[css-anchor-position-1] Rename x/y-self-start/end to self-x/y-start/end w3c#12749

Author: fantasai

css-anchor-position-1/Overview.bs

@@ -686,12 +686,12 @@ The allowed syntax of a <<position-area>> value is:
 <dfn>&lt;position-area></dfn> = [
 	[ left | center | right | span-left | span-right
 	| x-start | x-end | span-x-start | span-x-end
-	| x-self-start | x-self-end | span-x-self-start | span-x-self-end
+	| self-x-start | self-x-end | span-self-x-start | span-self-x-end
 	| span-all ]
 	||
 	[ top | center | bottom | span-top | span-bottom
 	| y-start | y-end | span-y-start | span-y-end
-	| y-self-start | y-self-end | span-y-self-start | span-y-self-end
+	| self-y-start | self-y-end | span-self-y-start | span-self-y-end
 	| span-all ]
 |
 	[ block-start | center | block-end | span-block-start | span-block-end | span-all ]
@@ -717,8 +717,8 @@ by specifying the rows and columns the region occupies as follows:
 <dl dfn-type=value dfn-for="position-area, <position-area>">
 	: <dfn>start</dfn>, <dfn>end</dfn>, <dfn>self-start</dfn>, <dfn>self-end</dfn>
 	: <dfn>top</dfn>, <dfn>bottom</dfn>, <dfn>left</dfn>, <dfn>right</dfn>
-	: <dfn>y-start</dfn>, <dfn>y-end</dfn>, <dfn>y-self-start</dfn>, <dfn>y-self-end</dfn>
-	: <dfn>x-start</dfn>, <dfn>x-end</dfn>, <dfn>x-self-start</dfn>, <dfn>x-self-end</dfn>
+	: <dfn>y-start</dfn>, <dfn>y-end</dfn>, <dfn>self-x-start</dfn>, <dfn>self-y-end</dfn>
+	: <dfn>x-start</dfn>, <dfn>x-end</dfn>, <dfn>self-x-start</dfn>, <dfn>self-x-end</dfn>
 	: <dfn>block-start</dfn>, <dfn>block-end</dfn>, <dfn>self-block-start</dfn>, <dfn>self-block-end</dfn>
 	: <dfn>inline-start</dfn>, <dfn>inline-end</dfn>, <dfn>self-inline-start</dfn>, <dfn>self-inline-end</dfn>
 	: <dfn>center</dfn>
@@ -733,14 +733,14 @@ by specifying the rows and columns the region occupies as follows:
 		but in the specified physical axis.
 
 		The ''self-*'' logical keywords
-		(''position-area/self-start'', ''position-area/x-self-end'', etc)
+		(''position-area/self-start'', ''position-area/self-x-end'', etc)
 		are identical,
 		but refer to the box's own [=writing mode=].
 
 	: <dfn>span-start</dfn>, <dfn>span-end</dfn>, <dfn>span-self-start</dfn>, <dfn>span-self-end</dfn>
 	: <dfn>span-top</dfn>, <dfn>span-bottom</dfn>, <dfn>span-left</dfn>, <dfn>span-right</dfn>
-	: <dfn>span-y-start</dfn>, <dfn>span-y-end</dfn>, <dfn>span-y-self-start</dfn>, <dfn>span-y-self-end</dfn>
-	: <dfn>span-x-start</dfn>, <dfn>span-x-end</dfn>, <dfn>span-x-self-start</dfn>, <dfn>span-x-self-end</dfn>
+	: <dfn>span-y-start</dfn>, <dfn>span-y-end</dfn>, <dfn>span-self-y-start</dfn>, <dfn>span-self-y-end</dfn>
+	: <dfn>span-x-start</dfn>, <dfn>span-x-end</dfn>, <dfn>span-self-x-start</dfn>, <dfn>span-self-x-end</dfn>
 	: <dfn>span-block-start</dfn>, <dfn>span-block-end</dfn>, <dfn>span-self-block-start</dfn>, <dfn>span-self-block-end</dfn>
 	: <dfn>span-inline-start</dfn>, <dfn>span-inline-end</dfn>, <dfn>span-self-inline-start</dfn>, <dfn>span-self-inline-end</dfn>
 	:: Two adjacent rows or columns,
@@ -2602,6 +2602,9 @@ Significant changes since the <a href="https://www.w3.org/TR/2025/WD-css-anchor-
 
 ISSUE: Audit <a href="https://github.com/w3c/csswg-drafts/commits/main/css-anchor-position-1">changes</a>!
 
+* Rename <css>x/y-self-start/end</css> keywords to <css>self-x/y-start/end</css> for 'position-area'
+	due to persistent confusion about the ordering.
+	(<a href="https://github.com/w3c/csswg-drafts/issues/12749">Issue 12749</a>)
 * Fix grammar of 'position-try-fallbacks' to exclude lists of ''position-area/none'' keywords.
 	(<a href="https://github.com/w3c/csswg-drafts/issues/12838">Issue 12838</a>)