diff --git a/app/models/synapse.rb b/app/models/synapse.rb
index 68041e1e..1fa376e0 100644
--- a/app/models/synapse.rb
+++ b/app/models/synapse.rb
@@ -57,6 +57,7 @@ class Synapse < ApplicationRecord
     output += %(  mm:topic1 d:topic_#{topic1_id} ;\n)
     output += %(  mm:topic2 d:topic_#{topic2_id} ;\n)
     output += %(  mm:direction "#{category}" ;\n)
+    output += %(  rdfs:comment "#{desc}" ;\n)
     output[-2] = '.'
     output += %(\n)
     output
diff --git a/app/models/topic.rb b/app/models/topic.rb
index 274256c3..d4319ea3 100644
--- a/app/models/topic.rb
+++ b/app/models/topic.rb
@@ -88,6 +88,8 @@ class Topic < ApplicationRecord
     output += %(  rdfs:label "#{name}";\n)
     output += %(  rdfs:comment "#{desc}";\n)
     output += %(  foaf:homepage <#{link}>;\n) if link.present?
+    output += %(  mm:mapper d:mapper_#{user_id} ;\n)
+    output += %(  mm:metacode "#{metacode.name} ;\n)
     output[-2] = '.' # change last ; to a .
     output += %(\n)
     output