[css-scroll-snap] Fix snap wording.

Author: tabatkins

css-scroll-snap/Overview.bs

@@ -325,43 +325,45 @@ Scroll Snapping Rules: the 'scroll-snap-type' property {#snap-type}
 	</div>
 
 	The axis values specifies what axis(es) are affected by <a>snap positions</a>,
-	and which <a>snapping behavior</a> the <a>scroll container</a> uses.
+	and whether <a>snap positions</a> are evaluated independently per axis,
+	or together as a 2D point.
 	Values are defined as follows:
 
 	<dl dfn-type=value dfn-for="scroll-snap-type">
 		<dt><dfn>x</dfn>
 		<dd>
-			The <a>scroll container</a> does <a>axis snapping</a> in its horizontal axis only.
+			The <a>scroll container</a> <a>axis-snaps</a> to <a>snap positions</a> in its horizontal axis only.
 
 		<dt><dfn>y</dfn>
 		<dd>
-			The <a>scroll container</a> does <a>axis snapping</a> in its vertical axis only.
+			The <a>scroll container</a> <a>axis-snaps</a> to <a>snap positions</a> in its vertical axis only.
 
 		<dt><dfn>block</dfn>
 		<dd>
-			The <a>scroll container</a> does <a>axis snapping</a> in its block axis only.
+			The <a>scroll container</a> <a>axis-snaps</a> to <a>snap positions</a> in its block axis only.
 
 		<dt><dfn>inline</dfn>
 		<dd>
-			The <a>scroll container</a> does <a>axis snapping</a> in its inline axis only.
+			The <a>scroll container</a> <a>axis-snaps</a> to <a>snap positions</a> in its inline axis only.
 
 		<dt><dfn>both</dfn>
 		<dd>
-			The <a>scroll container</a> does <a>axis snapping</a> in both of its axises independently.
+			The <a>scroll container</a> <a>axis-snaps</a> to <a>snap positions</a> in both of its axises independently
+			(potentially snapping to different elements in each axis).
 
 		<dt><dfn>point</dfn>
 		<dd>
-			The <a>scroll container</a> does <a>point snapping</a>.
+			The <a>scroll container</a> <a>point-snaps</a> to <a>snap positions</a> in both axises simultaneously,
+			treating each element’s <a>snap position</a> as a single 2D position
+			(rather than potentially snapping to different elements in each axis).
 	</dl>
 
 	If no axis value is specified, then the axis is automatically computed:
 
 	*	If the <a>scroll container</a> is only scrollable in one axis
 		(only one axis has its 'overflow' set to ''overflow/auto'' or ''overflow/scroll'')
-		the scrollable axis is chosen.
-	*	Otherwise, the <a>scroll container’s</a> <a>block axis</a> is chosen.
-
-	In either case, the <a>scroll container</a> does <a>axis snapping</a>.
+		it <a>axis-snaps</a> in the scrollable axis only.
+	*	Otherwise, it <a>axis-snaps</a> in its <a>block axis</a> only.
 
 <!--
 ████████     ███    ████████  ████████  ████ ██    ██  ██████
@@ -554,7 +556,7 @@ Scroll Snapping Alignment: the 'scroll-snap-align' property {#scroll-snap-alignm
 			Issue: It's not 100% clear if this value is necessary, given handling for <a href="#snap-overflow">over-large elements</a>.
 	</dl>
 
-	If the element's <a>scroll container</a> is <a>point snapping</a>,
+	If the element's <a>scroll container</a> is <a>point-snapping</a>,
 	and this property does not specify a single valid <a>snap position</a> in both axises
 	(that is, it contains ''scroll-snap-align/none'' or ''edges''),
 	the element does not contribute any <a>snap positions</a> at all.
@@ -780,33 +782,32 @@ Types of Scrolling Methods {#scroll-types}
  ██████ ████████        █████████ ████████
 -->
 
-Axis vs Point Snapping {#snap-dimensions}
+Axis vs Point-Snapping {#snap-dimensions}
 -----------------------------------------
 
 	There are two distinct <dfn lt="snap behavior|snapping behavior">snapping behaviors</dfn> that a <a>scroll container</a> might engage in:
 
-	: <dfn export local-lt="axis" lt="axis snapping|axis-snapping">axis snapping</dfn>
-	:: If a <a>scroll container</a> is engaging in <a>axis snapping</a>,
+	: <dfn export local-lt="axis" lt="axis-snapping|axis-snap">axis-snapping</dfn>
+	:: If a <a>scroll container</a> is <a>axis-snapping</a>,
 		its descendants indicate a desired scroll position
-		in one axis of the <a>scroll container</a> only,
-		with no preference for what the other axis's scroll position should be.
+		in each axis of the <a>scroll container</a> independently,
+		with no dependent preference for what the other axis's scroll position should be.
 
-		Note: This is the “default” type of <a>snap position</a>
-		that most elements will want to use,
-		and so the ''scroll-snap-align'' property intentionally makes it the simplest to specify.
+		Note: This is the “default” type of <a>snap behavior</a>
+		that most <a>scroll containers</a> will want to use,
+		and so the ''scroll-snap-type'' property intentionally defaults to it.
 
-		Note: An element can declare two <a>snap positions</a>,
+		Note: An element in an <a>axis-snapping</a> <a>scroll container</a>
+		can declare two <a>snap positions</a>,
 		one in each axis.
-		If the <a>scroll container</a> is <a>axis snapping</a>,
-		these represent two independent <a>snap position</a> preferences.
 		If one of the element's <a>snap positions</a> is chosen in one axis,
 		this has no bearing on the other dimension's <a>snap position</a>--
 		it might be chosen,
 		or a different element's <a>snap position</a> might be chosen for that axis,
 		or that axis might not snap at all.
 
-	: <dfn export local-lt="point" lt="point snapping|point-snapping">point snapping</dfn>
-	:: If a <a>scroll container</a> is engaging in <a>point snapping</a>,
+	: <dfn export local-lt="point" lt="point-snapping|point-snap">point-snapping</dfn>
+	:: If a <a>scroll container</a> is <a>point-snapping</a>,
 		its descendants indicate a desired scroll position
 		in both axises of the <a>scroll container</a> simultaneously--
 		in other words,
@@ -847,17 +848,20 @@ Choosing Snap Positions {#choosing}
 		and the final snapped scroll position,
 		subject to the additional constraints listed in this section.
 
-	* <a>Point snapping</a> is all-or-nothing;
-		if one <a>snap position</a> of an element is chosen to align to,
+	* <a>Point-snapping</a> is all-or-nothing;
+		if the <a>snap position</a> of an element is chosen to align to,
 		the <a>scroll container</a> must set its scroll position
 		according to the element's <a>snap positions</a> in <em>both</em> axises;
 		the <a>scroll container</a> <em>must not</em> “partially align” to the element
 		by taking its <a>snap position</a> in one axis
 		and aligning the other axis according to something else.
 
-	* If a scroll is <a>axis-locked</a> and the <a>scroll container</a> is <a>axis snapping</a>,
-		any <a>snap positions</a> in the other axis should be ignored;
-		if the <a>scroll container</a> is <a>point snapping</a>,
+	* If a scroll is <a>axis-locked</a> and the <a>scroll container</a> is <a>axis-snapping</a>,
+		any <a>snap positions</a> in the other axis should be ignored
+		during the scroll.
+		(However, <a>snap positions</a> in the other axis can still effect the final scroll position.)
+
+		If a scroll is <a>axis-locked</a> and the <a>scroll container</a> is <a>point-snapping</a>,
 		<a>snap positions</a> should be penalized in the selection process
 		according to the amount of other-axis scrolling they would cause.