From ab0e6a9f8d5b6078ea6f597535bcd906f0af5c84 Mon Sep 17 00:00:00 2001
From: Chris Markiewicz <effigies@gmail.com>
Date: Tue, 2 May 2023 07:53:20 -0400
Subject: [PATCH] ENH: Define a Delimiter field for column descriptions

---
 src/common-principles.md         | 1 +
 src/schema/objects/columns.yaml  | 1 +
 src/schema/objects/metadata.yaml | 7 +++++++
 3 files changed, 9 insertions(+)

diff --git a/src/common-principles.md b/src/common-principles.md
index 2dc9905d9a..997fb8b275 100644
--- a/src/common-principles.md
+++ b/src/common-principles.md
@@ -483,6 +483,7 @@ and a guide for using macros can be found at
         ),
         "Levels": "RECOMMENDED",
         "Units": "RECOMMENDED",
+        "Delimiter": "OPTIONAL",
         "TermURL": "RECOMMENDED",
         "HED": "OPTIONAL",
    }
diff --git a/src/schema/objects/columns.yaml b/src/schema/objects/columns.yaml
index 77d997e071..c6d5478533 100644
--- a/src/schema/objects/columns.yaml
+++ b/src/schema/objects/columns.yaml
@@ -56,6 +56,7 @@ channel:
     If multiple channels are specified, separate with commas (`,`) or a
     delimiter specified in the `"Delimiter"` field describing the `channel`
     column.
+  type: string
 color:
   name: color
   display_name: Color label
diff --git a/src/schema/objects/metadata.yaml b/src/schema/objects/metadata.yaml
index d0fa480198..53bcbe205e 100644
--- a/src/schema/objects/metadata.yaml
+++ b/src/schema/objects/metadata.yaml
@@ -570,6 +570,13 @@ DelayTime:
     This field is mutually exclusive with `"VolumeTiming"`.
   type: number
   unit: s
+Delimiter:
+  name: Delimiter
+  display_name: Delimiter
+  description: |
+    If a column may be interpreted as a list of values, the character that
+    separates one value from the next.
+  type: string
 Density:
   name: Density
   display_name: Density