diff --git a/resources/scalars.json b/resources/scalars.json
index 17ffe9d1..5f2d8308 100644
--- a/resources/scalars.json
+++ b/resources/scalars.json
@@ -3,6 +3,7 @@
     "protoType": "double",
     "notes": "",
     "cppType": "double",
+    "rustType": "f64",
     "csType": "double",
     "goType": "float64",
     "javaType": "double",
@@ -14,6 +15,7 @@
     "protoType": "float",
     "notes": "",
     "cppType": "float",
+    "rustType": "f32",
     "csType": "float",
     "goType": "float32",
     "javaType": "float",
@@ -25,6 +27,7 @@
     "protoType": "int32",
     "notes": "Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint32 instead.",
     "cppType": "int32",
+    "rustType": "i32",
     "csType": "int",
     "goType": "int32",
     "javaType": "int",
@@ -36,6 +39,7 @@
     "protoType": "int64",
     "notes": "Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint64 instead.",
     "cppType": "int64",
+    "rustType": "i64",
     "csType": "long",
     "goType": "int64",
     "javaType": "long",
@@ -47,6 +51,7 @@
     "protoType": "uint32",
     "notes": "Uses variable-length encoding.",
     "cppType": "uint32",
+    "rustType": "u32",
     "csType": "uint",
     "goType": "uint32",
     "javaType": "int",
@@ -58,6 +63,7 @@
     "protoType": "uint64",
     "notes": "Uses variable-length encoding.",
     "cppType": "uint64",
+    "rustType": "u64",
     "csType": "ulong",
     "goType": "uint64",
     "javaType": "long",
@@ -69,6 +75,7 @@
     "protoType": "sint32",
     "notes": "Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.",
     "cppType": "int32",
+    "rustType": "i32",
     "csType": "int",
     "goType": "int32",
     "javaType": "int",
@@ -80,6 +87,7 @@
     "protoType": "sint64",
     "notes": "Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s.",
     "cppType": "int64",
+    "rustType": "i64",
     "csType": "long",
     "goType": "int64",
     "javaType": "long",
@@ -91,6 +99,7 @@
     "protoType": "fixed32",
     "notes": "Always four bytes. More efficient than uint32 if values are often greater than 2^28.",
     "cppType": "uint32",
+    "rustType": "u64",
     "csType": "uint",
     "goType": "uint32",
     "javaType": "int",
@@ -102,6 +111,7 @@
     "protoType": "fixed64",
     "notes": "Always eight bytes. More efficient than uint64 if values are often greater than 2^56.",
     "cppType": "uint64",
+    "rustType": "u64",
     "csType": "ulong",
     "goType": "uint64",
     "javaType": "long",
@@ -113,6 +123,7 @@
     "protoType": "sfixed32",
     "notes": "Always four bytes.",
     "cppType": "int32",
+    "rustType": "i32",
     "csType": "int",
     "goType": "int32",
     "javaType": "int",
@@ -124,6 +135,7 @@
     "protoType": "sfixed64",
     "notes": "Always eight bytes.",
     "cppType": "int64",
+    "rustType": "i64",
     "csType": "long",
     "goType": "int64",
     "javaType": "long",
@@ -135,6 +147,7 @@
     "protoType": "bool",
     "notes": "",
     "cppType": "bool",
+    "rustType": "bool",
     "csType": "bool",
     "goType": "bool",
     "javaType": "boolean",
@@ -146,6 +159,7 @@
     "protoType": "string",
     "notes": "A string must always contain UTF-8 encoded or 7-bit ASCII text.",
     "cppType": "string",
+    "rustType": "String",
     "csType": "string",
     "goType": "string",
     "javaType": "String",
@@ -157,6 +171,7 @@
     "protoType": "bytes",
     "notes": "May contain any arbitrary sequence of bytes.",
     "cppType": "string",
+    "rustType": "Vec<u8>",
     "csType": "ByteString",
     "goType": "[]byte",
     "javaType": "ByteString",
diff --git a/template.go b/template.go
index b8b5224d..4010ca26 100644
--- a/template.go
+++ b/template.go
@@ -80,7 +80,8 @@ func NewTemplate(descs []*protokit.FileDescriptor) *Template {
 					if valueField.Name != "value" {
 						panic(fmt.Sprintf("expected map entry's first field to be 'value', not '%s'", valueField.Name))
 					}
-					typeName := fmt.Sprintf("map<%s, %s>", keyField.Type, valueField.Type)
+					typeName := fmt.Sprintf("map&lt;%s, %s&gt;", keyField.Type, valueField.Type)
+					f.Label = ""
 					f.Type = typeName
 					f.FullType = typeName
 					f.LongType = typeName
@@ -424,6 +425,7 @@ type ScalarValue struct {
 	Notes      string `json:"notes"`
 	CppType    string `json:"cppType"`
 	CSharp     string `json:"csType"`
+	RustType   string `json:"rustType"`
 	GoType     string `json:"goType"`
 	JavaType   string `json:"javaType"`
 	PhpType    string `json:"phpType"`
diff --git a/template_test.go b/template_test.go
index 90b5cc16..dd1a7b5c 100644
--- a/template_test.go
+++ b/template_test.go
@@ -277,10 +277,10 @@ func TestFieldProperties(t *testing.T) {
 
 	field = findField("properties", findMessage("Vehicle", vehicleFile))
 	require.Equal(t, "properties", field.Name)
-	require.Equal(t, "repeated", field.Label)
-	require.Equal(t, "map<string, string>", field.Type)
-	require.Equal(t, "map<string, string>", field.LongType)
-	require.Equal(t, "map<string, string>", field.FullType)
+	require.Equal(t, "", field.Label)
+	require.Equal(t, "map&lt;string, string&gt;", field.Type)
+	require.Equal(t, "map&lt;string, string&gt;", field.LongType)
+	require.Equal(t, "map&lt;string, string&gt;", field.FullType)
 	require.Empty(t, field.DefaultValue)
 	require.True(t, field.IsMap)
 	require.False(t, field.IsOneof)