Adding metrics page

content/modules/ROOT/pages/index.adoc

@@ -17,12 +17,11 @@ This documentation lists the set of:
 - Properties xref:properties.adoc[definitions]
 ** xref:properties.adoc#fairness[Fairness]
 ** xref:properties.adoc#ethics[Ethics]
-- Associated concepts
+- Associated xref:concepts.adoc[concepts]
 ** xref:concepts.adoc#bias[Bias]
 ** Discrimination
 ** Equity
-- Associated metrics
-- ...
+- Associated xref:metrics.adoc[metrics]
 
 == Contact
 

content/modules/ROOT/pages/metrics.adoc

+= Metrics
+
+WARNING: To be constructed...