add DDI refs

test of adding to references

Author: altergc

SDTH/doc/content/model-specification.markdown

@@ -113,7 +113,7 @@ An sdth:VariableInstance is an instantiation of the ddi-cdi:InstanceVariable and
 - prov:Entity, provone:Data
 
 **is in domain of**
--- sdth:hasName, sdth:wasDerivedFrom, sdth:elaborationOf
+- sdth:hasName, sdth:wasDerivedFrom, sdth:elaborationOf
 
 **is in range of**
 - sdth:hasVarInstance, sdth:wasDerivedFrom, sdth:elaborationOf

SDTH/doc/index.html

@@ -106,6 +106,22 @@
           status: "published",
           publisher: "DataONE",
     },
+      ddiLifecycle: {
+        title: "DDI Lifecycle 3.3",
+        authors: "DDI Alliance",
+        date: "2020",
+        href: "https://ddialliance.org/Specification/DDI-Lifecycle/3.3/",
+        status: "published",
+        publisher: "DDI Alliance"
+      },
+      ddiCodebook: {
+        title: "DDI-Codebook 2.5",
+        authors: "DDI Alliance",
+        date: "2014",
+        href: "https://ddialliance.org/Specification/DDI-Codebook/2.5/",
+        status: "published",
+        publisher: "DDI Alliance"
+      },
       }
     };
     </script>