diff --git a/example_metadata.py b/example_metadata.py
index 64ae244..5125a60 100644
--- a/example_metadata.py
+++ b/example_metadata.py
@@ -15,7 +15,7 @@
         {
             "core:sample_start": 0,         # The sample index that these parameters take effect.
             "core:frequency": 900000000,    # The center frequency of the recording (900 MHz, here).
-            "core:time": "2017-02-01T11:33:17053240428Z"
+            "core:datetime": "2017-02-01T11:33:17053240428Z"
         },
         {
             "core:sample_start": 100000,    # Mandatory
diff --git a/sigmf/schema.json b/sigmf/schema.json
index 5d43214..62bd42a 100644
--- a/sigmf/schema.json
+++ b/sigmf/schema.json
@@ -28,7 +28,7 @@
                 "required": false,
                 "help": "Sample data license"
             },
-            "core:date": {
+            "core:datetime": {
                 "type": "string",
                 "required": false,
                 "pattern": "",
@@ -68,12 +68,12 @@
                 "required": false,
                 "help": "Center frequency of signal (Hz)"
             },
-            "core:sampling_rate": {
+            "core:sample_rate": {
                 "type": "double",
                 "required": false,
                 "help": "Sampling rate of signal (Sps)"
             },
-            "core:time": {
+            "core:datetime": {
                 "type": "string",
                 "required": false,
                 "help": "Start time of chunk"
diff --git a/tests/test_sigmffile.py b/tests/test_sigmffile.py
index 142af94..16325b8 100644
--- a/tests/test_sigmffile.py
+++ b/tests/test_sigmffile.py
@@ -33,7 +33,7 @@
 def simulate_capture(sigmf_md, n, capture_len):
     start_index = capture_len * n
 
-    capture_md = {"core:time": utils.get_sigmf_iso8601_datetime_now()}
+    capture_md = {"core:datetime": utils.get_sigmf_iso8601_datetime_now()}
 
     sigmf_md.add_capture(start_index=start_index, metadata=capture_md)
 
diff --git a/tests/test_validation.py b/tests/test_validation.py
index c31159a..07a2e3e 100644
--- a/tests/test_validation.py
+++ b/tests/test_validation.py
@@ -28,16 +28,16 @@
         "core:offset": 0,
         "core:version": "X.X.X",
         "core:license": "CC0",
-        "core:date": "foo",
+        "core:datetime": "foo",
         "core:url": "foo",
         "core:sha512": "69a014f8855058d25b30b1caf4f9d15bb7b38afa26e28b24a63545734e534a861d658eddae1dbc666b33ca1d18c1ca85722f1f2f010703a7dbbef08189a1d0e5"
     },
     "captures": [
         {
             "core:sample_start": 0,
-            "core:sampling_rate": 10000000,
+            "core:sample_rate": 10000000,
             "core:frequency": 950000000,
-            "core:time": "2017-02-01T11:33:17,053240428+01:00",
+            "core:datetime": "2017-02-01T11:33:17,053240428+01:00",
             "uhd:gain": 34
         },
         {