From be713824d659f5763b4f90a99b05aadb1ddd34c8 Mon Sep 17 00:00:00 2001
From: Ryan Ly <310197+rly@users.noreply.github.com>
Date: Wed, 10 Dec 2025 16:59:50 -0800
Subject: [PATCH 1/2] Add optional device link to TimeSeries

---
 core/nwb.base.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/core/nwb.base.yaml b/core/nwb.base.yaml
index ce0a3fa0..a294dec1 100644
--- a/core/nwb.base.yaml
+++ b/core/nwb.base.yaml
@@ -249,6 +249,14 @@ groups:
       stored external to the NWB file, in files storing raw data. Once timestamp
       data is calculated, the contents of 'sync' are mostly for archival purposes.
     quantity: '?'
+  links:
+  - name: device
+    target_type: Device
+    doc: Device used to record this time series. This should not be used to represent
+      a relationship between a stimulation time series and the device used for
+      stimulation; that relationship should be represented through other means in the
+      file.
+    quantity: '?'
 
 - neurodata_type_def: ProcessingModule
   neurodata_type_inc: NWBContainer

From 2941bd5d4cfcec4e5e3c0f4ebedf38dcd7cee418 Mon Sep 17 00:00:00 2001
From: Ryan Ly <310197+rly@users.noreply.github.com>
Date: Wed, 10 Dec 2025 17:02:23 -0800
Subject: [PATCH 2/2] Add link from TimeSeries to Device in release notes

---
 docs/format/source/format_release_notes.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/format/source/format_release_notes.rst b/docs/format/source/format_release_notes.rst
index 2be07957..a3fdb27a 100644
--- a/docs/format/source/format_release_notes.rst
+++ b/docs/format/source/format_release_notes.rst
@@ -12,6 +12,7 @@ Minor changes
   that are typically used together for analysis, such as spike sorting. (#659)
 - Specified that units for ``ElectrodesTable`` coordinate fields (``x``, ``y``, ``z``, ``rel_x``, ``rel_y``, ``rel_z``)
   should be in microns. (#658)
+- Added optional link from ``TimeSeries`` to ``Device`` to represent the device used to record the time series. (#662)
 
 
 2.9.0 (June 26, 2025)