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[css2] Added tty media type and note about pixel units
--HG-- extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%40446
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‎css2/media.src‎

Lines changed: 43 additions & 29 deletions
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<html lang="en">
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<!-- $Id: media.src,v 1.23 1997-11-21 00:08:06 ian Exp $ -->
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<!-- $Id: media.src,v 1.24 1997-11-26 00:10:38 ian Exp $ -->
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<HEAD>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<TITLE>Media types</TITLE>
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<LINK rel="next" href="box.html">
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<LINK rel="next" href="flowobj.html">
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<LINK rel="previous" href="cascade.html">
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<LINK rel="STYLESHEET" href="style/default.css" type="text/css">
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</HEAD>
@@ -117,7 +117,7 @@ save the UA a fruitless download.
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<pre>
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@import url(fineprint.css) print;
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@import url(blueish.css) projection, tv;
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@import url(bluish.css) projection, tv;
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</pre>
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</div>
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@@ -132,51 +132,65 @@ class="index-inst" title="@media">@media</span>. However, user agents
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that elect to support the devices in the following list must recognize
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the associated media type:
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<ul>
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<li><samp>SCREEN:</samp> intended primarily for scrolled color computer
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<dl>
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<dt><strong>screen</strong>
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<dd>Intended primarily for scrolled color computer
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screens. See the section on
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<a href="#scrolled-media">scrollable media</a> for more information.
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<li><samp>PRINT:</samp> intended for paged, opaque
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material and for documents viewed on screen in print preview mode.
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Please consult the section on <a href="page.html">paged media</a> for
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information about formatting issues that are specific to paged media.
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<dt><strong>tty</strong>
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<dd>Intended for media using a fixed-pitch character
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grid, such as teletypes, terminals, or portable devices with limited
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display capabilities.
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<P>Authors should not use <a href="syndata.html#pixel-units">pixel
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units</a> with the "tty" media type.
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<li><samp>PROJECTION:</samp> intended for projected presentations, for
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<dt><strong>tv</strong>
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<dd>Intended for television-type devices (low
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resolution, color, limited scrollability).
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<dt><strong>projection</strong>
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<dd>Intended for projected presentations, for
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example projectors or print to transparencies.
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Please consult the section on <a href="page.html">paged media</a> for
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information about formatting issues that are specific to paged media.
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<li><samp>BRAILLE:</samp> intended for braille tactile feedback
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devices. [HWL: we should also have a media type for Braille printers]
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<dt><strong>handheld</strong>
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<dd>Intended for handheld devices (small
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screen, monochrome, limited bandwidth).
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<li><samp>AURAL:</samp> intended for speech synthesizers. See the
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section on <a href="./aural.html">aural style sheets</a> for details.
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<dt><strong>print</strong>
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<dd>Intended for paged, opaque material and for documents viewed on
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screen in print preview mode. Please consult the section on <a
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href="page.html">paged media</a> for information about formatting
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issues that are specific to paged media.
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<li><samp>TV:</samp> intended for television-type devices (low
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resolution, color, limited scrollability).
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<dt><strong>braille</strong>
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<dd>Intended for braille tactile feedback
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devices. [HWL: we should also have a media type for Braille printers]
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<li><samp>HANDHELD:</samp> intended for handheld devices (small
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screen, monochrome, limited bandwidth).
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<dt><strong>aural</strong>
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<dd>Intended for speech synthesizers. See the
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section on <a href="./aural.html">aural style sheets</a> for details.
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<li><samp>ALL:</samp> suitable for all devices.
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</ul>
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<dt><strong>all</strong>
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<dd>Suitable for all devices.
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</dl>
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<P>Media types are case-insensitive.
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<P>Media type names are case-insensitive.
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<!-- IJ: Include definitions of "visual", "paged", etc. here.
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Link to them from the property/descriptor definitions -->
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<H3><a name="canvas">The canvas</a></H3>
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<P>For all media, the term <span class="index-def" title="canvas">
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canvas</span> means "the space where rendering objects are rendered"
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(see the <a href="process.html">CSS2
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process model</a>). For a screen, the canvas is a rectangular space
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generally of fixed width and "infinite" length. For paged media, the
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canvas is a sequence of rectangular page boxes of fixed width and height.
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For aural media, the canvas is a three dimensional audio space.
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canvas</span> means "the space where rendering objects are rendered."
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For a screen, the canvas is a rectangular space generally of fixed
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width and "infinite" length. For paged media, the canvas is a sequence
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of rectangular page boxes of fixed width and height. For aural media,
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the canvas is a three dimensional audio space.
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<H4><a name="scrolled-media">Scrollable media</a></H4>
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@@ -194,7 +208,7 @@ change the dimensions of the canvas when the viewport is resized.
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<P>In general, when a document doesn't cover the entire canvas, the
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User agent should "borrow" the background of the root element. Since
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the BODY element is often percieved as the root element in HTML, this
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the BODY element is often perceived as the root element in HTML, this
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special rules apply to HTML documents: if
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the <span class="propinst-background">'background'</span> value of the
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HTML element is different from 'transparent' then use it, else use the

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