CSS Conformance

Antenna House Formatter V7.4's CSS implementation is based on the following specifications:

[CSS 2.1] Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) (W3C Recommendation 07 June 2011)
[CSS3-Align] CSS Box Alignment Module Level 3 (W3C Working Draft, 17 February 2023)
[CSS3-Background] CSS Backgrounds and Borders Module Level 3 (W3C Recommendation 17 October 2017)
[CSS3-Box] CSS basic box model (W3C Working Draft 9 August 2007)
[CSS3-Break] CSS Fragmentation Module Level 3 (W3C Candidate Recommendation 9 February 2017)
[CSS3-Color] CSS Color Module Level 3 (W3C Proposed Recommendation 15 March 2018)
[CSS3-Content] CSS Generated Content Module Level 3 (W3C Working Draft 2 June 2016)
[CSS3-CounterStyles] CSS Counter Styles Level 3 (W3C Candidate Recommendation 14 December 2017)
[CSS3-FlexBox] CSS Flexible Box Layout Module Level 1 (W3C Candidate Recommendation 19 November 2018)
[CSS3-Fonts] CSS Fonts Module Level 3 (W3C Candidate Recommendation 15 March 2018)
[CSS3-GCPM] CSS Generated Content for Paged Media Module (W3C Working Draft 13 May 2014)
[CSS3-Grid] CSS Grid Layout Module Level 2 (W3C Candidate Recommendation Draft 18 December 2020)
[CSS3-Images] CSS Image Values and Replaced Content Module Level 3 (W3C Candidate Recommendation 17 April 2012)
[CSS3-Inline] CSS Inline Layout Module Level 3 (W3C Working Draft 8 August 2018)
[CSS3-Line] CSS3 module: line (W3C Working Draft 15 May 2002)
[CSS3-Lists] CSS Lists and Counters Module Level 3 (W3C Working Draft 20 March 2014)
[CSS3-Logical] CSS Logical Properties and Values Level 1 (W3C Working Draft 27 August 2018)
[CSS3-Multicol] CSS Multi-column Layout Module Level 1 (W3C Working Draft 5 October 2017)
[CSS3-Namespaces] CSS Namespaces Module Level 3 (W3C Recommendation 29 September 2011, edited in place 20 March 2014)
[CSS3-Page] CSS Paged Media Module Level 3 (W3C Working Draft 18 October 2018)
[CSS3-Ruby] CSS Ruby Layout Module Level 1 (W3C Working Draft 5 August 2014)
[CSS3-Selectors] Selectors Level 3 (W3C Candidate Recommendation 30 January 2018)
[CSS4-Selectors] Selectors Level 4 (W3C Working Draft 11 November 2022)
[CSS3-Text] CSS Text Module Level 3 (W3C Working Draft 22 August 2017)
[CSS3-TextDecor] CSS Text Decoration Module Level 3 (W3C Candidate Recommendation 1 August 2013)
[CSS3-Transforms] CSS Transforms Module Level 1 (W3C Working Draft 30 November 2017)
[CSS3-UI] CSS Basic User Interface Module Level 3 (W3C Proposed Recommendation 14 December 2017)
[CSS3-Values] CSS Values and Units Module Level 3 (W3C Candidate Recommendation 29 September 2016)
[CSS3-WritingModes] CSS Writing Modes Module Level 3 (W3C Candidate Recommendation 7 December 2017)
[CSS3-CustomProperties] CSS Custom Properties for Cascading Variables Module Level 1 (W3C Candidate Recommendation 3 December 2015)

Many of CSS3/CSS4 specifications are still under the draft or the state before draft. Although the specifications above are linked to the versions based on the Antenna House Formatter V7.4 implementation, Antenna House Formatter V7.4 does not implement them perfectly. Each property in this document includes the link to the specification that is the base of the implementation. ([CSS3-GCPM] etc. written at the beginning is an abbreviated name when referring to the specification.)

[yes] in the list means that the formatting object or property is implemented.
[partial] means that the formatting object or property is partially implemented.
[no] means not implemented.

Sometimes items with [yes] have some limitation(s) that do not affect their ability to accomplish the specified tasks.

CSS Level 2 Revision 1 (CSS 2.1)

4 Syntax and basic data types

Name	Condition	Comments
4.3.5 Counters: counter(), counters()	yes	☞ counter() Introduction to CSS for Paged Mediacounter()
4.4 @charset	yes	☞ Encodings

5 Selectors

Name	Condition	Comments
5.2.1 Grouping (,)	yes
5.3 Universal selector (*)	yes
5.4 Type selectors (E)	yes
5.5 Descendant selectors (E F)	yes
5.6 Child selectors (E > F)	yes
5.7 Adjacent sibling selectors (E + F)	yes
5.8.1 Matching attributes and attribute values ([att], [att=val], [att~=val], [att\|=val])	yes
5.8.3 Class selectors (.class)	yes
5.9 ID selectors (#id)	yes
5.11.1 The :first-child pseudo-class	yes
5.11.2 The link pseudo-classes: :link and :visited	partial	:visited is not supported.
5.11.3 The dynamic pseudo-classes: :hover, :active and :focus	no
5.11.4 The language pseudo-class: :lang()	yes
5.12.1 The :first-line pseudo-element	yes
5.12.2 The :first-letter pseudo-element	yes	Only the display model elements below have effects. block list-item table-cell table-caption inline-block Finds the first text in the specified element, but ::first-letter is ignored if images or the following display model elements appear before the text. block elements other than block inline-table inline-block ruby ☞ (-ah-)initial-letters
5.12.3 The :before and :after pseudo-elements	yes

6 Assigning property values, Cascading, and Inheritance

Name	Condition	Comments
6.2.1 The 'inherit' value	yes
6.3 The @import rule	yes	Introduction to CSS for Paged Media@import
6.4.2 !important rules	yes

7 Media types

Name	Condition	Comments
7.2.1 The @media rule	partial	“print” and “all” media types are supported. You can specify a media type called “ah-formatter” and that @media will be applied. If you use other than Antenna House Formatter V7.4, it will be treated as an invalid media type. Although media-query is not supported, you can specify not, such as not screen. Introduction to CSS for Paged Media@media

8 Box model

Name	Condition	Comments
8.3 Margin properties: 'margin-top', 'margin-right', 'margin-bottom', 'margin-left', 'margin'	yes	Introduction to CSS for Paged Mediamargin-top margin-right margin-bottom margin-left margin
8.4 Padding properties: 'padding-top', 'padding-right', 'padding-bottom', 'padding-left', 'padding'	yes	Introduction to CSS for Paged Mediapadding-top padding-right padding-bottom padding-left padding
8.5.1 Border width: 'border-top-width', 'border-right-width', 'border-bottom-width', 'border-left-width', 'border-width'	yes	Introduction to CSS for Paged Mediaborder-top-width border-right-width border-bottom-width border-left-width border-width
8.5.2 Border color: 'border-top-color', 'border-right-color', 'border-bottom-color', 'border-left-color', 'border-color'	yes	The value is extended. ☞ <color>Introduction to CSS for Paged Mediaborder-top-color border-right-color border-bottom-color border-left-color border-color
8.5.3 Border style: 'border-top-style', 'border-right-style', 'border-bottom-style', 'border-left-style', 'border-style'	yes	The value is extended. ☞ <border-style> Introduction to CSS for Paged Mediaborder-top-style border-right-style border-bottom-style border-left-style border-style
8.5.4 Border shorthand properties: 'border-top', 'border-right', 'border-bottom', 'border-left', 'border'	yes	Introduction to CSS for Paged Mediaborder-top border-right border-bottom border-left border

9 Visual formatting model

Name	Condition	Comments
9.2.4 The 'display' property	yes	This property is extended. ☞ display Introduction to CSS for Paged Mediadisplay
9.3.1 Choosing a positioning scheme: 'position'	yes	Introduction to CSS for Paged Mediaposition
9.3.2 Box offsets: 'top', 'right', 'bottom', 'left'	yes	Introduction to CSS for Paged Mediatop right bottom left
9.5.1 Positioning the float: 'float'	yes	The page break (column break) in the float is supported.Introduction to CSS for Paged Mediafloat
9.5.2 Controlling flow next to floats: 'clear'	yes	Introduction to CSS for Paged Mediaclear
9.9.1 Specifying the stack level: 'z-index'	yes	Introduction to CSS for Paged Mediaz-index
9.10 Text direction: 'direction', 'unicode-bidi'	yes

10 Visual formatting model details

Name	Condition	Comments
10.2 Content width: 'width'	yes	Introduction to CSS for Paged Mediawidth
10.4 Minimum and maximum widths: 'min-width', 'max-width'	yes	Introduction to CSS for Paged Mediamin-width max-width
10.5 Content height: 'height'	yes	The setting using the % value for other than the root element is to be ignored if the height is not explicitly specified in the parent block. In Antenna House Formatter V7.4, when a block with height specified is rotated or when values other than visible or auto are specified for the overflow property, it is not ignored. Introduction to CSS for Paged Mediaheight
10.7 Minimum and maximum heights: 'min-height', 'max-height'	yes	With regard to table, there is no distinction between min-height and height. When both are specified, the larger value is adopted as height. Introduction to CSS for Paged Mediamin-height max-height
10.8 Line height calculations: 'line-height', 'vertical-align'	yes	Introduction to CSS for Paged Medialine-height vertical-align

11 Visual effects

Name	Condition	Comments
11.1.1 Overflow: 'overflow'	yes	Limitation: scroll is not supported. This property is extended. ☞ overflow
11.1.2 Clipping: 'clip'	yes
11.2 Visibility: 'visibility'	partial	collapse is considered hidden.

12 Generated content, automatic numbering, and lists

Name	Condition	Comments
12.2 The 'content' property	yes	open-quote, close-quote, no-open-quote and no-close-quote are supported. In Antenna House Formatter V7.4, “content” has been extended to apply to any element. Introduction to CSS for Paged Mediacontent
12.3.1 Specifying quotes with the 'quotes' property	yes
12.4 Automatic counters and numbering: 'counter-reset', 'counter-increment'	yes	When an illegal value (such as 0) is specified for counter-reset, “previous page number + 1” is considered to be specified. Introduction to CSS for Paged Mediacounter-reset counter-increment
12.5.1 Lists: 'list-style-type'	yes	Introduction to CSS for Paged Medialist-style-type
12.5.1 Lists: 'list-style-image'	yes	Introduction to CSS for Paged Medialist-style-image
12.5.1 Lists: 'list-style-position'	yes	Introduction to CSS for Paged Medialist-style-position
12.5.1 Lists: 'list-style'	yes	Introduction to CSS for Paged Medialist-style

13 Paged media

Name	Condition	Comments
13.2 Page boxes: the @page rule	yes	Introduction to CSS for Paged Media@page
13.2.2 Page selectors: selecting left, right, and first pages (:left, :right, :first)	yes	Introduction to CSS for Paged Media:left :right :first
13.3.1 Page break properties: 'page-break-before', 'page-break-after', 'page-break-inside'	yes	Introduction to CSS for Paged Mediapage-break-before page-break-after page-break-inside
13.3.2 Breaks inside elements: 'orphans', 'widows'	yes	Introduction to CSS for Paged Mediaorphans widows

14 Colors and Backgrounds

Name	Condition	Comments
14.1 Foreground color: 'color'	yes	The value is extended. ☞ <color>Introduction to CSS for Paged Mediacolor
14.2.1 Background properties: 'background-color'	yes	The value is extended. ☞ <color>Introduction to CSS for Paged Mediabackground-color
14.2.1 Background properties: 'background-image'	yes	Introduction to CSS for Paged Mediabackground-image
14.2.1 Background properties: 'background-repeat'	yes	Introduction to CSS for Paged Mediabackground-repeat
14.2.1 Background properties: 'background-attachment'	yes	Introduction to CSS for Paged Mediabackground-attachment
14.2.1 Background properties: 'background-position'	yes	Introduction to CSS for Paged Mediabackground-position
14.2.1 Background properties: 'background'	yes	Introduction to CSS for Paged Mediabackground

15 Fonts

Name	Condition	Comments
15.3 Font family: 'font-family'	yes	Introduction to CSS for Paged Mediafont-family
15.4 Font styling: 'font-style'	yes	Introduction to CSS for Paged Mediafont-style
15.5 Small-caps: 'font-variant'	yes	Introduction to CSS for Paged Mediafont-variant
15.6 Font boldness: 'font-weight'	yes	It has been extended to accept any values from 1 to 1000. Introduction to CSS for Paged Mediafont-weight
15.7 Font size: 'font-size'	yes	Introduction to CSS for Paged Mediafont-size
15.8 Shorthand font property: 'font'	yes	Introduction to CSS for Paged Mediafont

16 Text

Name	Condition	Comments
16.1 Indentation: 'text-indent'	yes
16.2 Alignment: 'text-align'	yes	Introduction to CSS for Paged Mediatext-align
16.3.1 Underlining, overlining, striking, and blinking: 'text-decoration'	yes	Limitation: blink is not supported. Introduction to CSS for Paged Mediatext-decoration
16.4 Letter and word spacing: 'letter-spacing', 'word-spacing'	yes
16.5 Capitalization: 'text-transform'	yes
16.6 Whitespace: 'white-space'	yes

17 Tables

Name	Condition	Comments
17.4.1 Caption position and alignment: 'caption-side'	yes	Introduction to CSS for Paged Mediacaption-side
17.5.2 Table width algorithms: 'table-layout'	yes	Introduction to CSS for Paged Mediatable-layout
17.6.1 The separated borders model: 'border-spacing'	yes	Introduction to CSS for Paged Mediaborder-spacing
17.6.1.1 Borders and Backgrounds around empty cells: 'empty-cells'	yes
17.6.2 The collapsing border model: 'border-collapse'	yes	Introduction to CSS for Paged Mediaborder-collapse

18 User interface

Name	Condition	Comments
18.1 Cursors: 'cursor'	no
18.4 Dynamic outlines: 'outline'	no

CSS3/CSS4

As for the implemented CSS3/CSS4 properties and their corresponding XSL-FO properties, see “XSL/CSS Properties”.

Selectors

Name	Condition	Comments
Subsequent-sibling combinator (E ~ F)	yes	[CSS3-Selectors]
Substring matching attribute selectors ([att^=val], [att$=val], [att*=val])	yes	[CSS3-Selectors]

Namespaces

Name	Condition	Comments
@namespace	yes	[CSS3-Namespaces]
Qualified Names (ns\|E)	yes	[CSS3-Namespaces]

@ rules

Name	Condition	Comments
@font-face	partial	[CSS3-Fonts] ☞ <axf:font-face> / @font-face Introduction to CSS for Paged Media@font-face
@footnote	yes	[CSS3-GCPM] footnote-display is not supported yet. ☞ Footnotes/sidenotes by CSS Introduction to CSS for Paged Media@footnote
@sidenote	yes	[CSS3-GCPM] (@sidenote has been removed from GCPM on and after June 8, 2010) ☞ Footnotes/sidenotes by CSS Introduction to CSS for Paged Media@sidenote
@page	yes	[CSS3-Page]Introduction to CSS for Paged Media@page
@page :left, :right, :first, :blank	yes	[CSS3-Page] This rule is extended. ☞ @page Introduction to CSS for Paged Media:left :right :first :blank
@top-left-corner	yes	[CSS3-Page] overflow is invalid. Introduction to CSS for Paged Media@top-left-corner
@top-left	yes
@top-center	yes
@top-right	yes
@top-right-corner	yes
@left-top	yes
@left-middle	yes
@left-bottom	yes
@right-top	yes
@right-middle	yes
@right-bottom	yes
@bottom-left-corner	yes
@bottom-left	yes
@bottom-center	yes
@bottom-right	yes
@bottom-right-corner	yes
@counter-style	partial	[CSS3-CounterStyles] Specifying url() for symbols and additive-symbols etc. is not available. speak-as is not supported. ☞ <axf:counter-style> / @counter-style no-LT Introduction to CSS for Paged Media@counter-style

Pseudo Classes

Name	Condition	Comments
:root	yes	[CSS3-Selectors]
:nth-child()	yes	[CSS4-Selectors] S in [of S] cannot contain pseudo-elements. V7.4
:nth-last-child()	yes	[CSS4-Selectors] S in [of S] cannot contain pseudo-elements. V7.4
:nth-of-type()	yes	[CSS3-Selectors]
:nth-last-of-type()	yes	[CSS3-Selectors]
:first-child	yes	[CSS3-Selectors]
:last-child	yes	[CSS3-Selectors]
:first-of-type	yes	[CSS3-Selectors]
:last-of-type	yes	[CSS3-Selectors]
:only-child	yes	[CSS3-Selectors]
:only-of-type	yes	[CSS3-Selectors]
:empty	yes	[CSS3-Selectors]
:not()	yes	[CSS4-Selectors] :not() is not effective if any of selectors of the argument are pseudo-elements or invalid pseudo-classes. V7.4
:is()	yes	[CSS4-Selectors] V7.4
:where()	yes	[CSS4-Selectors] V7.4
:has()	yes	[CSS4-Selectors] V7.4
:nth()	partial	[CSS3-GCPM] <custom-ident> is not supported.

CAUTION:	When there is an element that may not generate an area, such as when -ah-suppress-duplicate-page-number="true" is specified, :first-child, etc. may not be applied as expected.

Pseudo Elements

Name	Condition	Comments
::footnote-call	yes	[CSS3-GCPM] ☞ Footnotes/sidenotes by CSS Introduction to CSS for Paged Media::footnote-call
::footnote-marker	yes	[CSS3-GCPM] ☞ Footnotes/sidenotes by CSS Introduction to CSS for Paged Media::footnote-marker
::sidenote-call	yes	[CSS3-GCPM] (@sidenote has been removed from GCPM on and after June 8, 2010) ☞ Footnotes/sidenotes by CSS
::sidenote-marker	yes	[CSS3-GCPM] (@sidenote has been removed from GCPM on and after June 8, 2010) ☞ Footnotes/sidenotes by CSS Introduction to CSS for Paged Media::sidenote-marker
::marker	yes	[CSS3-Lists]Introduction to CSS for Paged Media::marker
::before	yes	[CSS3-Selectors] This rule is extended. V7.4 no-LT ☞ CSS ::before / ::after
::after	yes

Functions

Name

Condition

Comments

content()

yes

[CSS3-GCPM]

string()

yes

[CSS3-GCPM]

running()

yes

[CSS3-GCPM]

element()

yes

[CSS3-GCPM] element() cannot be used with any other values. Use it alone.

leader()

yes

[CSS3-GCPM]

target-counter()

yes

[CSS3-GCPM]

target-counters()

[CSS3-GCPM]

target-text()

yes

[CSS3-GCPM]

device-cmyk()

yes

[CSS3-GCPM] (CYMK has been removed from GCPM on and after May 13, 2014)

rgb()

yes

[CSS3-Color]

rgba()

yes

[CSS3-Color]

hsl()

yes

[CSS3-Color]

hsla()

yes

[CSS3-Color]

counter()

yes

[CSS3-Page] ☞ counter()

counters()

yes

[CSS3-Page] ☞ counter()

attr()

yes

[CSS3-Values] ☞ attr()

url()

yes

[CSS3-Values] ☞ URI

calc()

yes

[CSS3-Values]

linear-gradient()

yes

[CSS3-Images] ☞ linear-gradient()

radial-gradient()

yes

[CSS3-Images] ☞ radial-gradient()

repeating-linear-gradient()

yes

[CSS3-Images] ☞ repeating-linear-gradient()

repeating-radial-gradient()

yes

[CSS3-Images] ☞ repeating-radial-gradient()

matrix()

yes

[CSS3-Transforms] ☞ Transformation

translate()

yes

[CSS3-Transforms] ☞ Transformation

translateX()

yes

[CSS3-Transforms] ☞ Transformation

translateY()

yes

[CSS3-Transforms] ☞ Transformation

scale()

yes

[CSS3-Transforms] ☞ Transformation

scaleX()

yes

[CSS3-Transforms] ☞ Transformation

scaleY()

yes

[CSS3-Transforms] ☞ Transformation

rotate()

yes

[CSS3-Transforms] ☞ Transformation

skew()

yes

[CSS3-Transforms] ☞ Transformation

skewX()

yes

[CSS3-Transforms] ☞ Transformation

skewY()

yes

[CSS3-Transforms] ☞ Transformation

symbols()

partial

[CSS3-CounterStyles] Specifying url() is not available. no-LT

CAUTION:	The delimiter of the argument for symbols() is a white space. It isn't a comma. symbols("", "†", "‡") is not correct, it should be symbols("" "†" "‡").

var()

yes

[CSS3-CustomProperties]

repeat()

partial

[CSS3-Grid] Interpolation of two repeat() is not supported. no-LT V7.4