diff --git a/resultstore/entity.go b/resultstore/entity.go
index f1d9b0a..0a4176d 100644
--- a/resultstore/entity.go
+++ b/resultstore/entity.go
@@ -14,43 +14,18 @@
 	api "google.golang.org/genproto/googleapis/devtools/resultstore/v2"
 )
 
-func timeToProtoTimestamp(input time.Time) *timestamp.Timestamp {
-	output, err := ptypes.TimestampProto(input)
-	if err != nil {
-		// We should never get here unless the caller manually created some strange,
-		// invalid time.Time value or the ResultStore API returned a nil value.
-		panic(err.Error())
-	}
-	return output
-}
+const (
+	// The filename to use for a test's log file. Result Store recognizes this file name
+	// and displays it by default when a target is opened in the UI.
+	testLogName = "test.log"
+)
 
-func durationToProtoDuration(input time.Duration) *duration.Duration {
-	return ptypes.DurationProto(input)
-}
-
-func mapToProperties(input map[string]string) []*api.Property {
-	var props []*api.Property
-	for k, v := range input {
-		props = append(props, &api.Property{Key: k, Value: v})
-	}
-	return props
-}
-
-func lookupFileURI(files []*api.File, fileID string) string {
-	for _, file := range files {
-		if file.Uid == fileID {
-			return file.Uri
-		}
-	}
-	return ""
-}
-
-// Invocation maps to a ResultStore Invocation. See full docs at:
-// https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/invocation.proto
+// Invocation maps to a ResultStore Invocation.
+//
+// See https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/invocation.proto
+// for more documentation.
 type Invocation struct {
-	// The name of this Invocation as it appears in ResultStore.
-	Name string
-	// The ID of this invocation as it appears in ResultStore.
+	Name       string
 	ID         string
 	ProjectID  string
 	Users      []string
@@ -106,12 +81,12 @@
 	}
 }
 
-// Configuration maps to a ResultStore Configuration.  See full docs at:
-// https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/configuration.proto
+// Configuration maps to a ResultStore Configuration.
+//
+// See https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/configuration.proto
+// for more documentation.
 type Configuration struct {
-	// The name of this Configuration as it appears in ResultStore.
-	Name string
-	// The ID of this Configuration as it appears in ResultStore.
+	Name         string
 	ID           string
 	InvocationID string
 	Properties   map[string]string
@@ -136,8 +111,10 @@
 	}
 }
 
-// Target maps to a ResultStore Target.  See full docs at:
-// https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/target.proto
+// Target maps to a ResultStore Target.
+//
+// See https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/target.proto
+// for more documentation.
 type Target struct {
 	Name       string
 	ID         *TargetID
@@ -175,7 +152,7 @@
 		Visible:    true,
 		Files: []*api.File{
 			&api.File{
-				Uid: "test.log",
+				Uid: testLogName,
 				Uri: t.TestLogURI,
 			},
 		},
@@ -192,8 +169,10 @@
 	}
 }
 
-// ConfiguredTarget maps to a ResultStore ConfiguredTarget.  See full docs at:
-// https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/configured_target.proto
+// ConfiguredTarget maps to a ResultStore ConfiguredTarget.
+//
+// See https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/configured_target.proto
+// for more documentation.
 type ConfiguredTarget struct {
 	Name       string
 	ID         *ConfiguredTargetID
@@ -243,8 +222,10 @@
 	}
 }
 
-// TestAction maps to a ResultStore Action with a child TestAction.  See full docs at:
-// https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/action.proto
+// TestAction maps to a ResultStore Action with a child TestAction.
+//
+// See https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/action.proto
+// for more documentation.
 type TestAction struct {
 	Name       string
 	ID         *TestActionID
@@ -286,7 +267,7 @@
 		},
 		Files: []*api.File{
 			&api.File{
-				Uid: "test.log",
+				Uid: testLogName,
 				Uri: a.TestLogURI,
 			},
 		},
@@ -309,6 +290,10 @@
 	}
 }
 
+// Status describes the status of a ResultStore entity.
+//
+// See https://github.com/googleapis/googleapis/blob/master/google/devtools/resultstore/v2/common.proto
+// for more documentation.
 type Status string
 
 const (
@@ -337,3 +322,25 @@
 		return api.Status_UNKNOWN
 	}
 }
+
+func timeToProtoTimestamp(input time.Time) *timestamp.Timestamp {
+	output, err := ptypes.TimestampProto(input)
+	if err != nil {
+		// We should never get here unless the caller manually created some strange,
+		// invalid time.Time value or the ResultStore API returned a nil value.
+		panic(err.Error())
+	}
+	return output
+}
+
+func durationToProtoDuration(input time.Duration) *duration.Duration {
+	return ptypes.DurationProto(input)
+}
+
+func mapToProperties(input map[string]string) []*api.Property {
+	var props []*api.Property
+	for k, v := range input {
+		props = append(props, &api.Property{Key: k, Value: v})
+	}
+	return props
+}