diff --git a/web/thesauruses/_meta/facts.json b/web/thesauruses/_meta/facts.json
new file mode 100644
index 000000000..a07f36e65
--- /dev/null
+++ b/web/thesauruses/_meta/facts.json
@@ -0,0 +1,13 @@
+{
+  "meta": {
+    "structure": "facts",
+    "structure_name": "Facts"
+  },
+  "categories": {
+    "Asserting Facts": {
+	"assert": "Asserting Facts"
+    },
+    "Retracting Facts": {
+	"retract": "Retracting Facts"
+    }
+}
diff --git a/web/thesauruses/_meta/rules.json b/web/thesauruses/_meta/rules.json
new file mode 100644
index 000000000..a56c9570b
--- /dev/null
+++ b/web/thesauruses/_meta/rules.json
@@ -0,0 +1,13 @@
+{
+  "meta": {
+    "structure": "rules",
+    "structure_name": "Rules"
+  },
+  "categories": {
+    "Defining Rules": {
+	"defrule": "Defining Rules"
+    },
+    "Undefining Rules": {
+	"undefrule": "Undefining Rules"
+    }
+}
diff --git a/web/thesauruses/clips/641/rules.json b/web/thesauruses/clips/641/rules.json
index db285fa59..31f2b1a43 100644
--- a/web/thesauruses/clips/641/rules.json
+++ b/web/thesauruses/clips/641/rules.json
@@ -6,18 +6,18 @@
     "structure": "rules"
   },
   "concepts": {
-    "assert": {
+    "defrule": {
       "code": [
         "(defrule my-rule",
 	"    (my-fact ?value)", 
 	"=>",
         "(println \"My value: \" ?value))"
       ],
-      "name": "Defining a Rule in the CLIPS environment"
+      "name": "Creating a Defrule in the CLIPS environment"
     },
     "undefrule": {
       "code": "(undefrule my-rule)",
-      "name": "Deleting a Rule from the CLIPS environment"
+      "name": "Deleting a Defrule from the CLIPS environment"
     }
   }
 }