diff --git a/cwltool/schemas/v1.1.0-dev1/Process.yml b/cwltool/schemas/v1.1.0-dev1/Process.yml
index cd8a5485d..5e4079f63 100644
--- a/cwltool/schemas/v1.1.0-dev1/Process.yml
+++ b/cwltool/schemas/v1.1.0-dev1/Process.yml
@@ -454,6 +454,30 @@ $graph:
       type: string?
       jsonldPredicate: "rdfs:label"
       doc: "A short, human-readable label of this process object."
+    - name: secondaryFiles
+      type:
+        - "null"
+        - string
+        - Expression
+        - type: array
+          items: [string, Expression]
+      jsonldPredicate: "cwl:secondaryFiles"
+      doc: |
+        Only valid when `type: File` or is an array of `items: File`.
+
+        Describes files that must be included alongside the primary file(s).
+
+        If the value is an expression, the value of `self` in the expression
+        must be the primary input or output File to which this binding applies.
+
+        If the value is a string, it specifies that the following pattern
+        should be applied to the primary file:
+
+          1. If string begins with one or more caret `^` characters, for each
+            caret, remove the last file extension from the path (the last
+            period `.` and all following characters).  If there are no file
+            extensions, the path is unchanged.
+          2. Append the remainder of the string to the end of the file path.
 
 
 - name: InputRecordSchema