diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 8b6d0831..c18e9575 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -339,6 +339,14 @@ Dart:
   type: programming
   primary_extension: .dart
 
+Datomic:
+  type: data
+  ace_mode: clojure
+  color: "#db5855"
+  primary_extension: .dtm
+  extensions:
+  - .dtm
+
 Delphi:
   type: programming
   color: "#b0ce4e"
diff --git a/samples/Datomic/bigger-than-pluto.dtm b/samples/Datomic/bigger-than-pluto.dtm
new file mode 100644
index 00000000..47ce43cd
--- /dev/null
+++ b/samples/Datomic/bigger-than-pluto.dtm
@@ -0,0 +1,76 @@
+[{:db/id #db/id [db.part/db]
+  :db/ident :object/name
+  :db/doc "Name of a Solar System object."
+  :db/valueType :db.type/string
+  :db/index true
+  :db/cardinality :db.cardinality/one
+  :db.install/_attribute :db.part/db}
+ {:db/id #db/id [db.part/db]
+  :db/ident :object/meanRadius
+  :db/doc "Mean radius of an object."
+  :db/index true
+  :db/valueType :db.type/double
+  :db/cardinality :db.cardinality/one
+  :db.install/_attribute :db.part/db}
+ {:db/id #db/id [db.part/db]
+  :db/ident :data/source
+  :db/doc "Source of the data in a transaction."
+  :db/valueType :db.type/string
+  :db/index true
+  :db/cardinality :db.cardinality/one
+  :db.install/_attribute :db.part/db}]
+[{:db/id #db/id [db.part/tx]
+  :db/doc "Solar system objects bigger than Pluto."}
+ {:db/id #db/id [db.part/tx]
+  :data/source "http://en.wikipedia.org/wiki/List_of_Solar_System_objects_by_size"}
+ {:db/id #db/id [db.part/user]
+  :object/name "Sun"
+  :object/meanRadius 696000.0}
+ {:db/id #db/id [db.part/user]
+  :object/name "Jupiter"
+  :object/meanRadius 69911.0}
+ {:db/id #db/id [db.part/user]
+  :object/name "Saturn"
+  :object/meanRadius 58232.0}
+ {:db/id #db/id [db.part/user]
+  :object/name "Uranus"
+  :object/meanRadius 25362.0}
+ {:db/id #db/id [db.part/user]
+  :object/name "Neptune"
+  :object/meanRadius 24622.0}
+ {:db/id #db/id [db.part/user]
+  :object/name "Earth"
+  :object/meanRadius 6371.0}
+ {:db/id #db/id [db.part/user]
+  :object/name "Venus"
+  :object/meanRadius 6051.8}
+ {:db/id #db/id [db.part/user]
+  :object/name "Mars"
+  :object/meanRadius 3390.0}
+ {:db/id #db/id [db.part/user]
+  :object/name "Ganymede"
+  :object/meanRadius 2631.2}
+ {:db/id #db/id [db.part/user]
+  :object/name "Titan"
+  :object/meanRadius 2576.0}
+ {:db/id #db/id [db.part/user]
+  :object/name "Mercury"
+  :object/meanRadius 2439.7}
+ {:db/id #db/id [db.part/user]
+  :object/name "Callisto"
+  :object/meanRadius 2410.3}
+ {:db/id #db/id [db.part/user]
+  :object/name "Io"
+  :object/meanRadius 1821.5}
+ {:db/id #db/id [db.part/user]
+  :object/name "Moon"
+  :object/meanRadius 1737.1}
+ {:db/id #db/id [db.part/user]
+  :object/name "Europa"
+  :object/meanRadius 1561.0}
+ {:db/id #db/id [db.part/user]
+  :object/name "Triton"
+  :object/meanRadius 1353.4}
+ {:db/id #db/id [db.part/user]
+  :object/name "Eris"
+  :object/meanRadius 1163.0}]