1 files changed, 18 insertions, 2 deletions
diff --git a/stdlib/source/program/aedifex/dependency.lux b/stdlib/source/program/aedifex/dependency.lux
index b7b605447..f06b00260 100644
--- a/stdlib/source/program/aedifex/dependency.lux
+++ b/stdlib/source/program/aedifex/dependency.lux
@@ -2,13 +2,14 @@
   [lux (#- Type)
    [abstract
     [equivalence (#+ Equivalence)]
+    [order (#+ Order)]
     [hash (#+ Hash)]]
    [data
     ["." product]
-    ["." text
+    ["." text ("#\." order)
      ["%" format (#+ format)]]]]
   ["." // #_
-   ["#" artifact (#+ Artifact)
+   ["#" artifact (#+ Artifact) ("#\." order)
     [type (#+ Type)]]])
 
 (type: #export Dependency
@@ -25,3 +26,18 @@
 (def: #export equivalence
   (Equivalence Dependency)
   (\ hash &equivalence))
+
+(implementation: #export order
+  (Order Dependency)
+
+  (def: &equivalence
+    ..equivalence)
+
+  (def: (< reference subject)
+    (<| (or (//\< (get@ #artifact reference)
+                  (get@ #artifact subject)))
+        
+        (and (//\= (get@ #artifact reference)
+                   (get@ #artifact subject)))
+        (text\< (get@ #type reference)
+                (get@ #type subject)))))