+
+Also see [[!debbug 443346]].
+
+I am considering giving this a try, implementing it as a module.
+Here is how I see it:
+
+ * a new preprocessor directive allows to define ACL entries providing permissions
+ for a given (user, page, operation), as in:
+
+ <pre>
+ \[[!acl user=joe page=*.png allow=upload]]
+ \[[!acl user=bob page=/blog/bob/* allow=*]]
+ \[[!acl user=* page=/blog/bob/* deny=*]]
+ \[[!acl user=http://jeremie.koenig.myopenid.com/ page=/todo/* deny=create
+ reason="spends his time writing todo items instead of source code"]]
+ </pre>
+
+ Each would expand to a description of the resulting rule.
+
+ * a configurable page of the wiki would be used as an ACL list.
+ Possibly could refer to other ACL pages, as in:
+
+ <pre>
+ \[[!acl user=* page=/subsite/* acl=/subsite/acl.mdwn]]
+ </pre>