[css2] Minor fixes and work on attr() function

--HG--
extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%401209

Author: ianbjacobs

css2/generate.src

@@ -48,7 +48,7 @@ class="propinst-content">'content'</span> property.
 <h2><a name="before-after-content">The</a> <span class="index-def"
 title=":before|pseudo-elements:::before|before">:before</span> and <span
 class="index-def" title=":after|pseudo-elements:::after|after">:after</span>
-pseudo elements</h2>
+pseudo-elements</h2>
 
 <p>Authors specify the style and location of generated content with
 the :before and :after pseudo-elements. The <span
@@ -62,6 +62,9 @@ from the element to which they are attached.</p>
 specify content, and the style of that content, before and after an
 element's <a href="conform.html#doctree">document tree</a> content.
 
+<!-- Do they allow the position and float properties? Probably
+not. Must say so. -IJ -->
+
 <P>The :before and :after pseudo-elements elements allow 
 values of the <span class="propinst-display">'display'</span>
 property as follows:
@@ -176,37 +179,40 @@ counter at this point in the rendering structure, in the indicated
 style ('decimal' by default).
 
 <dt><span class="index-inst" title="open-quote"><span
-class="value-inst-open-quote"><strong>'open-quote'</strong></span></span> and 
+class="value-inst-open-quote"><strong>open-quote</strong></span></span> and 
 <span class="index-inst" title="close-quote"><span
 class="value-inst-close-quote">'close-quote'</span></span>
 
 <dd>Both of these values are replaced by the appropriate string
 from the <span class="propinst-quotes"><strong>'quotes'</strong></span> property.
 
 <dt><span class="index-inst" title="no-open-quote"><span
-class="value-inst-no-open-quote"><strong>'no-open-quote'</strong></span></span>
+class="value-inst-no-open-quote"><strong>no-open-quote</strong></span></span>
 
 <dd>Inserts nothing (the empty string), but increments the level of
 nesting for quotes.
 
 <dt><span class="index-inst" title="no-close-quote"><span
-class="value-inst-no-close-quote"><strong>'no-close-quote'</strong></span></span>
+class="value-inst-no-close-quote"><strong>no-close-quote</strong></span></span>
 
 <dd>Inserts nothing (the empty string), but decrements the level of
 nesting for quotes.
-</dl>
 
-<p>It is also possible to insert the value of an <span
-class="index-inst" title="attr()">attribute</span>, by using the 
-<!--<a href="syndata.html#attr">-->
-'attr()'
-<!--</a>-->
- function.
-<!--<p>Attributes in the source document can also be used wherever
-strings are expected.-->
-The function <span class="index-def" title="attr()">'attr(X)'</span>
-returns the value of attribute X. If the current element doesn't have
-an attribute X, an empty string is returned.
+<dt><span class="index-def" title="attr()">attr(X)</span>
+<dd>It is also possible to insert the value of an 
+attribute by using the
+'attr()' function, which returns the value of attribute X. If
+the current element doesn't have an attribute X, an empty string is
+returned. 
+
+<P>If two or more attributes named 'X' appear in a selector,
+the value of the rightmost attribute is the one inserted
+by 'attr(X)'.
+
+<p>The case-sensitivity of attribute names depends on the
+document language.
+
+<p class="note">[Should the name of the attribute be quoted? BB]
 
 <!--
 <p>Note that the string is parsed according to the rules of the
@@ -215,23 +221,19 @@ document language, not CSS, which means that numerical escapes like
 space and an "A", resp.), but that backslashes are not special ("\20"
 is <em>not</em> replaced by a space).
 -->
+</dl>
+
 
 <div class="example">
-<p>This rule inserts the text of the ALT attribute before the
+<p>This rule inserts the text of the HTML "alt" attribute before the
 image. If the image is not displayed, the reader will still see the
-ALT text.
+"alt" text.
 
 <pre>
-IMG:before {content: attr(ALT)}
+IMG:before {content: attr(alt)}
 </pre>
 </div>
 
-<p class="note">[Should the name of the attribute be quoted? BB]
-
-<!-- About extending this to other types than strings:
-Note: URL is subtle. Must return the BASE of the
-source document and return a location-independent URL -->
-
 <div class=note>
 <p><em><strong>Note.</strong> In future levels of CSS, the <span
 class="propinst-content">'content'</span> property may accept