Address Brad's comments.

ni/protobuf/types/precision_timestamp.proto

@@ -18,16 +18,16 @@ option php_namespace = "NI\\PROTOBUF\\TYPES";
 option ruby_package = "NI::Protobuf::Types";
 
 // A PrecisionTimestamp represents a point in time expressed in NI Binary Time Format (NI-BTF).
+// https://www.ni.com/docs/en-US/bundle/labwindows-cvi/page/cvi/libref/ni-btf.htm
 // NI-BTF stores time values in Coordinated Universal Time (UTC) format.
 // A PrecisionTimestamp is encoded as a count of seconds and fractions of seconds at
-// 2 exp(-64) resolution. The count is relative to an epoch at UTC midnight on
-// January 1, 1904, Universal Time.
+// 2^-64 resolution. The count is relative to an epoch of January 1, 1904.
 message PrecisionTimestamp
 {
-  // Represents seconds of UTC time since epoch
+  // Represents the number of seconds since the epoch
   // 1904-01-01T00:00:00Z.
   int64 seconds = 1;
-  
-  // Non-negative fractions of a second at 2 exp(-64) resolution.
+
+  // Non-negative fractions of a second at 2^-64 resolution.
   uint64 fractional_seconds = 2;
 }

ni/protobuf/types/waveform.proto

@@ -24,18 +24,21 @@ message DoubleWaveform
 {
   // The trigger time of the waveform.
   PrecisionTimestamp t0 = 1;
+
   // The time interval in seconds between data points in the waveform.
   double dt = 2;
+
   // The data values of the waveform.
   repeated double y_data = 3;
+
   // The names and values of all waveform attributes.
   // A waveform attribute is metadata attached to a waveform.
   // It is represented in this message as a map associating the name of the attribute with the value described by WaveformAttributeValue.
-  // The NI-DAQ driver sets the following string attributes:
-  // NI_DeviceNumber: the device number of the hardware device producing the waveform.
+  // The NI-DAQmx driver sets the following string attributes:
   // NI_ChannelName: the name of the virtual channel producing the waveform.
   // NI_LineNames: the name of the digital line in the waveform.
   // NI_UnitDescription: the units of measure for the waveform.
+  // NI_dBReference: the reference value to use when converting measurement levels to decibel.
   // For additional information on waveform attributes, please visit https://www.ni.com/docs/en-US/bundle/labview-api-ref/page/functions/get-waveform-attribute.html
   map<string, WaveformAttributeValue> attributes = 4;
 }
@@ -48,10 +51,13 @@ message WaveformAttributeValue
   {
     // Represents a bool attribute.
     bool bool_value = 1;
+
     // Represents an integer attribute.
     int32 integer_value = 2;
+
     // Represents a double attribute.
     double double_value = 3;
+
     // Represents a string attribute.
     string string_value = 4;
   }