[Checkins] SVN: grokcore.component/trunk/README.txt add subscriptions in the readme

[Jan-Wijbrand Kolman]

Log message for revision 120314:
  add subscriptions in the readme

Changed:
  U   grokcore.component/trunk/README.txt

-=-
Modified: grokcore.component/trunk/README.txt
===================================================================
--- grokcore.component/trunk/README.txt	2011-02-14 09:52:49 UTC (rev 120313)
+++ grokcore.component/trunk/README.txt	2011-02-14 09:57:47 UTC (rev 120314)
@@ -213,3 +213,13 @@
       """Updated the Dublin Core 'Modified' property when a modified
       event is sent for an object."""
       IZopeDublinCore(obj).modified = datetime.datetime.utcnow()
+
+Subscriptions
+-------------
+
+Subscriptions look similar to Adapter, however, unlike regular adapters,
+subscription adapters are used when we want all of the adapters that adapt an
+object to a particular adapter.
+
+Analogous to MultiAdapter, there is a MultiSubscription component that "adapts"
+multiple objects.