced by the image that the "src" attribute designates. CSS does not define how the intrinsic dimensions are found. Intrinsic dimensions The width and height as defined by the element itself, not imposed by the surroundings. In CSS2 it is assumed that all replaced elements -- and only replaced elements -- come with intrinsic dimensions. Attribute A value associated with an element, consisting of a name, and an associated (textual) value. Content The content associated with an element in the source document; not all elements have content in which case they are called empty. The content of an element may include text, and it may include a number of sub-elements, in which case the element is called the parent of those sub-elements. Rendered content The content of an element after the rendering that applies to it according to the relevant style sheets has been applied. The rendered content of a replaced element [p. 30] comes from outside the source document. Rendered content may also be alternate text for an element (e.g., the value of the HTML "alt" attribute), and may include items inserted implicitly or explicitly by the style sheet, such as bullets, numbering, etc. Document tree The tree of elements encoded in the source document. Each element in this tree has exactly one parent, with the exception of the root element, which has none. Child An element A is called the child of element B if an only if B is the parent of A. Descendant An element A is called a descendant of an element B, if either (1) A is a child of B, or (2) A is the child of some element C that is a descendant of B. Ancestor An element A is called an ancestor of an element B, if and only if B is a descendant of A. Sibling An element A is called a sibling of an element B, if and only if B and A share the same parent element. Element A is a preceding sibling if it comes before B in the document tree. Element B is a following sibling if it comes after B in the document tree. 30
Preceding element An element A is called a preceding element of an element B, if and only if (1) A is an ancestor of B or (2) A is a preceding sibling of B. Following element An element A is called a following element of an element B, if and only if B is a preceding element of A. Author An author is a person who writes documents and associated style sheets. An authoring tool generates documents and associated style sheets. User A user is a person who interacts with a user agent to view, hear, or otherwise use a document and its associated style sheet. The user may provide a personal style sheet that encodes personal preferences. User agent (UA) A user agent is any program that interprets a document written in the document language and applies associated style sheets according to the terms of this specification. A user agent may display a document, read it aloud, cause it to be printed, convert it to another format, etc. Here is an example of a source document encoded in HTML: My home page My home page Welcome to my home page! Let me tell you about my favorite composers: Elvis Costello Johannes Brahms Georges Brassens This results in the following tree: HTML HEAD BODY TITLE H1 P UL LI LI LI According to the definition of HTML, HEAD elements will be inferred during parsing and become part of the document tree even if the HEAD tags are not in the document source. Similarly, the parser knows where the P and LIs end, even though there are no and tags in the source. 31
Page 1 and 2: REC-CSS2-19980512 Cascading Style S
Page 3 and 4: Quick Table of Contents 1 About the
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 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
Page 53 and 54: Contents 5 Selectors 5.1 Pattern ma
Page 55 and 56: 5.2 Selector syntax A simple select
Page 57 and 58: 5.6 Child selectors A child selecto
Page 59 and 60: Example(s): The following rule hide
Page 61 and 62: H1#chapter1 { text-align: center }
Page 63 and 64: Example(s): The following rule sets
Page 65 and 66: 5.11.4 The language pseudo-class: :
Page 67 and 68: The following CSS2 will make a drop
Page 69 and 70: 6 Assigning property values, Cascad
Page 71 and 72: BODY { font-size: 10pt } H1 { font-
Page 73 and 74: 6.4.1 Cascading order To find the v
Page 75: author style sheet and may be overr
Page 78 and 79: 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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Long distance calls $1.30 $2.50 $10
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In the separated borders model, thi
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The following example illustrates t
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solid The border is a single line s
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224.00 90.00 379.02 Seattle 27-
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Contents 18 User interface 18.1 Cur
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CaptionText Text in caption, size b
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Value: | invert | inherit Initial:
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Contents 19 Aural style sheets 19.1
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Another speech browser is being use
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19.5 Cue properties: ’cue-before
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Example(s): BLOCKQUOTE.sad { play-d
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elow Same as ’-90deg’. level Sa
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Values have the following meanings:
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none Punctuation is not to be spoke
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Appendix A. A sample style sheet fo
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Contents Appendix B. Changes from C
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Appendix C. Implementation and perf
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Multiple Master Font A Multiple Mas
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C.2 Font retrieval There are many d
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Stroke Variation Any (0) No Fit (1)
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to convert the information in a Tru
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Block Add Block name Unicode range
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307
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Contents Appendix D. The grammar of
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* after the "#"; e.g., "#000" is OK
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Contents Appendix E. References E.1
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[YACC] "YACC - Yet another compiler
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Appendix F. Property index Name ’
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Name Values ’float’ [p. 111] le
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Name ’overflow’ [p. 145] Values
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Appendix G. Descriptor index Name V
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:active, 294, 63 :after, 153, 68 :b
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’border-right-width’, 88 ’bor
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’definition-src’ (descriptor),
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hiragana-iroha, 169 horizontal marg
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message entity, 33 ’min-height’
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quad width, 44 ’quotes’, 157 RE
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’table-header-group’, 102 ’ta
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Cascading Style Sheets, Level 2 - World Wide Web Consortium

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