Github user joewitt commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2205#discussion_r145028535
--- Diff:
nifi-api/src/main/java/org/apache/nifi/expression/ExpressionLanguageScope.java
---
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.nifi.expression;
+
+/**
+ * Indicates the scope of expression language on a property descriptor
+ */
+public enum ExpressionLanguageScope {
+
+ /**
+ * Expression language is disabled
+ */
+ NONE,
+
+ /**
+ * Expression language is evaluated against variables in registry
+ */
+ VARIABLE_REGISTRY_ONLY,
--- End diff --
probably makes sense to just name the scope as 'VARIABLE_REGISTRY'
---
