Author: lwall
Date: 2009-06-30 01:44:51 +0200 (Tue, 30 Jun 2009)
New Revision: 27312

[S11] some notes on ambiguous authority specs

Modified: docs/Perl6/Spec/S11-modules.pod
--- docs/Perl6/Spec/S11-modules.pod     2009-06-29 22:40:43 UTC (rev 27311)
+++ docs/Perl6/Spec/S11-modules.pod     2009-06-29 23:44:51 UTC (rev 27312)
@@ -12,8 +12,8 @@
     Created: 27 Oct 2004
-    Last Modified: 30 Mar 2009
-    Version: 28
+    Last Modified: 29 Jun 2009
+    Version: 29
 =head1 Overview
@@ -401,6 +401,21 @@
 to guarantee that you get the unembraced Perl.  C<:-)>
+When it happens that the same module is available from more than one
+authority, and the desired authority is not specified by the C<use>,
+the version lineage that was created first wins, unless overridden by
+local policy or by official abandonment by the original authority (as
+determined either by the author or by community consensus in case the
+author is no longer available or widely regarded as uncooperative).
+An officially abandoned lineage will be selected only if it is the
+only available lineage of locally installed modules.
+Once the authority is selected, then and only then is any version
+selection done; the version specification is ignored until the
+authority is selected.  This implies that all official modules record
+permanently when they were first installed in the official library,
+and this creation date is considered immutable.
 For wildcards any valid smartmatch selector works:
     use Dog:ver(v1.2.1 | v1.3.4):auth(/:i jrandom/);

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