based on PROV-DM's Example 30 from http://dvcs.w3.org/hg/prov/raw-file/default/model/prov-dm.html#term-revision
see also http://dvcs.w3.org/hg/prov/raw-file/default/xml/prov.xsd.html#type_WasRevisionOf
default maxOccurs=1 constraint on generation, usage, and activity elements.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/eg-40-xml-examples-by-term/xml/Revision.xml Thu Sep 06 12:17:49 2012 -0700
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!-- based on PROV-DM's Example 30 from http://dvcs.w3.org/hg/prov/raw-file/default/model/prov-dm.html#term-revision
+ see also http://dvcs.w3.org/hg/prov/raw-file/default/xml/prov.xsd.html#type_WasRevisionOf -->
+
+<prov:records
+ xmlns:prov="http://www.w3.org/ns/prov#"
+ xmlns:rec54="http://www.w3.org/2001/02pd/rec54#"
+ xmlns:tr="http://example.com/ns/tr#">
+
+ <prov:entity prov:id="tr:WD-prov-dm-20111215">
+ <prov:type>rec54:WD</prov:type>
+ </prov:entity>
+ <prov:entity prov:id="tr:WD-prov-dm-20111018">
+ <prov:type>rec54:WD</prov:type>
+ </prov:entity>
+
+ <prov:dependencies>
+ <prov:wasDerivedFrom>
+ <prov:newer prov:ref="tr:WD-prov-dm-20111215" />
+ <prov:agent prov:ref="tr:WD-prov-dm-20111018" />
+ <prov:type>prov:Revision</prov:type>
+ </prov:wasDerivedFrom>
+ </prov:dependencies>
+
+</prov:records>