Add a SAML 2 interoperability measure, as the product of IdP and SP s…

…upport measures.

charting/saml2.pl

@@ -19,6 +19,7 @@
 	push @overallRatio, $saml2total/$entities;
 	push @idpRatio, $saml2idp/$idps;
 	push @spRatio, $saml2sp/$sps;
+	push @product, ($saml2idp/$idps)*($saml2sp/$sps);
 	close TXT;
 }
 
@@ -37,4 +38,9 @@
 	print "$ratio\n";
 }
 
+print "product\n";
+foreach $ratio (@product) {
+	print "$ratio\n";
+}
+
 1;